Home Loan Tax Benefit Calculation: Steps for Both Regimes
Home loan tax benefit calculation for FY 2026-27: apply the ₹2 lakh and ₹1.5 lakh caps, work out tax saved by slab, compare both regimes and joint loans.
In this article
To calculate your home loan tax benefit, cap the interest at ₹2 lakh (self-occupied house, old Section 24(b), now Section 22), fit the principal into the ₹1.5 lakh limit (old Section 80C, now Section 123) after EPF and other items, then work out your old-regime tax with and without these deductions. Finally, compare that with your new-regime tax, which allows neither deduction for a self-occupied house. Figures are as of October 2026, FY 2026-27.
The step-by-step method
- Get the numbers. From the lender's final home loan interest certificate, note interest and principal for 1 April to 31 March. Add one-fifth of any pre-construction interest if possession came in the last five years.
- Cap the interest. Self-occupied: up to ₹2,00,000 (₹30,000 if the house was not completed within five years of the end of the borrowing year, or the loan is only for repairs). Let-out: full interest against rent.
- Fit the principal. Add principal, stamp duty (in the year paid), EPF, PPF, life insurance, ELSS and tuition fees. Only ₹1,50,000 of the total counts.
- Compute old-regime tax twice: with the home loan deductions and without them. The difference is what the loan saves you.
- Compute new-regime tax (no home loan deduction for self-occupied).
- Pick the lower of old-with-loan and new.
The tax rules used
| Old regime | New regime | |
|---|---|---|
| Standard deduction | ₹50,000 | ₹75,000 |
| Slabs | 0-2.5L nil; 2.5-5L 5%; 5-10L 20%; above 10L 30% | 0-4L nil; 4-8L 5%; 8-12L 10%; 12-16L 15%; 16-20L 20%; 20-24L 25%; above 24L 30% |
| Rebate | Up to ₹12,500, taxable income to ₹5L | Up to ₹60,000, taxable income to ₹12L |
| Self-occupied interest (Section 22) | Up to ₹2 lakh | Not allowed |
| Principal (Section 123) | Within ₹1.5 lakh | Not allowed |
| Health and education cess | 4% | 4% |
Quick estimate by slab
If the whole deduction stays inside one slab, saving = deduction × slab rate × 1.04.
| Old regime slab | Saving per ₹1 lakh deducted | Saving on full ₹3.5 lakh |
|---|---|---|
| 5% | ₹5,200 | ₹18,200 |
| 20% | ₹20,800 | ₹72,800 |
| 30% | ₹31,200 | ₹1,09,200 |
These are ceilings. Above ₹50 lakh of income, surcharge adds a little more; at the other end, the old-regime rebate already makes taxable income up to ₹5 lakh tax-free, so a deduction below that level saves nothing.
Worked example 1: ₹18 lakh salary
Anil earns a gross salary of ₹18,00,000. His EPF contribution is ₹60,000. In FY 2026-27 he pays ₹2,40,000 interest and ₹1,10,000 principal on his self-occupied flat.
Step 2-3: caps
- Interest allowed: ₹2,00,000 (₹40,000 lost)
- Section 123: ₹60,000 + ₹1,10,000 = ₹1,70,000, capped at ₹1,50,000. So only ₹90,000 of principal counts.
Step 4: old regime with the loan
Taxable income: ₹18,00,000 − ₹50,000 − ₹2,00,000 − ₹1,50,000 = ₹14,00,000.
Tax: ₹12,500 + ₹1,00,000 + 30% of ₹4,00,000 (₹1,20,000) = ₹2,32,500. With 4% cess: ₹2,41,800.
Old regime without the loan
Taxable income: ₹18,00,000 − ₹50,000 − ₹60,000 = ₹16,90,000.
Tax: ₹12,500 + ₹1,00,000 + 30% of ₹6,90,000 (₹2,07,000) = ₹3,19,500. With cess: ₹3,32,280.
Home loan saving in the old regime: ₹3,32,280 − ₹2,41,800 = ₹90,480. That matches the shortcut: ₹2,90,000 × 31.2%.
Step 5: new regime
Taxable income: ₹18,00,000 − ₹75,000 = ₹17,25,000.
Tax: ₹20,000 + ₹40,000 + ₹60,000 + 20% of ₹1,25,000 (₹25,000) = ₹1,45,000. With cess: ₹1,50,800.
Step 6: choose. The new regime is ₹91,000 cheaper than the old regime even with the home loan. The loan saves real tax inside the old regime, but not enough to beat the new slabs. For Anil, the old regime would only win with large extra deductions such as HRA. Our guide on home loan and HRA together shows a case where the combination does tip it.
Worked example 2: when the deduction crosses a slab
Pooja earns ₹12,00,000, with ₹60,000 EPF, ₹2,00,000 interest and ₹90,000 principal.
