Quick reference
Why LTV is the central metric in mortgage lending
LTV quantifies the lender's risk. If a borrower defaults and the lender must sell the property to recover the loan, a lower LTV provides a larger buffer against a fall in property value. A 60% LTV loan on a 300.000 property means the lender has 120.000 of equity cushion — the property would need to fall 40% in value before the lender is at risk of a shortfall. A 90% LTV loan provides only a 30.000 cushion — a 10% fall in property value leaves the lender exposed.
This risk differential is reflected directly in mortgage rates. Most lenders set rate tiers at 60%, 70%, 75%, 80%, 85%, and 90% LTV. Each tier represents a step up in rate because of the higher risk. A borrower at 75% LTV might pay 0,3 to 0,5 percentage points more than a borrower at 60% LTV. On a 200.000 mortgage over 25 years, a 0,5 percentage point difference in rate costs approximately 15.000 in additional interest.
LTV also determines whether mortgage insurance is required. In the Netherlands, the Nationale Hypotheek Garantie (NHG) is available on mortgages up to 435.000 (2025 limit) and provides a government guarantee to the lender, enabling lower rates. In other countries, lenders mortgage insurance (LMI) or private mortgage insurance (PMI) is required above certain LTV thresholds, typically 80%, adding cost to the borrower rather than providing a benefit.
The LTV formula
How LTV changes over time
LTV is not static. It changes as the mortgage balance is paid down and as the property value changes. These two forces work together or against each other depending on market conditions.
As mortgage payments are made each month, the outstanding balance falls. On a 240.000 mortgage at 4% over 25 years, after 5 years the balance has fallen to approximately 208.000. If the property value stays at 300.000, the LTV has improved from 80% to 69,3%.
If property prices also rise — say by 15% over 5 years to 345.000 — the LTV falls further: 208.000 / 345.000 = 60,3%. This borrower has moved from an 80% LTV tier to a 60% LTV tier and may be eligible to remortgage at a significantly lower rate.
Conversely, if property prices fall — a scenario seen in many markets after 2008 and 2022 — LTV can rise even as payments are made. If the 300.000 property falls to 250.000 while the balance is still 230.000, the LTV is 92%. This borrower may be in negative equity or face difficulty refinancing at a reasonable rate.
Tracking LTV periodically — at least when a fixed-rate period ends — allows borrowers to identify when they have crossed into a lower rate tier and can refinance to save money.
Worked examples
LTV = 297.500 / 350.000 x 100 = 85%. This borrower is in the 85% LTV band. To reach the 80% band, additional deposit of: 350.000 x 80% = 280.000 mortgage, requiring 70.000 deposit. Extra deposit needed: 70.000 - 52.500 = 17.500. The rate saving of moving from 85% to 80% LTV is typically 0,1 to 0,25 percentage points — on 297.500 over 25 years, 0,2% saves approximately 8.500 in total interest.
Monthly payment: 240.000 x (0,002917 x 1,002917^300) / (1,002917^300 - 1) = 1.200. After 120 payments, outstanding balance is approximately 189.000 (the early payments are mostly interest). LTV: 189.000 / 300.000 = 63%. If property has also risen to 340.000: LTV = 189.000 / 340.000 = 55,6%. This borrower has entered the 60% LTV tier and can likely refinance at a better rate.
After some payments, say the balance has fallen to 185.000. But the property is now worth 175.000. LTV = 185.000 / 175.000 x 100 = 105,7%. This is negative equity — the mortgage exceeds the property value. The homeowner cannot sell without bringing additional cash to the table to cover the shortfall, and refinancing at a reasonable rate is effectively impossible until either prices recover or the balance falls below 175.000.
LTV Calculator
Enter your property value and mortgage amount to calculate your current LTV and see which rate tier you fall into.
Typical LTV rate tiers and impact
| LTV Band | Typical Rate Premium vs 60% LTV | Risk to Lender | Notes |
|---|---|---|---|
| Up to 60% | 0 bps (best rate) | Very low | Best available rates |
| 60-70% | +10 to 20 bps | Low | Minor premium |
| 70-75% | +20 to 40 bps | Low-medium | Common threshold |
| 75-80% | +30 to 60 bps | Medium | Significant step |
| 80-85% | +50 to 100 bps | Medium-high | Often requires higher fee |
| 85-90% | +80 to 150 bps | High | LMI may apply |
| 90-95% | +150 to 250 bps | Very high | Limited lender choice |
| Above 95% | Specialist only | Very high | Few mainstream lenders |
Common mistakes with LTV
Methodology
LTV calculated as outstanding loan divided by property value multiplied by 100. Rate tier premiums are illustrative ranges based on typical UK and European mortgage market structures and vary by lender, product type and market conditions. Netherlands NHG limit based on 2025 published figures.
LTV thresholds and rate structures vary significantly between lenders and countries. The tiers shown are illustrative. Always obtain specific rate quotes from lenders based on your actual LTV and credit profile.
Calculate your LTV
Enter your property value and mortgage amount to see your current LTV and which rate tier you fall into.
Frequently asked questions
Formula based on standard mathematical and financial methods. Results are for informational purposes. Last reviewed May 2026. Version 1.