Home Loan Tax Benefit Calculator

How does the tool split a year into principal and interest?

It computes a fixed EMI from the loan amount, rate and tenure, then runs the schedule month by month. Each month’s interest is the outstanding balance times the monthly rate, the rest of the EMI repays principal, and the months in your chosen loan year are summed. Early years are interest-heavy and later years are principal-heavy.

What limits are built into the deductions?

The principal repaid in the chosen year is capped at ₹1,50,000 for the Section 80C line. The interest is capped at ₹2,00,000 for a self-occupied property and not capped for a let-out property. Both caps are the figures built into this tool, and the tool does not know how much of your 80C limit EPF, insurance or other items have already used.

How is the tax saved computed?

The two deductions are added, multiplied by the slab you pick (5%, 20% or 30%) and then multiplied by 1.04 for cess. For the default ₹50,00,000 loan at 8.5% for 20 years in year 1 the deductions are ₹2,99,511 and the saved tax is ₹93,448. It assumes the deduction reduces income that is actually taxed at that slab.

Why does a let-out property show a large deduction?

Because the tool applies no cap to let-out interest. It does not take rent as an input, so it cannot calculate the house-property loss or any limit on setting that loss off against other income. The income-from-house-property tool on this site handles rent, municipal tax and the 30% deduction, and the result here can overstate the saving when interest exceeds rent.

Does it apply to the new regime?

No. The tool’s note states that these deductions are old-regime items, and the calculation has no regime switch. If you are in the new regime the saving shown is not applicable; check the rules for self-occupied and let-out property in the regime you choose.

What happens with zero interest or odd tenure?

A rate of 0% gives an EMI equal to loan ÷ months and no interest: a ₹20,00,000 loan over 10 years shows ₹16,667 a month and ₹2,00,000 of principal in year 2. A cleared rate box counts as 0%, which is this 0% case, and a tenure of 0, which is also what a cleared box becomes, falls back to 20 years. Tenure is rounded to whole years.

What costs and conditions are not modelled?

Pre-construction interest, joint borrowers sharing the deduction, prepayments, rate changes on floating loans, stamp duty and registration, processing fees and any additional interest deduction for specific schemes are not included. The tool assumes a constant rate and a single fixed EMI for the whole tenure.