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This research explores how monopoly markets operate in the context of a sharia-based microeconomy, with a primary focus on how prices are regulated based on the principle of adl or justice. Unlike traditional monopolies, which often create inefficiencies in resource allocation and exploit consumers, Islamic teachings require fair prices, in accordance with the Quran's prohibition of gharar (uncertainty) and zulm (oppression). Referring to the theories of Ibn Taymiyyah and modern thinkers such as Chapra, we examine how monopoly companies can achieve maslahah or mutual benefit through profit restrictions, combining prices with zakat, and supervision by a sharia council. Through a simple mathematical model, we prove that monopolies regulated by justice produce better Pareto outcomes than equilibria that only maximize profits, by reducing social losses while still encouraging innovation. Empirical data from Islamic markets in Indonesia, such as halal commodities, support these findings, where regulations can stabilize prices at 15-20% lower. The conclusion of this study highlights the importance of Sharia principles in managing sustainable markets in developing countries, with policy recommendations to reform antitrust rules to align with the maqasid al-Shariah.

The decline in the performance of the die casting machine in 1998 after a long period of producing copper terminals showed dimensional defects and instability in product quality, especially in nozzle clogging, reduced copper flow, crust buildup on the gooseneck, plunger movement obstruction, and hydraulic pressure leaks. The purpose of planning the replacement and repair of die-casting machine components is to obtain replacement and repair costs, replacement and repair schedules for the period 2026, and the ratio of maintenance costs to profits. The replacement and repair planning method includes collecting previous maintenance data, applying the inspection-replace-repair-overhaul (IRRO) method, evaluating component conditions, predicting component service life, predicting labor costs, predicting supporting equipment to be used in maintenance, predicting the time to replace spare parts or reinstall repaired components, estimating replacement and repair costs for the period 2026, and calculating the ratio of replacement and repair costs to profits. The planning results obtained replacement and repair costs for the 2026 period are 75.770.000,- IDR with an estimated die casting machine rental rate of  1,500,000 IDR/hour which has the potential to be rented for 1,200 hours/year, and the ratio of maintenance costs to profits is 10,02 % which implies that the die casting machine with a capacity of 40 units/hour is still suitable for use and has the prospect of generating profits for the next few years.

The problem with a 4-stroke gasoline engine-driven electric generator is a decrease in tool performance due to wear on important components for the stator, cooling fan, air filter, oil filter, and gasket. The purpose of component replacement planning is to obtain replacement costs, maintenance schedules in 2027, and the ratio of maintenance costs to profits. The component replacement planning method includes collecting maintenance data from previous years, applying the inspection-replace-repair-overhaul (IRRO) method, assessing component conditions, predicting component lifespan, predicting labor costs, predicting supporting equipment to be used in maintenance, predicting spare part replacement times, predicting maintenance costs in 2027, and calculating the ratio of maintenance costs to profits. The results of the replacement planning obtained maintenance costs in 2027 amounting to IDR 570,007,- with an estimated electric generator rental rate of IDR 30,000,-/hour which has the potential to be rented for 128 hours/year, a profit of IDR 3,840,000,- was obtained, and the ratio of maintenance costs to profits was 14.84% which implies that a 2.5 kW electric generator that uses gasoline-pertalite fuel of around 1.5 liters/hour at maximum power is still suitable for use in the next few years and has the potential to generate profits.

The problem with a passenger car with a capacity of 15 people lies in its unscheduled maintenance and having broken down on the road. The purpose of component replacement planning is to obtain component replacement costs, maintenance and repair schedules for the 2026 period, and the maintenance cost-to-profit ratio. The planning method includes collecting previous maintenance data, applying the inspection-replace-repair-overhaul (IRRO) method, evaluating component conditions, estimating component lifespan, estimating labor costs, estimating supporting equipment to be used in maintenance, estimating the time to replace spare parts or reinstall repaired components, estimating maintenance and repair costs for the 2026 period, and calculating the maintenance cost-to-profit ratio. The results of component replacement planning obtained costs for the 2026 period are IDR 11,780,000 with an estimated passenger car rental rate of IDR 800,000/24 ​​hours (day) which has the potential to be rented for 4,320 hours/year, and the ratio of maintenance costs to profits is 10.33% which implies that passenger cars with a capacity of 15 people are still prospective to generate profits and are suitable for use for the next few years.  

