Your mortgage rate determines how much you pay every month for years or even decades. Even a small difference in rate can add up to thousands of pounds over the life of a mortgage. Here is how to put yourself in the strongest possible position to secure the best deal.
What Determines Your Mortgage Rate?
Lenders set mortgage rates based on several factors, some within your control and some not:
- Bank of England base rate — This is the benchmark for UK interest rates. When the base rate rises, mortgage rates tend to follow. When it falls, lenders gradually pass on the savings.
- Loan-to-value (LTV) ratio — The lower your LTV, the less risk the lender takes on and the better the rate you are offered. Rates typically improve at 90%, 85%, 80%, 75%, and 60% LTV thresholds.
- Credit score — A strong credit history signals to lenders that you are a reliable borrower. This directly influences the deals available to you.
- Income and affordability — Lenders assess your income, monthly outgoings, and existing debts to ensure you can comfortably manage repayments.
- Type of mortgage — Fixed rates, tracker rates, and discount rates are all priced differently depending on market conditions and the lender’s appetite for risk.
Use our mortgage calculator to see how different rates affect your monthly repayments.
Fixed vs Variable Rates Explained
Understanding the main rate types helps you choose the right deal.
Fixed Rate
Your interest rate is locked for a set period — typically two or five years. Your monthly payment stays the same regardless of what happens to the base rate. This is the most popular choice among UK borrowers because it makes budgeting straightforward.
Standard Variable Rate (SVR)
This is the lender’s default rate, which you move onto when your introductory deal ends. SVRs are almost always significantly higher than fixed or tracker rates. Avoid staying on an SVR longer than necessary.
Tracker Rate
A tracker mortgage follows the Bank of England base rate plus a set margin. For example, base rate + 0.75%. Your payments go up and down as the base rate changes. Trackers can be cheaper than fixed rates when the base rate is low or falling.
Discount Rate
A discount off the lender’s SVR for a set period. Because the SVR itself can change, your payments are not guaranteed to stay the same — making these less predictable than trackers.
Improve Your LTV Ratio
Your loan-to-value ratio is one of the biggest factors in the rate you are offered. The more equity you have — or the larger your deposit — the better.
Lenders group rates into LTV bands. Crossing into a lower band can unlock noticeably cheaper deals:
| LTV band | What it means |
|---|---|
| 95% | Minimum deposit (5%), highest rates |
| 90% | Good improvement in available rates |
| 85% | Further improvement |
| 80% | Significantly better rates |
| 75% | Very competitive deals |
| 60% or lower | Best rates on the market |
If you are close to a threshold — say at 82% LTV — it may be worth saving a little more or overpaying your current mortgage to push below 80% before remortgaging. Check where you stand with our loan-to-value calculator.
Boost Your Credit Score
Lenders use your credit report to assess risk. A higher score opens the door to better rates. Here is how to improve yours:
- Check your credit report — Review your report with all three major agencies (Experian, Equifax, TransUnion) and dispute any errors. Even a wrong address can cause problems.
- Register on the electoral roll — This is one of the simplest ways to boost your score. Lenders use it to verify your identity and address.
- Reduce outstanding debt — Pay down credit card balances and avoid maxing out any credit lines. Aim to use less than 30% of your available credit.
- Avoid new credit applications — Each hard search leaves a mark on your report. Do not apply for new credit cards, loans, or overdrafts in the months before your mortgage application.
- Close unused accounts — Too many open credit accounts can count against you, even if they have zero balances.
- Make payments on time — A consistent track record of on-time payments is one of the strongest signals of creditworthiness.
For a deeper look at managing your credit, see our credit score guide.
Reduce Existing Debt
Lenders calculate your debt-to-income ratio when deciding how much to lend and at what rate. The less debt you carry, the more favourably they will view your application. Before applying for a mortgage:
- Pay off or reduce credit card balances.
- Clear small personal loans if possible.
- Avoid taking on any new finance agreements, including buy-now-pay-later.
Even closing a car finance agreement a few months early can make a significant difference to what you are offered.
Use a Mortgage Broker vs Going Direct
A whole-of-market mortgage broker searches across thousands of deals from hundreds of lenders. Key advantages include:
- Access to exclusive rates — Some deals are only available through brokers and are not offered to customers who go direct.
- Expert matching — A broker knows which lenders are most likely to accept your profile, reducing the risk of rejection and wasted credit searches.
- Time saving — Instead of comparing dozens of lenders yourself, a broker does the legwork.
- Fee-free options — Many brokers do not charge the borrower and are paid a commission by the lender instead.
Going directly to a bank or building society limits you to that one lender’s product range. Unless you already know exactly which deal you want, a broker will typically find you a better outcome.
Consider Shorter Fixed-Rate Periods
Five-year fixed rates offer long-term security, but two-year fixed rates are often cheaper. If you are comfortable reviewing your mortgage more frequently and do not mind the small hassle of switching every couple of years, a shorter fix can save you money.
However, weigh this against the risk that rates may be higher when you come to remortgage. In a rising rate environment, locking in for longer can provide valuable protection.
Time Your Application
Mortgage rates move with market expectations. While timing the market perfectly is impossible, a few practical steps can help:
- Apply early — Most mortgage offers are valid for three to six months. Locking in a rate early protects you if rates rise before completion.
- Watch the base rate — If the Bank of England signals rate cuts, waiting a few weeks could save you money. If hikes are expected, acting quickly makes sense.
- Shop around before your deal ends — Start comparing at least three months before your current rate expires to avoid being caught on the SVR.
Securing the best mortgage rate is not about luck. It comes down to preparation — building your deposit, cleaning up your credit, reducing debt, and working with the right adviser. Even a 0.25% improvement on a £200,000 mortgage saves roughly £500 a year. Over a 25-year term, the cumulative difference is substantial.
Use our mortgage calculator to compare deals and see how much you could save.