Home Loan Tax Benefit Calculator — Section 24(b) & 80C

Quick answer

For a self-occupied house, you can deduct home loan interest up to ₹2 lakh a year under Section 24(b) and claim principal repayment within the ₹1.5 lakh Section 80C limit, but only in the old tax regime. For a let-out house, the full interest is deductible against rent in both regimes. In the old regime, a resulting loss up to ₹2 lakh can reduce your salary income.

What this home loan tax benefit calculator does

A home loan can give you two separate tax benefits: one for the interest part of your EMI and one for the principal part. This calculator works out both and turns them into a rupee figure for the tax you save in a year.

It handles the two situations that are taxed very differently. If you live in the house yourself (self-occupied), it applies the ₹2 lakh interest cap and fits your principal into whatever room is left in your 80C limit. If the house is let out on rent, it calculates your income or loss from house property and shows how much of a loss can be set off against salary in the old regime.

The calculator uses the slab rate you choose plus 4% cess to convert deductions into tax saved. It is a planning tool: it tells you what the loan is worth to you in tax terms, so you can decide on regime, prepayment and how to declare the loan to your employer.

How to use the calculator, step by step

1. The house is — choose Self-occupied if you or your family live in it, or if it is vacant because you live elsewhere for work. Choose Let out on rent if it earns rent.
2. Interest paid this year — enter the interest portion of your EMIs for the financial year, as shown on the lender's interest certificate. Do not enter the full EMI.
3. Principal repaid this year — enter the principal portion of your EMIs for the year, also from the certificate.
4. Other 80C investments — enter everything else you claim under 80C, such as EPF, PPF, ELSS, life insurance and tuition fees. The calculator uses this to work out how much room is left for principal.
5. Rent received (if let out) — enter the yearly rent. Leave it at zero for a self-occupied house.
6. Your tax slab — choose 30%, 20% or 5%, which are the old-regime slab rates. Pick the highest rate that applies to your income.

For a self-occupied house, the result shows the yearly tax saving, the interest allowed under 24(b), the principal allowed within 80C and a note if your interest is above the ₹2 lakh cap. For a let-out house, it shows your taxable rent income, or your house property loss and how much of it you can set off this year.

How the calculation works

Self-occupied house

• Interest allowed = the lower of interest paid and ₹2,00,000.
• Principal allowed = the lower of principal repaid and the room left in 80C (₹1,50,000 minus your other 80C investments, but not below zero).
• Tax saved = (interest allowed + principal allowed) × slab rate × 1.04.

This is a flat-rate estimate. If the deductions move you into a lower slab, the real saving is slightly lower than this figure; for an exact number, compare full tax with and without the loan in the income tax calculator.

Let-out house

• Start with the rent received (annual value).
• Subtract a standard deduction of 30% of that value. This flat deduction covers repairs and maintenance; you cannot claim actual repair costs separately.
• Subtract the full interest paid. There is no ₹2 lakh cap on interest for a let-out house.
• The result is your income from house property. If it is negative, that is a loss.
• In the old regime, up to ₹2,00,000 of the loss can be set off against salary and other income in the same year. The tax saved on that set-off is shown at your slab rate plus cess. Any balance is carried forward for up to 8 years, to be set off only against future house property income.

The calculator treats the rent you enter as the annual value. If you pay municipal taxes on the house, the law lets you reduce the annual value by the municipal taxes actually paid during the year, before the 30% deduction. Reduce the rent figure you enter by that amount to reflect it.

Limits at a glance

The ₹2 lakh interest cap for a self-occupied house is a combined limit. Since FY 2019-20 you can treat up to two houses as self-occupied, but the total interest claimed for both stays within ₹2 lakh.

Note: the Income-tax Act, 2025 applies from tax year 2026-27 and renumbers these sections. This page and the calculator use the familiar section numbers (24(b), 80C) and the limits shown above.

Worked examples with real numbers

Example 1: interest above the cap

Vikram lives in his own flat. This year he paid ₹2,60,000 as interest and ₹1,20,000 as principal. His other 80C investments (EPF and insurance) total ₹60,000. He is in the 30% slab.