Unexpected downtime of a 2 kg/hour coffee grinder is crucial in cafe operations, thus less guaranteeing the availability of the grinder. The purpose of component replacement and repair planning is to obtain a prediction of the maintenance and repair schedule and costs in the 2026 period. The component replacement planning method includes collecting previous maintenance and repair data, applying the inspection-replace-repair-overhaul (IRRO) method, assessing component conditions, predicting component life, predicting technician costs, predicting supporting work equipment and supporting materials to be used in maintenance, predicting the time to replace spare parts or reinstall components after repair, estimating maintenance and repair costs for the 2026 period, and calculating the ratio of maintenance costs to profits. The results of component replacement and repair planning obtained maintenance costs for the 2026 period are IDR 2,350,000, - with an estimated coffee grinder rental rate of IDR 25,000/hour which has the potential to be rented for 1440 hours/year, and the ratio of maintenance costs to profits is 6.5% which implies that the coffee grinder with a capacity of 2 kg / hour is still suitable for use for the next few years and still has the opportunity to make a profit.

The problems encountered are damage to the rubber wheel mount and universal/cross joints on the 90 m/hour capacity wood profile making machine, which can affect the uniformity and speed of wood profile making. Maintenance and repair planning aims to be able to create a maintenance and repair schedule for the 90 m/hour capacity wood profile making machine for the period 2026, estimate maintenance costs and the ratio of maintenance and repair costs to machine profits. The maintenance planning method includes collecting maintenance data from previous maintenance periods, reviewing the specifications of the wood profile making machine, estimating the age and price of components that are estimated to be damaged, estimating the cost and duration of dismantling and installing components that have been repaired in accordance with the provisions of the requirements for usable components or replacement spare parts, scheduling maintenance and repairs, estimating maintenance and repair costs for the period 2026, and determining the ratio of maintenance costs to profits. The planning results in the form of a maintenance-repair schedule for the period 2026; maintenance and repair costs in 2026, the ratio of maintenance costs to profits, and their implications indicate that the machine is still prospective and usable.

This study seeks to evaluate the extent to which profitability, leverage, independent commissioners, and political links influence tax avoidance in Indonesian mining companies for the 2021–2024 timeframe. The mining sector was chosen because it contributes significantly to national income but is typically associated with the practice of tax avoidance. The novelty of this study lies in the addition of the political connections variable, which has rarely been studied in the context of Indonesian mining. The research data were obtained from annual reports and financial statements of companies obtained through purposive sampling, resulting in 77 observations. Multiple linear regression analysis under a quantitative method was applied, and the evidence suggests that profitability contributes positively to tax avoidance, as higher profits are associated with a stronger tendency for companies to minimize tax payments. Conversely, political connections have a negative effect, indicating that political and military experience shapes loyalty to the interests of the state, thereby encouraging tax compliance. Meanwhile, leverage and independent commissioners do not exert any influence on tax avoidance. The outcomes of this research may serve as a reference for regulators, scholars, and investors to better comprehend the determinants of tax avoidance and to contribute to enhancing governance structures and refining tax policy.

The COVID-19 pandemic significantly affected the financial performance of PT Kereta Api Indonesia (Persero), as reflected in the shift from profit in 2020 to a substantial pre-tax loss in 2021. This change had direct implications for the company’s tax components, particularly current tax and deferred tax, in accordance with PSAK 46 on Income Taxes. This study aims to analyze the changes in current tax and deferred tax between the two reporting periods and to examine the role of deferred tax benefits in reducing the company’s net loss. The research employs a quantitative descriptive approach with a comparative analysis method using secondary data from the company’s interim consolidated financial statements. The findings indicate that in 2021 the company recognized a deferred tax benefit that converted total income tax into a net tax benefit, thereby reducing the company’s net loss by approximately 15.8 percent. These results demonstrate that deferred tax does not merely arise from temporary differences but can function as an instrument of loss mitigation during periods of financial distress. The implications of this study highlight the importance of accurate application of PSAK 46, especially in times of economic downturn, and emphasize the need for realistic assessments of future taxable profits to ensure the reliability of deferred tax asset recognition.

