What Is Deducted from Your Salary? How to Check Your Net Pay from a Payslip

Have you ever wondered why the amount deposited into your bank account is lower than the salary stated in your employment contract? For example, your monthly salary may be THB 30,000, but the amount you actually receive on payday is less than THB 30,000. This does not necessarily mean that your employer has calculated your salary incorrectly. Before paying employees, employers may need to calculate additional earnings and make various deductions, including personal income tax withholding, Social Security contributions, Provident Fund contributions, and other deductions related to employee benefits, agreements, or company policies.

These details are normally shown on your payslip, an important document that allows you to see how much you earned during each payroll period, what deductions were made, and how much net pay you ultimately received.

For HR teams, accurately calculating these figures every month is much more complicated than simply taking an employee’s base salary and subtracting a few deductions. Payroll calculations may involve attendance records, overtime, leave, additional earnings, taxes, Social Security, Provident Fund contributions, and individual employee conditions. Using payroll software or a payroll system integrated with HR software can therefore help reduce administrative work and minimize the risk of payroll errors.

This article explains what is deducted from your salary, how to read a payslip, and how to calculate net pay, helping both employees and HR teams understand payroll calculations with greater confidence.

Net pay, sometimes referred to as net salary or take-home pay, is the amount an employee actually receives after all applicable earnings and deductions for a payroll period have been calculated. As a result, net pay may differ from the employee’s contractual salary or base salary.

The basic calculation can be understood as:

Net Pay = Total Earnings – Total Deductions

Total earnings may include base salary, overtime pay, commissions, bonuses, allowances, and other forms of compensation provided under company policy. Deductions may include personal income tax withholding, Social Security contributions, Provident Fund contributions, and other applicable deductions.

Therefore, having a contractual salary of THB 40,000 does not necessarily mean that THB 40,000 will be deposited into your bank account every month. The actual amount received depends on both additional earnings and deductions applicable during that particular payroll period.

When reviewing a payslip, employees may find several types of salary deductions. The exact deductions can vary depending on income, employee benefits, company policies, and employment conditions. However, some of the most common deductions in Thailand include the following.

1. Personal Income Tax Withholding
One of the most common deductions shown on a payslip is personal income tax withholding. Employers are responsible for calculating and withholding applicable tax from employee income according to the requirements of Thailand’s Revenue Department.
Monthly payroll tax is not calculated simply by multiplying that month’s salary by a tax rate. Under Thailand’s withholding tax principles for employment income, employers generally estimate taxable employment income on an annualized basis, apply relevant expenses and deductions, calculate personal income tax according to the applicable rules, and then determine the amount of tax to withhold from each payment.
This is why two employees with the same salary may not necessarily have the same amount of tax withheld. Their eligible deductions and individual tax information may differ. The amount of tax withheld may also change during months in which an employee receives a bonus, additional income, or adjustments affecting the payroll tax calculation.

2. Social Security Contributions
Employees who are covered by Thailand’s Social Security system generally have Social Security contributions deducted from their wages according to the contribution rates and wage ceilings prescribed by applicable regulations.

Employees should therefore review their payslips to ensure that Social Security deductions correspond with the applicable contribution rules for that period. This is particularly important when contribution rates or wage ceilings are changed, as the amount deducted from an employee’s salary may also change.

For HR teams, keeping payroll calculations aligned with these requirements is essential because Social Security information is directly connected with monthly payroll processing. Using payroll software designed for Thailand can help organizations manage these calculations more systematically and reduce the administrative burden associated with manually updating payroll rules.

3. Provident Fund Contributions
If an employer provides a Provident Fund and an employee chooses to participate, part of the employee’s salary may be contributed to the fund according to the rates specified under the fund’s rules. The employer will generally make a corresponding employer contribution according to the applicable terms.

The employee contribution may therefore appear under the deduction section of the payslip, reducing the amount of net salary deposited into the employee’s bank account. However, this money has not simply disappeared; it is being accumulated in the Provident Fund to support the employee’s long-term savings and retirement objectives, subject to the fund’s conditions.

4. Deductions Related to Leave, Absence, or Attendance
In some circumstances, an employee’s salary may be adjusted due to unpaid leave, absence, or other attendance-related situations that affect wages. Whether an adjustment can be made depends on the type of leave, employment contract, work regulations, company policy, and applicable Thai labour laws. Employers should not assume that every case of leave, absence, or lateness can automatically result in a salary deduction.

This is another reason why Attendance, Leave Management, and Payroll systems should work together. If HR teams must manually transfer attendance and leave information into payroll software every month, the risk of missing information, duplicate entries, or incorrect calculations increases.

