Two people with the same salary can get approved for very different home loan amounts. That is because banks don't just look at your income — they run it through a formula involving existing debt, tenure, interest rate, and credit score to arrive at the maximum EMI you can safely afford, and then reverse-calculate the loan amount from that EMI. Understanding this formula lets you predict your eligibility before you apply.
The Core Concept: FOIR
Most Indian banks use FOIR (Fixed Obligation to Income Ratio) to decide how much of your monthly income can go toward EMIs:
FOIR (%) = (Total Existing EMIs + Proposed New EMI) ÷ Net Monthly Income × 100
Banks typically cap FOIR at 40-50% of net monthly income for salaried applicants, and slightly lower (30-40%) for self-employed applicants due to income variability. If your FOIR would exceed this cap with the new home loan EMI added, the bank will either reduce the loan amount or extend the tenure to lower the EMI.
Step-by-Step: How Eligibility Is Calculated
- Determine maximum allowable EMI: Net Monthly Income × Maximum FOIR% − Existing EMIs
- Reverse-calculate loan amount from that EMI using the standard EMI formula, based on the interest rate and tenure offered
- Apply Loan-to-Value (LTV) cap: banks fund a maximum of 75-90% of the property value depending on the loan amount slab (RBI guidelines), so your eligibility is also capped by the property price itself
- Adjust for credit score: a CIBIL score below 700 often triggers a lower FOIR cap, a higher interest rate, or outright rejection, while a score above 750 typically gets the best rate and full FOIR allowance
The EMI Formula Used in Reverse
EMI = [P × R × (1+R)^N] ÷ [(1+R)^N − 1]
Where P = principal, R = monthly interest rate, N = tenure in months. Banks solve this formula backward: they fix the maximum EMI you can afford and the interest rate/tenure, then solve for the maximum principal (P) they will lend.
Worked Example
Suppose your net monthly income is ₹1,20,000, you have an existing car loan EMI of ₹12,000, and the bank applies a 50% FOIR cap at an 8.5% annual interest rate for a 20-year tenure.
- Maximum total EMI allowed = ₹1,20,000 × 50% = ₹60,000
- Maximum new home loan EMI = ₹60,000 − ₹12,000 (existing EMI) = ₹48,000
- Solving the EMI formula backward for P at R = 0.7083% monthly and N = 240 months gives a maximum eligible loan of approximately ₹57,00,000
If you had no existing car loan, the full ₹60,000 EMI capacity would raise your eligible loan amount to roughly ₹71,00,000 — showing how much existing debt reduces borrowing power.
Factors That Change Your Eligibility
| Factor | Effect on Eligibility |
|---|---|
| Higher net monthly income | Increases eligible loan amount |
| Existing EMIs (car, personal loan) | Directly reduces available EMI capacity |
| Longer tenure | Lowers EMI, increases eligible loan amount (but raises total interest paid) |
| Higher interest rate | Reduces eligible loan amount for the same EMI |
| CIBIL score below 700 | May reduce FOIR cap or increase interest rate |
| Co-applicant with income | Combines incomes, can significantly raise eligibility |
How to Improve Your Eligibility
Adding a co-applicant's income (spouse or parent) combines both incomes for FOIR calculation, often the single biggest lever. Paying off or reducing existing EMIs before applying frees up FOIR headroom. Opting for a longer tenure lowers the EMI and raises eligibility, though it increases total interest paid over the loan's life — a trade-off worth calculating explicitly rather than assuming longer is always better. Check your specific numbers instantly with our Home Loan Eligibility Calculator before you approach a lender.
Frequently Asked Questions
Q: Why did two lenders quote me different eligible loan amounts for the same income? A: Each bank sets its own FOIR cap, interest rate, and risk policy, so a bank with a 50% FOIR cap will approve a higher loan amount than one capping FOIR at 40%, even for identical income and existing EMIs.
Q: Does a longer tenure always increase my eligible loan amount? A: Yes, because a longer tenure reduces the EMI for the same principal, allowing a larger loan to fit within your FOIR-capped EMI limit, though most banks cap maximum tenure at 30 years or until the borrower turns 65-70.
Q: How much does a low CIBIL score actually reduce eligibility? A: A score below 700 can lead to a 0.25-0.75% higher interest rate and sometimes a lower FOIR cap, both of which directly reduce the loan amount a bank will approve compared to an applicant with a score above 750.