The problem faced is the decline in the performance of a 650 liter/minute centrifugal pump due to wear on components, especially the impeller, rolling bearings, and mechanical seals in supplying process water and clean water in industrial production systems. The planning objective is to obtain a maintenance schedule for a 650 liter/minute centrifugal pump for the operational period of 2026 and the ratio between maintenance costs and profits generated by the machine. The maintenance planning method includes collecting maintenance data from previous maintenance periods, reviewing centrifugal pump specifications, applying the inspection, replace, repair, and overhaul (IRRO) approach, estimating the age and price of components that are expected to be damaged, estimating the cost and duration of dismantling and installing components that have been repaired in accordance with the provisions of the requirements for usable components or replacement parts, scheduling maintenance and repairs, estimating maintenance and repair costs for the 2026 period, and determining the ratio of maintenance costs to profits. The planning results are in the form of a maintenance schedule for the 2026 period worth IDR 4,290,000,-, a maintenance cost to profit ratio of 7.44% and the implications indicate that the machine is still suitable for use and prospective for operations in the next few years.  

This study aims to analyze the effect of asset growth, capital structure, and asset structure on the profitability of PT Astra Graphia Tbk during the period 2016–2023. The research employs a quantitative approach with a causal research design using secondary data derived from the company’s quarterly financial statements. A total of 32 quarterly observations were selected through purposive sampling. Profitability is measured using Return on Equity (ROE), while data analysis is conducted using multiple linear regression. Prior to hypothesis testing, classical assumption tests including normality, multicollinearity, heteroskedasticity, and autocorrelation tests were performed to ensure the robustness of the regression model. The results indicate that asset growth, capital structure, and asset structure simultaneously have a significant effect on firm profitability. However, partially, only asset structure has a significant effect on profitability, while asset growth and capital structure show no significant influence. These findings suggest that efficient asset composition plays a more critical role in improving profitability than mere asset expansion or increased leverage. The managerial implication of this study highlights the importance of optimizing asset structure to enhance the firm’s ability to generate sustainable profits.

The development of modern business has given rise to various marketing models, one of which is Multi-Level Marketing (MLM). However, in practice, many parties misuse this system into a pyramid scheme, a business model that prioritizes profits from recruiting new members rather than from actual product sales. This phenomenon causes harm to society and raises moral as well as religious concerns in Islamic law. This study aims to analyze the recruitment strategies and compensation patterns used in pyramid schemes disguised as MLM, examine them from the perspective of Islamic economics, and provide a comparison with Multi-Level Marketing systems that operate in accordance with Islamic principles. This research employs a descriptive qualitative method with a literature study approach by reviewing various sources such as books, scientific journals, and relevant academic documents. The results indicate that the recruitment system and compensation pattern in pyramid schemes contain elements of gharar, tadlis, dharar, and zhulm, all of which contradict Islamic economic principles. Therefore, the public is advised to be more cautious in choosing MLM businesses, as such models are permissible in Islam only if they focus on selling lawful (halal) products, are conducted honestly and transparently, and provide fair benefits for all parties involved.

This study focuses on analyzing the influence of sustainability reports, free cash flow, and sales growth on the financial performance of energy sector companies listed on the Indonesia Stock Exchange (IDX) during the 2019–2023 period. Financial performance is measured using Return on Assets (ROA) as the main indicator to assess a company's ability to generate profits from its total assets. This study uses a quantitative approach with multiple linear regression analysis to examine the relationship between variables. The data used are documentary data with secondary data sources obtained from financial reports and company sustainability reports. A purposive sampling technique was applied to determine the research sample based on certain criteria, resulting in 95 observational data. The results show that free cash flow and sales growth have a significant influence on financial performance, indicating that the company's ability to generate free cash and increase sales directly contribute to performance improvements. Conversely, sustainability reports were not proven to have a significant effect on financial performance, so sustainability disclosure has not been a determining factor in increasing the ROA of energy sector companies during the study period.