5. Other Deductions Based on Benefits or Agreements
In addition to statutory deductions, some organizations may have other deductions on employee payslips, such as employee cooperative contributions, certain group insurance contributions, employee loan repayments, or other deductions arising from benefits and relevant agreements.

For this reason, looking only at the amount deposited into a bank account may not provide the full picture. Employees should review their payslips every month to understand where their income comes from and why each deduction has been made.

To understand a payslip correctly, it is useful to divide the information into three main sections: Earnings, Deductions, and Net Pay. These three components are directly connected and explain how the final take-home amount is calculated.

Under Earnings, employees should review their base salary, overtime pay, bonuses, commissions, allowances, and any other additional income to ensure that the amounts correspond with the relevant payroll period. They should then review deductions such as personal income tax withholding, Social Security contributions, Provident Fund contributions, and other deductions before comparing the resulting amount with the Net Pay received.

Employees should also check personal and payroll information such as their name, employee ID, and payroll period. Payslips may be used as supporting evidence for financial transactions, loan applications, income verification, or other purposes, making the accuracy of this information important.

Suppose an employee has a monthly base salary of THB 40,000 and earns THB 3,000 in overtime during the month. The employee’s total earnings before deductions would therefore be THB 43,000.

If the payslip shows THB 1,000 in personal income tax withholding, THB 875 in Social Security contributions, and THB 2,000 in Provident Fund contributions, total deductions would equal THB 3,875. Based on this simplified example, the employee’s net pay would be:

THB 43,000 – THB 3,875 = THB 39,125

These figures are provided for illustrative purposes only and should not be treated as a universal tax or Social Security calculation. Actual amounts depend on factors such as individual income, wage bases, tax deductions and allowances, Provident Fund conditions, and regulations applicable at the relevant time.

The important point is not simply to look at how much money has been deposited into your account. Employees should be able to trace the calculation from total earnings – total deductions = net pay and understand the reason behind each item shown on their payslip.

Even if an employee receives the same base salary every month, their net pay can increase or decrease because payroll calculations involve much more than base salary alone.

For example, an employee may earn more overtime or commission in one month, while another month may include a bonus or other additional compensation. These earnings can affect payroll and tax calculations. Conversely, additional deductions, Provident Fund contributions, or payroll adjustments can reduce the amount of take-home pay.

If your net pay changes unexpectedly, the first step should be to compare your current payslip with the previous month’s payslip. Review both the Earnings and Deductions sections rather than looking only at the final amount deposited into your bank account.

If you believe that information on your payslip is incorrect, begin by checking the payroll period and cut-off dates. Overtime, travel expenses, commissions, or certain payroll adjustments may follow cut-off dates that differ from the end of the calendar month.

Next, review your attendance, leave records, approved overtime, additional earnings, and deductions. If something still appears incorrect, contact HR or the Payroll team and clearly identify the item you would like them to investigate. For example, saying, “My overtime amount does not match my approved hours,” or “My withholding tax is higher than last month,” gives HR a clearer starting point than simply reporting that your salary is incorrect.

For organizations, maintaining an audit trail of employee and payroll information is also important. An audit trail helps HR teams identify what information was changed, when it was changed, and who made the change, making payroll issues easier to investigate and resolve.

For a small organization, payroll may initially appear to involve little more than calculating salaries and deducting tax and Social Security contributions. As the workforce grows, however, payroll becomes significantly more complex due to different working schedules, overtime, leave, benefits, bonuses, commissions, funds, and individual employment conditions.

Payroll software helps organizations manage these components through a more structured process. This becomes particularly valuable when the payroll system is connected with HR software, Attendance, and Leave Management, allowing working hours, shifts, overtime, and leave information to flow into payroll processes without HR teams repeatedly transferring information between multiple spreadsheets.

Sprout One Payroll supports payroll-related processes including bonuses, commissions, Provident Fund contributions, deductions, additional earnings, Leave Management, reimbursements, benefits, and overtime management while supporting payroll requirements relevant to organizations operating in Thailand.

For HR teams, the benefit is not simply that payroll can be calculated faster. An integrated HR and payroll system can create a single source of truth for employee, attendance, leave, and payroll information, reducing duplicate data entry and making it easier to trace the source of figures shown on employee payslips.

A key strength of Sprout One is that it does not treat HR and Payroll as isolated systems. Instead, the platform is designed to connect employee information, leave, attendance, shifts, approvals, and payroll-related data within an integrated workflow. When source information changes, related HR processes can use the same connected data rather than requiring HR teams to manually move information between separate systems.

