How to Calculate LTV (Loan-to-Value Ratio)
calendar_monthPublished 2026-08-16verified_userReviewed by Calculopedia editorial
When a bank prices a home loan, it isn't just asking how much you want — it's asking how much relative to what the property is worth. That ratio, the loan-to-value (LTV), is the single most important number in your loan's risk profile. It decides your interest rate, whether you need mortgage insurance, and even whether you qualify at all. And unlike your credit score, it's a number you control directly through one lever: your down payment.
The formula
LTV = loan amount ÷ property value × 100
The "value" used is the appraised or market value of the property, not the price you hope to pay. If a bank lends against a property, it wants the number an independent valuation supports — and that can shadow your purchase price, sometimes painfully.
Worked examples
Borrow ₹80,00,000 against a home worth ₹1,00,00,000:
LTV = 80,00,000 ÷ 1,00,00,000 × 100 = 80%
The flip side is your ownership stake: equity % = 100 − LTV. That ₹1 crore home at 80% LTV needs a ₹20 lakh down payment. Every extra ₹1 lakh of down payment is ₹1 lakh less of debt and a lower LTV — they're the same lever, viewed from two ends.
Now change one number and watch the ratio move. What if the property appraises lower than you agreed to pay? Suppose you signed at ₹1,00,00,000 but the appraiser values it at ₹95,00,000, and you still borrow ₹80,00,000:
LTV = 80,00,000 ÷ 95,00,000 × 100 = 84.2%
Same loan, same agreed price — yet your LTV jumped from 80% to over 84% purely because the appraised value fell short. This is the single most common way a deal sours at the last minute, and it's exactly why the formula uses value, not price.
What LTV means to lenders
| LTV | What it means |
|---|---|
| ≤ 60% | Low risk — best rates, easiest approval |
| 60–80% | Standard home-loan territory |
| 80–90% | Higher risk — may need insurance |
| > 90% | Very high risk — tough to refinance |
The lower your LTV, the more the lender can recover if things go wrong — so they reward you with lower rates. In India, the central bank's housing-loan norms set a general ceiling around 80% LTV for most home loans, so most banks keep borrowers at or below that line; anything above means a risk premium.
The 80% threshold and PMI
The 80% line deserves special attention because in many markets it's the point where private mortgage insurance (PMI) appears. Lenders use PMI to protect themselves against higher-risk (high-LTV) borrowers, and they typically stop requiring it once your LTV falls to 80% or below. That means the same property can carry an extra recurring cost at 81% LTV that disappears at 80%.
The practical takeaway: the last few percentage points of your down payment are often the most valuable. A 20% down payment that takes you to exactly 80% LTV can dodge both a rate step-up and a monthly insurance premium.
How LTV changes your monthly cost
LTV affects more than approval — it moves your rate. A lender may price an 80% LTV home loan a quarter to half a percentage point above a 60% LTV loan. On a ₹80 lakh, 20-year loan, the difference between 8.5% (EMI ≈ ₹69,426) and 9% (EMI ≈ ₹71,978) is about ₹2,550 a month — over ₹6 lakh across the loan — for exactly the same property. That single negotiation on your down payment beats most other rate-haggling you'll ever do.
Factor in a PMI-style premium at the higher LTV and the gap widens further. Over a 20-year term, being at 80% rather than 85–90% can easily be worth several lakh of rupees in steady monthly relief.
A quick comparison: down payment choices
Take a ₹1,00,00,000 property and see how the down payment reshapes the deal:
| Down payment | Loan | LTV | Typical effect |
|---|---|---|---|
| ₹40,00,000 (40%) | ₹60,00,000 | 60% | Best rates, no insurance |
| ₹20,00,000 (20%) | ₹80,00,000 | 80% | Standard, insurance not required at the line |
| ₹10,00,000 (10%) | ₹90,00,000 | 90% | Higher rate, insurance typically needed |
| ₹5,00,000 (5%) | ₹95,00,000 | 95% | Highest cost, hardest to approve |
Common mistakes
- Using the purchase price instead of the appraised value — LTV is computed on value; if the appraiser values lower than you paid, your LTV rises.
- Ignoring the jump near a threshold — an 81% LTV versus an 80% can step you into a worse pricing band and trigger insurance. An extra ₹1–2 lakh of down payment at that boundary is often the highest-return rupee you'll spend.
- Tapping equity back above 80% — a cash-out refinance or HELOC that pushes LTV above 80% typically attracts a higher rate and lender curbs.
- Forgetting that your LTV changes over time — as you repay principal and the property appreciates, LTV falls. Tracking it tells you the moment you can drop insurance or qualify for a better rate.
Key takeaways
- LTV = loan ÷ property value; equity % = 100 − LTV.
- Lower LTV → better rate, easier approval, fewer insurance requirements.
- 80% is a pivotal threshold — crossing below it typically ends insurance.
- Use appraised value, not purchase price.
- Your down payment is the control switch — more down, lower LTV.
Find your ratio with the LTV Calculator, and see how it relates to your ownership stake with the Home Equity Calculator.
FAQ
What is a good LTV ratio?
Below 80% is the standard comfort zone for home loans (most Indian lenders keep the ceiling there) — under 60% earns the best rates. Above 90% is high risk and hard to refinance.
How does a down payment affect my LTV?
A larger down payment shrinks the loan, which lowers LTV. A 20% down payment gives 80% LTV; a 40% down payment gives 60% LTV.
Can I refinance at a high LTV?
Yes, but you'll often face a higher rate, possibly insurance, and sometimes lender restrictions. Most lenders prefer 80% or lower for refinancing — which is why building equity matters before you try.
Why does my LTV change after I take the loan?
Two forces move it: your monthly EMI slowly pays down principal, and the property's value may rise. Both push your LTV down over time, which is why checking your ratio yearly can flag the moment to drop insurance or negotiate a better rate.