Progressive wear on drive belt components, brake lining thickness, double lining bowl and other components of continuously variable transmission (CVT) on 160 cm3 automatic motorcycles are the problems faced. The purpose of component replacement planning is to obtain maintenance costs in 2026 and maintenance to profit ratio. The component replacement planning method includes collecting previous maintenance data, applying the inspection-replace-repair-overhaul (IRRO) method, evaluating component conditions, predicting component lifespan, predicting labor costs, predicting supporting equipment and supporting materials to be used in maintenance, predicting spare part replacement time, predicting maintenance costs in 2026, and calculating the maintenance cost to profit ratio. The results of component replacement planning obtained maintenance costs in 2026 are IDR 8.151.667,- with an estimated rental rate for Automatic Motorcycles of IDR 12,500/hour which has the potential to be rented for 3960 hours/year, and the ratio of maintenance costs to profits is 16.4% which implies that the 160 cm3 Automatic Motorcycle which was first used in 2021 is still prospective to generate profits and is suitable for use in the coming years.

The problem with the sugarcane press machine is a decrease in performance in sugarcane pressing because it has been used since 2020 with an initial price of IDR 3,000,000, which is predicted to be IDR 5,500,000 in 2025 which occurs in the main components of the roler mill, V-belt, and bearings. The purpose of scheduling replacements and repairs is to obtain a schedule, estimated maintenance costs, and the ratio of replacement and repair costs to the profit of renting a sugarcane press for the period 2026. The scheduling method includes collecting data on the use of the sugarcane press machine, a list of replacements for 5 components for roler mills, V-belts, bearings, gasoline motor tanks, and engine frames from 34 components, component prices, estimated labor costs, equipment costs, supporting material costs, application of the inspection, replace, repair, and overhaul (IRRO) method, scheduling replacements and repairs, and calculating the ratio of replacement costs to profits. The results of the replacement and repair scheduling are in the form of maintenance costs of IDR 958,000, with a rate of IDR 10,000/hour for 588 hours/year, resulting in a profit of IDR 5,880,000, and a ratio of maintenance and repair costs to profit of 0.16%.

Problems in the meatball dough grinder are low production, increasing maintenance costs and disappointed meatball dough customers who receive orders late due to problems with the electric motor, Pulley, V belt, cutting knife. The purpose of the replacement scheduling is to obtain costs, maintenance-repair schedules in the period 2026, and the ratio of maintenance costs to profits. The replacement scheduling method includes collecting previous period maintenance data, applying the inspection-replace-repair-overhaul (IRRO) method, evaluating component working conditions, predicting component life, predicting repairman costs, predicting supporting equipment that will be used in maintenance, predicting the time to replace spare parts or reinstall components after repair, estimating maintenance and repair costs in 2026, and calculating the ratio of maintenance costs to profits. The results of the replacement scheduling show that the maintenance costs in 2026 are IDR 2,530,000 with an estimated rental rate for the meatball dough grinder of IDR 10,000/kg which has the potential to be rented for 1300 hours/year, and the ratio of maintenance costs to profits is 4.9% which implies that the meatball dough grinder with a capacity of 5 kg/hour still has the potential to sell well and is suitable for use in the coming years.

This study aims to examine how profits and company size affect tax avoidance in energy companies listed on the stock exchange between 2022 and 2024. This study applies a quantitative approach using secondary data from annual financial reports. The population data was taken from 18 energy companies listed on the Indonesia Stock Exchange, while the sample selection was conducted using purposive sampling. The main phenomenon affecting the test results is the existence of incentives for highly profitable companies to engage in tax avoidance due to the potential for more significant tax savings. In addition, large companies usually have more resources and complex organizational structures, which give them more opportunities to carry out innovative and aggressive tax planning. It is hoped that this study can offer a fresh understanding of tax avoidance practices in the energy sector in Indonesia. The impact of this study is important for authorities to understand the relationship between corporate profitability, entity size, and tax avoidance practices, especially in the energy sector, which plays a strategic role. This understanding can assist in formulating more appropriate taxation policies to maintain economic stability and fiscal justice. The novelty of this research lies in its focus on business entities in the energy sector listed on the Stock Exchange from 2022 to 2024, which is a dynamic period marked by global commodity price fluctuations, changes in energy policy, and significant geopolitical challenges.