• Interest allowed = lower of ₹2,60,000 and ₹2,00,000 = ₹2,00,000
• 80C room left = ₹1,50,000 − ₹60,000 = ₹90,000
• Principal allowed = lower of ₹1,20,000 and ₹90,000 = ₹90,000
• Total deduction = ₹2,90,000
• Tax saved = ₹2,90,000 × 30% × 1.04 = ₹90,480

The extra ₹60,000 of interest and ₹30,000 of principal give him no tax benefit. The calculator flags the interest above the cap.

Example 2: 80C already full

Sunita is in the 20% slab. She paid ₹1,80,000 interest and ₹70,000 principal. Her EPF and PPF already use the full ₹1,50,000 of 80C.

• Interest allowed = ₹1,80,000
• 80C room left = nil, so principal allowed = nil
• Tax saved = ₹1,80,000 × 20% × 1.04 = ₹37,440

For Sunita, the principal part of her EMI brings no extra benefit. If she is thinking of prepaying, the tax angle does not favour keeping the loan longer; she should decide on interest cost alone.

Example 3: lower slab

Imran is in the 5% slab. He paid ₹1,50,000 interest and ₹60,000 principal, with ₹40,000 of other 80C investments.

• Interest allowed = ₹1,50,000
• 80C room left = ₹1,10,000, so principal allowed = ₹60,000
• Tax saved = ₹2,10,000 × 5% × 1.04 = ₹10,920

At a low slab, the same deductions save much less tax. Imran should check whether the new regime, with its larger rebate, gives him lower tax overall even without these deductions.

Example 4: let-out house with a loss

Deepa has let out a flat for ₹3,00,000 a year. She paid ₹4,50,000 interest on its loan and is in the 30% slab.

• Annual value = ₹3,00,000
• 30% standard deduction = ₹90,000
• Interest = ₹4,50,000 (no cap)
• Income from house property = ₹3,00,000 − ₹90,000 − ₹4,50,000 = loss of ₹2,40,000
• Set off against salary this year (old regime) = ₹2,00,000, saving ₹2,00,000 × 30% × 1.04 = ₹62,400
• Loss carried forward = ₹40,000

In the new regime, Deepa's interest still reduces her rental income to nil, but the ₹2,40,000 loss cannot be set off against her salary.

Example 5: let-out house with taxable rent

Karan receives ₹3,60,000 rent and paid ₹1,50,000 interest.

• 30% standard deduction = ₹1,08,000
• Income from house property = ₹3,60,000 − ₹1,08,000 − ₹1,50,000 = ₹1,02,000

This ₹1,02,000 is added to his other income and taxed at his slab rate, in either regime.

Example 6: a joint loan between spouses

Rahul and Priya own their flat 50:50 and are co-borrowers. This year the loan's interest was ₹4,40,000 and principal ₹2,00,000, paid equally. Both are in the 30% slab. Rahul's other 80C investments are ₹50,000; Priya's are ₹1,20,000.

• Each one's share of interest = ₹2,20,000, capped at ₹2,00,000 each
• Each one's share of principal = ₹1,00,000
• Rahul's 80C room = ₹1,00,000, so his full ₹1,00,000 principal is allowed. Tax saved = ₹3,00,000 × 30% × 1.04 = ₹93,600
• Priya's 80C room = ₹30,000, so only ₹30,000 principal is allowed. Tax saved = ₹2,30,000 × 30% × 1.04 = ₹71,760
• Combined saving = ₹1,65,360

If the loan were in Rahul's name alone, the interest would be capped at ₹2,00,000 for the whole family. Joint ownership with joint repayment lets each claim separately. Run the calculator once for each person with their own share.

What happens to a carried-forward loss

Deepa's ₹40,000 unabsorbed loss from Example 4 moves to the next year. It can only be set off against income from house property in future years, not against salary. If in a later year her rent exceeds her interest and the 30% deduction, that positive house property income absorbs the old loss first. She must file her return by the due date each year to keep the loss alive, for up to 8 years.

