Home Loan EMI Guide: Rates, Eligibility & Tax (2026)

A home loan is the single biggest financial commitment most Indians will ever sign, and most borrowers spend less time evaluating a Rs. 50 lakh 20-year loan than they do comparing phone plans. This guide covers everything that actually affects the total cost of your loan: how EMI is computed, the choice between fixed and floating rates, how bank eligibility formulas work, the tax breaks under Sections 24(b) and 80C, and the math of prepayment versus investing the surplus.

How home loan EMI is calculated

The standard EMI formula is:

EMI = P × r × (1+r)^n / ((1+r)^n − 1)

Where P is the principal, r is the monthly interest rate (annual rate ÷ 12), and n is the tenure in months. Each EMI is a fixed amount, but the internal split between interest and principal changes every month — the early years are interest-heavy, the later years principal-heavy. This is why a 20-year borrower who stops the loan in year 8 has paid roughly 40% of the interest but barely 15% of the principal.

A quick illustration

A 100 bps higher rate on the same 20-year Rs. 50 lakh loan costs an extra Rs. 7.8 lakh in interest. Shortening the tenure from 20 to 15 years saves Rs. 15.5 lakh — roughly 1/3 of the principal itself.

Fixed vs floating rate

Floating rate loans (the default for 95% of Indian home loans) are linked to an external benchmark — most public-sector banks use the RBI Repo Rate plus a spread. When the repo moves, your rate moves after the next reset cycle (usually quarterly). Tenure changes first; only if you ask, does the EMI change.

Fixed rate loans lock the rate for the full tenure or a specified initial period. They cost 100-150 bps more than floating but protect against rate hikes. In a cycle where rates are near the peak, floating almost always wins; near the bottom, fixed rate locks in a bargain.

Bank eligibility: how much you can actually borrow

Banks use two filters — FOIR (Fixed Obligations to Income Ratio) and LTV (Loan to Value):

• FOIR: Total EMIs (home + other loans + credit card minimum dues) usually cannot exceed 50% of net monthly income for most banks; 60% for some public-sector banks for higher-income borrowers.
• LTV: Loan as a percentage of property value — typically up to 90% for loans under Rs. 30 lakh, 80% for Rs. 30-75 lakh, and 75% for above Rs. 75 lakh (RBI guideline).

Real eligibility formula (approximate): Loan amount = (Net monthly income × 50% − existing EMIs) × EMI-to-loan multiplier. For a 20-year 8.5% loan, Rs. 1,000 of EMI supports roughly Rs. 1.15 lakh of principal.

Processing fees and other costs

• Processing fee: 0.25-0.5% of loan amount + GST; often negotiable or waived.
• Valuation and legal fees: Rs. 5,000-15,000.
• Stamp duty on mortgage: ~0.25% of loan amount (state-dependent).
• MODT/memorandum fees: Charged by lender for title deposit.
• Prepayment charges: Zero on floating-rate loans taken by individuals (RBI rule); up to 2% + GST on fixed-rate loans.

Tax benefits: 24(b) and 80C

For a self-occupied property:

• Section 24(b): Up to Rs. 2 lakh per year on home loan interest.
• Section 80C: Up to Rs. 1.5 lakh per year on principal repayment (shared with other 80C items).
• Stamp duty & registration in the year of purchase is also eligible under 80C.

For a let-out or deemed-let-out property, interest deduction under 24(b) is unlimited, but the overall "loss from house property" that can be set off against other income is capped at Rs. 2 lakh per year.

Prepayment strategy

The simple rule: prepay whenever your after-tax cost of the loan exceeds your after-tax return from alternative investments. For a 30%-slab borrower paying 8.5% on a self-occupied loan with full 24(b) benefit, the effective cost is roughly 6%. A diversified equity portfolio reasonably expects 10-12% long-term, so investing the surplus wins. For someone outside 24(b) benefit or under the New Regime, the effective cost is 8.5% and prepayment becomes more attractive.

If you do prepay, instruct the bank to reduce tenure, not EMI. Reducing tenure saves far more interest; reducing EMI mostly just frees up cash flow at the cost of longer payout.

Refinancing and balance transfer

If your current rate is more than 75 bps higher than the best available in the market, a balance transfer often makes sense. Banks want your business and frequently waive processing fees. Do the math on transfer cost + legal fees vs interest savings over the remaining tenure — break-even is usually 18-24 months. After 7-8 years into the loan, balance transfer rarely pays off because most interest has already been paid.