The Overdraft Interest 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 overdraft interest figures and recalculate after changing an assumption. Use it to compare scenarios, then verify any current rate or fee before acting.
Calculate overdraft interest (OD) by overdraft amount and number of days
Calculation results
Interest OD/day
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Including interest
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All the money to be paid.
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Frequently asked questions
What is the interest rate on overdrafts at Thai Bank?
The overdraft interest rate (OD) of Thai Banks is generally 18-21% per year, which is higher than the general personal loan interest rate. The actual rate depends on the type of account and the amount approved by the bank.
What's the difference between an overdraft and a credit card?
Overdraft is a reserve linked to a running account, interest paid only on the actual amount used, like a credit card but without a period of accounting, interest calculated daily, while credit cards have an interest-free period of 45-55 days, but interest after that is very high.
Should I overdraft or take a personal loan?
For very short-term (a few days) money needs, overdraft may be more profitable because of the interest rate calculated on a daily basis, but if you need money for medium-long term, personal loans or cash debit cards may have lower interest rates. You should calculate the total cost before you decide.
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.
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.
Use this page to test a specific overdraft interest 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 overdraft interest estimate instead of relying on a generic example.
Build a baseline overdraft interest case with figures that match your situation.
Run a second overdraft interest case after changing the rate, period, quantity or other key assumption.
Record the difference between the two overdraft interest results and the input responsible for it.
Inputs for the overdraft interest estimate
For this overdraft interest 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 overdraft interest result is calculated
The calculator models principal, interest, repayment timing and term using the assumptions shown on the page. Reusing the same overdraft interest inputs will produce the same estimate, which makes the page suitable for controlled scenario comparisons.
Checks for a overdraft interest decision
Confirm any current rate, threshold or provider rule that could change the final amount. For overdraft interest, 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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