Conditions you must meet

For interest under Section 24(b)

• The loan must be for buying, constructing, repairing or renovating the house. A loan for some other purpose secured on the house does not qualify.
• For a self-occupied house, the full ₹2 lakh limit applies when the loan was taken on or after 1 April 1999 for purchase or construction and the construction or purchase is completed within 5 years from the end of the financial year in which the loan was taken. Otherwise the limit drops to ₹30,000.
• Interest on a loan for repairs or renovation is capped at ₹30,000, within the overall ₹2 lakh limit.
• Interest on loans from family or friends can also qualify, if it is genuinely paid and you have a certificate from the lender.

For principal under Section 80C

• The loan must be from a specified lender such as a bank, housing finance company, employer or certain other institutions.
• The deduction is for a residential house. It is generally available once construction is complete and you have possession.
• Stamp duty and registration charges also qualify under 80C in the year you pay them.
• If you sell the house within 5 years from the end of the financial year in which you got possession, all 80C deductions claimed for principal are added back to your income in the year of sale.

Special cases

Under-construction property

While the house is under construction, you cannot claim interest. Interest paid during this period (pre-construction interest) is added up and claimed in five equal parts, starting with the year in which construction is completed. For a self-occupied house, these instalments count within the ₹2 lakh yearly limit, along with the current year's interest.

The calculator works on interest for the current year. If you are claiming a pre-construction instalment too, add it to the interest you enter.

Joint home loans

When a house is bought jointly and both owners are also co-borrowers, each one can claim interest up to ₹2 lakh and principal within their own ₹1.5 lakh 80C limit, in proportion to their share. This can double the family's total benefit. Run the calculator separately for each co-owner with their share of interest and principal.

Living in a rented house while owning another

You can claim HRA exemption for the house you rent and home loan benefits for the house you own, if the facts are genuine. For example, you own a flat in one city but work and rent in another. Use our HRA calculator for the HRA part.

House lying vacant

If you do not live in the house and have not let it out, for example because you have moved to another city for work, it can usually be treated as self-occupied when it is one of your two chosen houses. The annual value is then nil and the ₹2 lakh interest limit applies, just as if you lived there. In the calculator, choose Self-occupied.

Top-up loans and refinancing

Interest on a top-up loan counts only if the money is used for buying, constructing, repairing or renovating the house, and you can show it. A top-up used for a car, a holiday or business does not qualify under 24(b). If you move your loan to another lender through a balance transfer, interest on the new loan used to repay the original home loan generally continues to qualify. Keep the documents linking the two loans.

Bought with a loan, but EMIs paid by someone else

The person claiming must be both the owner and the one repaying the loan. If a parent pays the EMIs on a house in your name, or you pay EMIs on a house you do not own, the claim can be questioned. Arrange ownership and repayment to match before you start claiming.

More than two self-occupied houses

Only two houses can be treated as self-occupied. If you own more and do not let them out, the others are treated as deemed let out, and a notional rent is taxed. This is a situation for expert advice.

Older first-time buyer deductions

Sections 80EE and 80EEA gave extra interest deductions to first-time buyers, but only for loans sanctioned in specific past periods and subject to value and other conditions. If your loan was sanctioned in those windows, check with an expert whether you can still claim them.

Principal on a let-out house

Principal repayment counts under 80C in the old regime whether the house is self-occupied or let out. The let-out mode of the calculator focuses on rent and interest, so if you also have principal on a let-out house, work out its 80C benefit using the self-occupied logic for principal alone.

Old regime vs new regime for home loan borrowers

For a self-occupied house, the new regime gives no benefit at all for interest or principal. So the question is whether these benefits, along with your other deductions, are large enough for the old regime to beat the new regime's lower rates and bigger rebate.

A home loan is often the deciding factor. Someone with ₹2 lakh interest, full 80C and HRA may find the old regime cheaper, while someone with only a small loan may not. The calculator shows what the loan is worth; the income tax calculator tells you which regime wins once everything is included.

