The Late Payment Penalties Calculator estimates a loan and interest estimate for your scenario from the quantities, rates, period, units and other assumptions requested on the page. Replace the example values with your own late payment penalties figures and recalculate after changing an assumption. Use it to compare scenarios, then verify any current rate or fee before acting.
Calculate default interest and penalties that will be incurred if the debt is late.
Calculation results
Interest default.
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Fees.
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Total payable.
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The default interest law in Thailand.
Under the Civil and Commercial Code Amendment Act (20th edition) 2014, default interest is set at a maximum of 7.5% per year, but private contracts may agree to a higher rate as permitted by the law. Consumers have the right to negotiate and request debt restructuring.
Frequently asked questions
What is the fine for defaulting on Thai debt?
Under the Consumer Protection Act and Commercial Procedure Code, default interest is not allowed to exceed the legal rate. Home loans usually charge an additional 1-3% from the normal rate. Credit card loans charge a maximum of 1.5% per month or 18% per year.
If I pay late 1 days is there a fine?
Depending on the terms of the contract, some have a 3-5 day grace period, some charge immediate fines. Most home loans charge default interest from the due date. Credit cards usually have a late payment fee of 100-300 baht per round.
How will a monthly fine affect your credit score?
Overdue payments over 90 days will be reported as NPLs, which will significantly reduce your credit score and may affect your ability to apply for new loans for 3-5 years. You should contact your financial institution to request debt restructuring before that.
Check before using results
Summary before deciding
This calculation result is suitable for preliminary planning. Actual figures should be checked from documents or official sources before making important decisions.
The calculation is based on the information you enter on this page.
Special cases may require additional information.
It is recommended to record or compare the results with the related tools below.
Disclaimer: The calculations are estimates. The actual fine depends on the terms of each institution's contract.
English calculator guide
How to use the Late Payment Penalties Calculator
Use this page to test a specific late payment penalties 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 late payment penalties estimate instead of relying on a generic example.
Build a baseline late payment penalties case with figures that match your situation.
Run a second late payment penalties case after changing the rate, period, quantity or other key assumption.
Record the difference between the two late payment penalties results and the input responsible for it.
Inputs for the late payment penalties estimate
For this late payment penalties calculation, check the quantities, rates, period, units and other assumptions requested on the page. The result is designed to show a loan and interest estimate for your scenario, not a guaranteed provider price or official decision.
How the late payment penalties result is calculated
The calculator models principal, interest, repayment timing and term using the assumptions shown on the page. Reusing the same late payment penalties inputs will produce the same estimate, which makes the page suitable for controlled scenario comparisons.
Checks for a late payment penalties decision
Confirm any current rate, threshold or provider rule that could change the final amount. For late payment penalties, Use the result to compare affordability, not as a lending offer. Check the lender’s effective rate, fees, insurance, payment schedule and approval conditions before committing. Check the important inputs and any current provider or authority rules before using the result for a decision.
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