The Interest Only Loans 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 only loans figures and recalculate after changing an assumption. Use it to compare scenarios, then verify any current rate or fee before acting.
Compare the installment and total cost of an IO loan with a regular loan.
Calculation results
Interest-Only Loans
IO intervals per month-
Backward IO/month-
Total Interest-
Normal loan.
instalment/month-
It's always the same.✓
Total Interest-
Who's the interest-only loan for?
The IO loan is suitable for real estate investors who buy to rent and plan to sell before the end of the IO period or those with unregular income but expect to have cash payments in the future. It is not recommended for long-term residential home buyers because the total cost is much higher.
Frequently asked questions
What is an interest-only loan?
Interest-Only Loans are interest-only loans with no down payments and fixed interest rates throughout the IO period. They are suitable for investors who need a high cash flow in the initial period or who expect to sell the asset within a specified time frame.
What are the disadvantages of an interest-only loan?
The main drawback is that the principal does not decrease during the IO period. At the end of the IO period, the loan will jump dramatically because of the shorter periods of repayment of both principal and interest, and the total interest over the contract is higher than for a normal loan.
Is there an interest-only loan in Thailand?
Interest-only loans are not common in Thailand, but many home loans have similar features, such as interest only payments in the first year or very low payments during the construction (pre-financing) and adjusted to normal when transferred.
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
Use the results to compare offers.
Installments and interest are numbers for preliminary screening of plans. Before actually applying, you should compare rates, fees, and conditions from service providers.
Calculated based on the principal, rate and term you enter.
This does not include certain types of fees, insurance or specific promotional conditions.
The total installment should not put pressure on monthly cash flow.
Disclaimer: The results of the calculations are estimates and are not financial advice.
English calculator guide
How to use the Interest Only Loans Calculator
Use this page to test a specific interest only loans 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 only loans estimate instead of relying on a generic example.
Build a baseline interest only loans case with figures that match your situation.
Run a second interest only loans case after changing the rate, period, quantity or other key assumption.
Record the difference between the two interest only loans results and the input responsible for it.
Inputs for the interest only loans estimate
For this interest only loans 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 only loans result is calculated
The calculator models principal, interest, repayment timing and term using the assumptions shown on the page. Reusing the same interest only loans inputs will produce the same estimate, which makes the page suitable for controlled scenario comparisons.
Checks for a interest only loans decision
Confirm any current rate, threshold or provider rule that could change the final amount. For interest only loans, 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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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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