Sprout One also incorporates AI Agents into HR workflows, rather than positioning AI as a completely separate tool. For example, the Pre-Payroll Auditor can help identify potential anomalies involving attendance, overtime, and payroll adjustments before payroll is finalized. This gives HR teams an opportunity to identify and investigate potential issues before payslips are issued or salaries are paid.

This makes Sprout One suitable for organizations looking for more than standalone payroll software that calculates salaries at the end of each month. It provides an integrated environment that connects HR and Payroll processes from employee information and attendance to leave, approvals, and payroll processing.

Payslips contain personal, employment, and financial information about employees. The way an organization stores, distributes, and controls access to payslips should therefore be treated as a data protection matter rather than simply an HR administrative task.

Organizations should establish appropriate access controls, determine who is authorized to view payroll information, use suitable channels for distributing documents, and avoid unnecessary disclosure of employee data. An effective HR system should therefore support responsible employee data management and help organizations implement processes aligned with Thailand’s Personal Data Protection Act (PDPA).

Data security should be considered just as important as payroll calculation accuracy when selecting HR software or payroll software. Payroll systems process sensitive employee information every month, and a data breach can affect employees, organizational trust, and regulatory compliance.

The salary an employee actually receives may differ from the salary stated in their employment contract because net pay is calculated after taking into account earnings and applicable deductions. These deductions may include personal income tax withholding, Social Security contributions, Provident Fund contributions, and other relevant items. Reviewing your payslip every month can therefore help you understand where your money comes from and verify the accuracy of your payroll information.

From an organizational perspective, integrating payroll software, a payroll system, and HR software can reduce manual administrative work and minimize the risk of payroll errors. This is particularly important for organizations with large workforces, multiple locations, different work shifts, or complex compensation and benefits structures.

Sprout One is an all-in-one HR and Payroll platform designed to support workforce management in Thailand. It connects HRM processes including employee information, Leave Management, Attendance, and approval workflows with Payroll, while AI capabilities can help HR teams identify potential anomalies before payroll is finalized. The platform is designed to support Thailand-specific payroll requirements, including withholding tax, Social Security, Provident Fund, overtime, leave, and other relevant payroll components.

For organizations that prioritize PDPA, data security, Thai regulatory compliance, and efficient payroll management, Sprout provides a platform designed to make HR processes straightforward without unnecessary complexity. Sprout’s broader ecosystem brings together HRM, HRD, Payroll, Talent, and AI capabilities to help organizations manage the employee lifecycle through connected processes and data.

If your organization is looking for HR software, payroll software, or a payroll system that can help make salary calculations more accurate, employee data more secure, and HR operations more efficient, explore Sprout One and Sprout’s HR & Payroll solutions at sprout.co.th.

1. What is usually deducted from an employee’s salary in Thailand?
Common salary deductions in Thailand may include personal income tax withholding, Social Security contributions, Provident Fund contributions, and other deductions arising from employee benefits, agreements, or company policies. The exact deductions vary depending on the employee’s income, benefits, and employment conditions. Employees should therefore check their payslip every month to understand each deduction and confirm that the information is accurate.

2. How do you calculate net pay from a payslip?
The basic formula is Net Pay = Total Earnings – Total Deductions. Total earnings may include base salary, overtime, bonuses, commissions, allowances, and other income, while deductions may include withholding tax, Social Security, Provident Fund contributions, and other applicable items. The remaining amount is the employee’s net pay or take-home pay. Actual payroll calculations may be more complex depending on individual circumstances and applicable requirements.

3. Why is the salary deposited into my bank account different from the salary in my employment contract?
The salary stated in an employment contract generally represents the agreed salary or base salary, while the amount deposited into your bank account is usually your net pay after payroll calculations. Tax, Social Security, Provident Fund contributions, and other deductions can reduce the final amount. Conversely, overtime, bonuses, commissions, and other additional earnings can increase it. Your payslip provides the clearest breakdown of why the final amount differs from your contractual salary.

4. What information should I check on my payslip?
Employees should check important information such as the payroll period, base salary, additional earnings, overtime, bonuses, commissions, withholding tax, Social Security contributions, Provident Fund contributions, other deductions, and final net pay. These amounts should also be compared with actual attendance, approved overtime, and other relevant information for the payroll period. If something appears incorrect, employees should contact HR or Payroll for clarification.

5. How can payroll software help HR calculate salaries?
Payroll software helps HR teams process salary information systematically, including base salary, additional earnings, overtime, leave, deductions, tax, Social Security, Provident Fund contributions, and payslips. When a payroll system integrates with HR software, Attendance, and Leave Management, organizations can reduce duplicate data entry and the risk of human error. An integrated platform such as Sprout One connects HR and Payroll processes, helping organizations manage employee information and payroll more efficiently while strengthening data governance and security.