Islamic economic instruments in the Indonesian economic system play an important role, such as waqf which can provide many benefits to society. Waqf instruments continue to innovate, where previously they were limited to land or buildings, now there are waqf instruments in the form of money. However, cash waqf is considered to be still not optimal because the potential of existing waqf is very far from the waqf that can be collected. This study aims to determine whether there is an influence of attitudes, subjective norms, performance expectations and social influences on intentions to endow money. The population of this study is the Muslim community in the city of Semarang. By taking a sample of 150 respondents by purposive non-random sampling. The data collection used a Googleform questionnaire, the data analysis method used SEM (Structural Equation Model) based on the SmartPLS 3.0 application. The results showed that the research model used was valid and reliable so that it was used properly. Based on the hypothesis test, the result is that attitude has a positive and significant direct effect on the intention of cash waqf. Subjective norms have a positive and not significant direct effect on cash waqf intentions. Performance Expectation has a positive and significant effect on cash waqf intentions. Social influence has a positive and insignificant effect on cash waqf intentions. The conclusion from this study is that the higher the attitude factor in a person which comes from beliefs in behaviour, the higher the intention of cash waqf, and the higher the performance expectation factor which comes from the level of confidence in obtaining profits in behaviour, the higher the intention of cash waqf. Likewise, subjective norm factors originating from social pressure have no influence on cash waqf intentions and social influence factors originating from social pressure in perceiving the use of the system have no influence on cash waqf intentions.

Green accounting procedures have been adopted by numerous companies in response to the growing global focus on environmental responsibility. Nonetheless, monetary instability is still a major obstacle that can reduce productivity in Indonesia's manufacturing sector. The purpose of this research is to analyze industrial businesses listed on the Indonesia Stock Exchange from 2019 to 2023 and see how green accounting, financial crisis, and earnings management affect financial performance. The population in this study consists of 68 industrial sector companies, with a sample of 7 companies selected through purposive sampling based on 4 criteria. We used EViews software and Moderated Regression Analysis (MRA) for a quantitative approach. First, financial distress has a significant impact on financial performance. Second, green accounting has a significant positive effect on financial performance. Third, earnings management does not moderate the relationship between financial distress and financial performance. Fourth, earnings management does not moderate the relationship between green accounting and financial performance. With an Adjusted R-Square value of 79.73%, the study model has a high level of explanatory power. It may be used to explain the majority of the variation in financial performance. This shows that the constructed model is applicable and fits the empirical data well. Transparent reporting and real sustainability initiatives are still vital for improving company results, according to these results, as profits management methods do not change the impact of environmental and financial variables, which are important drivers of performance.

This study aims to investigate in detail the tax planning and implementation strategies applied by PT Unilever Indonesia Tbk in fulfilling its Corporate Income Tax (CIT) obligations. While taxes serve as a major source of government revenue, they also represent a financial burden for businesses that can impact net profits. Therefore, the implementation of a carefully designed tax planning approach is crucial to effectively manage tax liabilities while remaining compliant with existing legal regulations. The research employs a descriptive-analytical method, supported by a review of relevant literature and the use of secondary data obtained from taxation-related documentation. The study seeks to identify the tax planning protocols adopted by the company and assess their influence on the effectiveness of the firm’s tax-related financial expenditures. The findings reveal that PT Unilever Indonesia Tbk has successfully implemented tax planning strategies through the strategic utilization of deductible expenses as outlined in Article 6(1) of the Indonesian Income Tax Law, which includes expenditures for employee training, research and development activities, and corporate social responsibility (CSR) initiatives. This approach allows the company to legally reduce its tax obligations while enhancing its financial efficiency. The insights gained from this research are expected to serve as a framework for other organizations in developing tax planning policies that are not only effective and efficient but also sustainable in the long term.

Every year, companies are required to prepare financial reports that include information on their financial condition, performance, and cash flow. This report demonstrates management's accountability for the resources they manage. One of the most important elements in this report is profit. This profit figure is closely monitored by report users, as it is considered a key measure of management's achievements and performance. However, in their financial management, manufacturing companies often face problems related to earnings management practices. Earnings management is an attempt by company management to manipulate or arrange financial reports, especially profits, for specific purposes. This practice can be carried out to demonstrate better financial performance, meet market targets, or reduce tax burdens. The purpose of this study is to determine the determinants of earnings management, such as intellectual capital, inflation, and third-party funds. This study utilizes information taken from the financial reports of manufacturers listed on the Indonesia Stock Exchange (IDX) using a purposive sampling method that meets the exploratory steps. This research period was taken over three years, with 78 observations used from 26 manufacturing companies. This research method used Eviews 12 with secondary data types. The results of the study show that there is a positive influence between intellectual capital on profit management, and there is no influence of inflation on profit management, and third party funds do not have a significant influence on profit management..