What is Loan-to-Value (LTV)? How it Impacts Mortgage Rates

If you have started looking at mortgage deals online, you have likely run into the acronym “LTV.” Loan-to-Value is one of the most critical metrics used by UK financial institutions. It directly dictates the interest rates you qualify for, the size of the deposit you need, and whether a lender will approve your application at all.

Understanding how LTV is calculated and learning how to lower it can save you tens of thousands of pounds over the lifetime of your mortgage.

What Exactly is Loan-to-Value?

Loan-to-Value is the percentage ratio of the property’s value that you are borrowing as a mortgage, compared to its total purchase price. The remaining percentage is covered by your cash deposit.

The math is straightforward:

The Loan-to-Value (LTV) Formula:

LTV =
Mortgage Loan Amount Property Value
× 100
For instance, if you are purchasing a flat valued at £200,000 and you put forward a cash deposit of £20,000, you require a mortgage loan of £180,000. In this scenario, your LTV is
 

The LTV “Tiers” and Why They Matter

 
Lenders group their mortgage products into distinct LTV brackets, usually moving in 5% increments (e.g., 95%, 90%, 85%, 80%, 75%, down to 60%).

The higher your LTV ratio, the riskier you look to a bank. If property prices decline slightly, a buyer with a 95% LTV could quickly fall into negative equity (where the home is worth less than the remaining loan balance). To cover this risk, lenders charge higher interest rates on high-LTV tiers.

The cheapest, most competitive rates on the market are unlocked once you reach an LTV of 60% or lower (meaning you have a 40% deposit or equity stake).

How to Lower Your LTV Ratio

  1. Save a Larger Deposit:
    Delaying your purchase by a few months to save a bit more cash can drop you into a lower tier, saving you money on interest.

  2. Negotiate a Lower Purchase Price:
    If a property survey highlights defects, renegotiating the price drops the required loan amount, instantly lowering your LTV.

  3. Overpay Your Existing Mortgage:
    If you already own your home, making extra repayments reduces the principal loan balance, dropping your LTV when it comes time to remortgage.

Before looking at property listings, it is incredibly helpful to map out your target ratios. Use our mortgage calculator to test how shifting your deposit size alters your loan requirements. Visualizing these numbers gives you a clear target for sliding down into a more affordable interest bracket.

Try our Free Mortgage & Stamp Duty Calculator