For a let-out house the gap narrows, because the new regime still allows interest against rent. The difference is only in setting off a loss against salary, which the old regime permits up to ₹2 lakh.

Common mistakes to avoid

• Entering the full EMI as interest. Only the interest part counts under 24(b). Use the lender's certificate for the split.
• Claiming more than ₹2 lakh for a self-occupied house. The cap applies to the total for up to two self-occupied houses.
• Forgetting other 80C items. EPF and insurance often fill most of 80C, leaving little room for principal.
• Claiming interest during construction. It has to wait until completion and is then spread over five years.
• Claiming in the new regime for a self-occupied house. Neither interest nor principal is allowed there.
• Setting off a let-out loss in the new regime. The loss cannot reduce salary income in the new regime.
• Not declaring the loan to your employer. If you do not give the interest certificate, your employer deducts more TDS than needed, and you have to wait for a refund.
• Selling within 5 years. Remember that past 80C principal claims are reversed if the house is sold early.

Declaring the loan to your employer

If you choose the old regime with your employer, declare your expected interest and principal early in the year, using a provisional certificate from the lender. Your employer can then reduce your monthly TDS. A loss from a let-out house, up to ₹2 lakh, can also be considered by your employer in the old regime when you declare it with supporting details.

If you declare the new regime to your employer, the loan is ignored for TDS. You can still choose the old regime when filing your ITR, if you have no business income, and claim the benefits there. Any extra TDS is then refunded after processing.

Documents to keep

• Interest certificate from the lender for the financial year, showing interest and principal separately. A provisional certificate helps for declaring to your employer during the year.
• Loan sanction letter and disbursement details.
• Sale deed or allotment letter, and possession or completion certificate.
• Stamp duty and registration receipts, if claiming under 80C.
• For a let-out house: rent agreement, rent receipts or bank statements, municipal tax receipts and the tenant's details.
• For a joint loan: proof of ownership share and who paid the EMIs.

Salaried people should give the certificate to their employer with Form 12BB, so that the interest and any let-out loss are considered while deducting TDS under the old regime.

How this connects to your ITR

In the return, house property income or loss goes into the house property schedule. For a self-occupied house, the annual value is nil and the interest is entered as a deduction, giving a loss of up to ₹2 lakh. For a let-out house, you enter rent, municipal taxes and interest, and the 30% deduction is calculated automatically. Principal goes into the 80C section of the deductions schedule.

A carried-forward loss must be shown in the loss schedule every year until it is used up, and the return must be filed by the due date to carry a loss forward. ITR-1 has limits on the number of house properties and does not allow house property losses to be carried forward; with two houses or a carried-forward loss, ITR-2 is usually needed. Check the form rules on the income tax e-filing portal before you file.

Planning with your loan

Interest is highest in the early years of a loan, which is why the ₹2 lakh cap is often fully used at the start. As the loan ages, interest falls and principal rises. The tax benefit on interest then shrinks, while principal may be limited by your 80C room. Use our EMI calculator to see how your interest and principal split changes year by year.

When deciding whether to prepay, compare your loan's interest rate with the after-tax return on your other options. If you are already above the ₹2 lakh cap or in the new regime, the tax angle gives little reason to keep the loan running.

If you are buying a new house with a working spouse, think about ownership and repayment at the start. Making both of you owners and co-borrowers, with each paying a share of the EMI from their own income, allows two sets of limits. Changing ownership later is costly, so this decision is best made before registration.

Finally, review your 80C every year. As your EPF and insurance grow, there may be less room for principal. If the calculator shows that most of your principal is not being used, you are not missing a deduction you can get elsewhere: the ₹1.5 lakh limit is simply full.

Get it checked by an expert

Home loan claims depend on conditions like completion dates, ownership shares and the right ITR form. A TaxCaller expert can check your interest certificate, work out the best way to claim for each co-owner, compare both regimes and file your return with the right house property schedule. You are told the fee upfront before work begins, and the first call is free. See our income tax filing service.