Calculate the difference and tax increase by the rate of the staircase 5-35%
It's for employees who have been promoted and need to plan financially.
Salary After Promotion Calculator
The Salary After Promotion Calculator estimates an income, tax or statutory-cost estimate for the figures entered from the income, employment or business status, relevant period, allowances and current thresholds shown on the page. Replace the example values with your own salary after promotion figures and recalculate after changing an assumption. Treat it as a planning estimate and independently verify the current rule or provider terms.
Fill in the current salary and the new salary after promotion. The system will show the difference and the tax impact.
Calculation results
Salary increase %
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Gross monthly margin
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Additional tax (approx./month)
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Net real increase/month
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Original tax/month (approx.)-
New tax/month (approx.)-
Gross annual difference-
How to calculate tax (estimate)
Use a simple formula: deduct the maximum expense 50% 100,000 baht/year + personal deduction 60,000 baht/year and calculate the ladder.
Salary and wages are calculated from the data entered, used for planning and preliminary checks before comparing with slips or documents from the employer.
Use tax base, social security, and standard terms of the tool.
Excluding benefits or company-specific agreements.
In case of dispute, check the employment documents and the latest labor laws.
Promotions in Thailand usually get a salary increase of 10-30% depending on the position level, industry and company policy.
How does a higher salary affect taxes?
Higher net income may lead to a higher tax ladder, resulting in higher value added tax rates. Plan for additional tax deductions.
How do you negotiate your salary when you get promoted?
Know the market rate of the new position in the industry and negotiate at least 15-20% up from the current salary.
Does the tax deduction increase when the salary increases?
Yes, employers must calculate and deduct new payroll taxes from higher wages, which may result in less net cash increase than expected.
What is the minimum wage for the year 2026?
The minimum wage in 2025-2026 in Bangkok and surrounding areas is 370-400 baht/day, in the provinces is 330-370 baht/day depending on the province. Check the latest rate from the Ministry of Labour mol. go. th
What is the net salary calculated from?
Net salary = Total salary - Tax deducted at place of payment - Social security contributions (5% maximum 875 baht) - Subsistence reserve fund (if any) Employer pays additional social security to the other party 5%
How does OT count?
Regular days: 1.5 times the normal hourly wage | Holidays: 2 times (regular hours) and 3 times (overtime) | Under the Labour Protection Act 1998
What's the benefit of a life insurance fund?
Long-term savings that employers contribute (1-15% of wages) + maximum tax deduction 15% of income or 500,000 baht + return on investment withdrawable when leaving work or retirement
Disclaimer: Tax results are a simple estimate, excluding special deductions. Use a tax calculator for more accurate figures.
English calculator guide
How to use the Salary After Promotion Calculator
Use this page to test a specific salary after promotion scenario. Enter your own values in the calculator above, review the units beside each field, and recalculate after changing an assumption. The result updates the salary after promotion estimate instead of relying on a generic example.
Build a baseline salary after promotion case with figures that match your situation.
Run a second salary after promotion case after changing the rate, period, quantity or other key assumption.
Record the difference between the two salary after promotion results and the input responsible for it.
Inputs for the salary after promotion estimate
For this salary after promotion calculation, check the income, employment or business status, relevant period, allowances and current thresholds shown on the page. The result is designed to show an income, tax or statutory-cost estimate for the figures entered, not a guaranteed provider price or official decision.
How the salary after promotion result is calculated
The calculator applies the displayed statutory rates, thresholds and allowances to the figures you enter. Reusing the same salary after promotion inputs will produce the same estimate, which makes the page suitable for controlled scenario comparisons.
Checks for a salary after promotion decision
Check the effective date and confirm current rules with the relevant Thai authority or a qualified adviser. For salary after promotion, Use the result to reconcile a payslip or plan take-home pay. Employer payroll rules, benefits, withholding and statutory contributions can change the final amount. Because this calculation can affect an important financial, legal or health decision, independently verify the inputs and current rules before relying on the result.
Language QA
Terminology, numeric values and calculator controls checked
Review formula structure, test cases, data sources, effective dates, and risk language accordingly.How to check our · There is no claim that an outside professional reviewed it. Unless the page directly states the name and qualifications. This content is therefore not individual advice.
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