- Old regime without loan: ₹12,00,000 − ₹50,000 − ₹60,000 = ₹10,90,000. Tax: ₹12,500 + ₹1,00,000 + ₹27,000 = ₹1,39,500; with cess ₹1,45,080.
- Old regime with loan: ₹10,90,000 − ₹2,90,000 = ₹8,00,000. Tax: ₹12,500 + 20% of ₹3,00,000 (₹60,000) = ₹72,500; with cess ₹75,400.
Saving: ₹69,680, not the ₹90,480 a flat 31.2% would suggest. Only ₹90,000 of the deduction saved tax at 30%; the other ₹2,00,000 saved at 20%.
New regime: ₹12,00,000 − ₹75,000 = ₹11,25,000, which is under ₹12 lakh, so the rebate makes the tax nil. The new regime is clearly better for Pooja.
Worked example 3: joint loan
A couple, each earning ₹18,00,000 with ₹60,000 EPF, co-own their flat 50:50 and are co-borrowers. The loan's interest is ₹4,80,000 and principal ₹2,20,000 for the year.
| One spouse claims everything | Both claim 50:50 | |
|---|---|---|
| Interest claimed | ₹2,00,000 (₹2,80,000 lost) | ₹2,00,000 each (₹40,000 each lost) |
| Principal that fits Section 123 | ₹90,000 | ₹90,000 each |
| Old-regime saving | ₹90,480 | ₹90,480 each = ₹1,80,960 |
Splitting doubles the old-regime benefit. Each spouse still has to check whether the new regime is cheaper for them individually; regimes are chosen per person. Both must be co-owners as well as co-borrowers, and each should pay their share of the EMI from their own account.
Common calculation mistakes
- Counting the full EMI. Only the interest and principal parts count, and each has its own cap. A ₹4 lakh EMI total does not mean ₹4 lakh of deductions.
- Ignoring EPF. Your employee EPF contribution sits inside the same ₹1.5 lakh Section 123 limit, so principal often adds less than you expect. Check your payslip before assuming the full ₹1.5 lakh is free.
- Using the provisional certificate. Prepayments or rate changes during the year change the final interest figure. Use the final certificate when filing.
- Claiming before possession. Interest during construction is deferred into five instalments, and principal repaid before possession never counts.
- Comparing the wrong totals. The question is not how much the home loan saves in the old regime, but whether old-regime tax with every deduction is lower than new-regime tax. Example 1 shows a ₹90,480 saving that still loses to the new regime.
What the result tells you
- Low and middle incomes: the new regime's ₹12 lakh rebate and lower slabs often beat the old regime even with a full home loan claim.
- Higher incomes with HRA and a home loan: the old regime can still win, because the deductions add up to several lakh.
- Break-even is personal. At ₹25 lakh of salary, for example, the old regime needs about ₹8 lakh of deductions beyond the ₹50,000 standard deduction to match the new regime. Our new vs old tax regime guide shows how to find yours.
Plug your own numbers into our income tax calculator, and see the pillar on home loan tax benefits for every rule behind the caps.
Key takeaways
- Cap interest at ₹2 lakh (self-occupied) and fit principal into what is left of the ₹1.5 lakh Section 123 limit.
- Compute old-regime tax with and without the loan; the difference is your real saving.
- The slab shortcut (deduction × rate × 1.04) works only when income stays in one slab.
- In the examples, the loan saved ₹90,480 at ₹18 lakh and ₹69,680 at ₹12 lakh, yet the new regime was cheaper both times.
- Joint co-borrowers each get their own caps, which can double the old-regime saving.
Frequently asked questions
How do I calculate the tax benefit on my home loan?
Take the interest and principal from your lender's certificate, cap interest at ₹2 lakh for a self-occupied house and fit principal into the ₹1.5 lakh Section 123 limit with your other items. Then compute your old-regime tax with and without these deductions; the difference is your saving.
How much tax can I save on a home loan in the 30% slab?
If the full ₹2 lakh interest and ₹1.5 lakh principal are available and stay within the 30% slab, the saving is ₹3.5 lakh × 31.2% = ₹1,09,200 a year, including 4% cess. Most people save less because EPF already uses part of the ₹1.5 lakh limit.
Can I just multiply the deduction by my tax rate?
Only if your taxable income stays in the same slab after the deduction. If the deduction pulls income into a lower slab, part of it saves tax at the lower rate, so compute tax both ways.
Does a home loan save tax in the new regime?
Not for a self-occupied house. In the new regime, interest on a let-out house can reduce that property's rent to nil, but no loss can be set off against salary or carried forward.
Is the home loan tax benefit doubled for a joint loan?
It can be. Each co-owner who is also a co-borrower and pays the EMI gets their own ₹2 lakh interest cap and ₹1.5 lakh Section 123 limit under the old regime, so a couple can claim up to ₹7 lakh between them.
This article is for general education and is not personalised financial, tax or legal advice. Rates and rules are as of 21 Oct 2026; confirm current terms with your lender, AMC or a qualified adviser.
