The Interest on Overdue Invoices 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 interest on overdue invoices figures and recalculate after changing an assumption. Use it to compare scenarios, then verify any current rate or fee before acting.
Enter the Invoice amount, interest rate and number of days outstanding to see the interest and total amount due.
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.
The Thai Commercial and Civil Code stipulates that default interest rate is 7.5% per year (formerly) and may now be adjusted to 5% + reference rate or as specified in the contract, but not exceeding the maximum stipulated by law.
Can you charge interest on the debt?
You can figure out in the contract or invoice in advance, you have to clearly state how much interest is due per year or per month, and when it begins to be charged.
Interest repayment, simple or multiplied?
Generally, the interest is calculated as simple interest without capital increase, according to the principles of Thai civil and commercial law, unless otherwise agreed.
What is compound interest?
Interest calculated from principal plus accumulated interest makes money grow faster than ordinary interest. Formula: A = P(1+r/n)^(nt) where P=principal, r=interest rate, n=multiplications per year, t=number of years
What is the rule 72 used to calculate?
Use an estimate of the number of years that money will increase in 2 times: Number of years = 72 ÷ interest rate. For example, interest 6% per year money will be 2 times in 72÷6 = 12 years A simple rule for financial planning
What is the current interest rate on savings deposits in Thailand?
General savings are at 0.5-1.0% per year Regular deposits are at 12 months at 1.5-2.5% per year Special savings accounts are at 1.5-3% Check current rate from Bank of Thailand bot. or. th
Is interest on deposits taxable?
Yes, interest on bank deposits is tax deductible at the point of payment 15% by the bank except interest on savings deposits not exceeding 20,000 baht per year combined on all accounts can be claimed back or credited with tax at the end of the year.
Disclaimer: This calculation is an estimate. The actual interest rate applied must be as specified in the contract and applicable law.
English calculator guide
How to use the Interest on Overdue Invoices Calculator
Use this page to test a specific interest on overdue invoices 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 interest on overdue invoices estimate instead of relying on a generic example.
Build a baseline interest on overdue invoices case with figures that match your situation.
Run a second interest on overdue invoices case after changing the rate, period, quantity or other key assumption.
Record the difference between the two interest on overdue invoices results and the input responsible for it.
Inputs for the interest on overdue invoices estimate
For this interest on overdue invoices 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 interest on overdue invoices result is calculated
The calculator models principal, interest, repayment timing and term using the assumptions shown on the page. Reusing the same interest on overdue invoices inputs will produce the same estimate, which makes the page suitable for controlled scenario comparisons.
Checks for a interest on overdue invoices decision
Confirm any current rate, threshold or provider rule that could change the final amount. For interest on overdue invoices, Use the estimate to plan a household or service cost. Actual charges can differ because of provider tariffs, minimum fees, taxes, location and billing-period adjustments. Check the important inputs and any current provider or authority rules before using the result for a decision.
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