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Updated year criteria 2026
Savings Interest Calculator
The Savings 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 savings interest figures and recalculate after changing an assumption. Use it to compare scenarios, then verify any current rate or fee before acting.
Calculate interest on monthly savings accounts, including additional deposits, tax deductions, 15%. Shows annual totals.
Calculation results
Total Interest (Before Tax)
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Tax deductions at source (15%)
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Net interest
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Total
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Annual balance sheet (click to view)
Year
Accumulated deposits.
Accumulated interest (before tax)
net amount
How to calculate savings interest
A savings account pays interest on monthly capital, and the interest is added to the capital every month, making the amount grow exponentially.
Monthly Summary
New deposit = original deposit × (1 + r/12) + additional deposit Where r is the annual interest rate, monthly capitalization yields more than annual capitalization.
Savings tax.
Interest on savings accounts over the year in excess of 20,000 baht will be deducted from tax 15% All those who have interest not exceeding 20,000 baht per year are exempt
Frequently asked questions
How is interest on savings calculated?
The savings accounts pay interest on a monthly basis. The interest received each month is added to the principal to calculate the interest for the next period. This makes the total increase faster than calculating interest easily. Formula: New amount = Original amount × (1 + monthly interest rate)
Is interest on savings tax deductible?
The total savings interest for the year does not exceed 20,000 baht is tax exempt. If it exceeds 20,000 baht, tax will be deducted at the place of payment 15% all. This calculator calculates the tax 15% to show the minimum return actually received.
What is the difference between a special savings account and a regular savings account?
Special savings accounts usually pay interest rates higher than ordinary savings accounts, ranging from 2 to 3, but with conditions such as monthly withdrawals or minimum amounts. Some banks currently offer special savings accounts interest rates as high as 1.5-2% per year.
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.
Disclaimer: The calculations are estimates only. Actual interest rates may vary according to the terms of the bank. They are not financial advice.
English calculator guide
How to use the Savings Interest Calculator
Use this page to test a specific savings 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 savings interest estimate instead of relying on a generic example.
Build a baseline savings interest case with figures that match your situation.
Run a second savings interest case after changing the rate, period, quantity or other key assumption.
Record the difference between the two savings interest results and the input responsible for it.
Inputs for the savings interest estimate
For this savings 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 savings interest result is calculated
The calculator models principal, interest, repayment timing and term using the assumptions shown on the page. Reusing the same savings interest inputs will produce the same estimate, which makes the page suitable for controlled scenario comparisons.
Checks for a savings interest decision
Confirm any current rate, threshold or provider rule that could change the final amount. For savings interest, Use the result as a planning estimate and confirm any rate, rule or threshold that may have changed before acting. Check the important inputs and any current provider or authority rules before using the result for a decision.
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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