In This Guide
How Mortgage Rates Work
Your mortgage rate is the interest your lender charges you for borrowing money to buy a property. It's expressed as a percentage of your outstanding balance and is the single biggest factor in determining your monthly payment — which is why getting the right advice matters.
On a £250,000 mortgage over 25 years, the difference between a 4% and 5% rate is roughly £150 extra per month — or £45,000 over the full term. So getting the right rate matters.
Mortgage rates are set by lenders, not directly by the Bank of England. However, the Bank of England base rate heavily influences what lenders charge. When the base rate falls, mortgage rates tend to follow — but not always immediately or by the same amount.
The Bank of England base rate changes over time, and mortgage rates tend to follow — though not always immediately or by the same amount. A broker can help you understand where rates sit right now and whether it's a good time to lock in a deal.
Types of Mortgage Rate
There are several different types of mortgage rate available in the UK. Understanding what each one means will help you choose the right deal.
Fixed Rate
Your interest rate stays the same for a set period — typically 2, 5, or 10 years. Your monthly payment is guaranteed not to change during this time, regardless of what happens to the base rate.
Fixed rates are the most popular choice in the UK. The split between 2-year and 5-year fixes shifts depending on market conditions — a broker can talk you through which term length makes sense for your situation.
Tracker Rate
A tracker mortgage follows the Bank of England base rate plus a set margin. For example, if your deal is base rate + 0.60%, your rate moves up or down automatically whenever the base rate changes. If the base rate drops by 0.25%, so does your rate.
Trackers give you transparency — you know exactly why your rate changes. Some tracker deals also have no early repayment charges, giving you flexibility to switch.
Discount Variable Rate
A discount rate is set at a fixed percentage below your lender's SVR for a set period. For example, SVR minus 2% for 3 years. The key difference from a tracker is that it follows the lender's SVR, not the base rate — and lenders can change their SVR at any time.
Standard Variable Rate (SVR)
Every lender has an SVR — it's their default rate. You move to this when your fixed or introductory deal ends. SVRs are set by each lender and can change at any time at their discretion. They're typically the most expensive option.
SVRs are typically much higher than the best fixed rates available — often nearly double. Sitting on your lender's SVR is one of the most expensive mistakes you can make. Always remortgage before your deal ends — we can help you switch well ahead of time.
Fixed vs Variable: Which Is Right for You?
This is the biggest decision most borrowers face. Here's how the two compare:
- Payment certainty — easier to budget
- Protection against rate rises
- Typically much cheaper than SVR
- Peace of mind for the full term
- Locked in if rates fall further
- Early repayment charges apply
- Often come with arrangement fees
- Less flexibility to switch
- Benefits immediately from base rate cuts
- Some trackers have no ERCs
- More flexibility to switch or overpay
- Can be cheaper if rates are falling
- Payments can go up if rates rise
- Harder to budget month-to-month
- Discount rates change at lender's discretion
- Risk of sudden payment increases
If you're a first-time buyer or on a tight budget, a fixed rate usually makes more sense. The certainty of knowing exactly what you'll pay each month is worth a lot — but the right choice depends on your circumstances. A quick chat with a broker can help you weigh up both options with real numbers.
2-Year Fix vs 5-Year Fix
A 2-year fix gives you the option to remortgage sooner — useful if you expect rates to fall. A 5-year fix gives you longer security and avoids remortgage costs for a longer period. The gap between 2-year and 5-year rates changes over time — we can show you exactly what each option costs right now so you can make an informed decision.
What Affects the Rate You're Offered
Not everyone gets the same rate. The rate you're offered depends on several factors, some of which you can control. A broker's job is to understand your full picture and match you with the lenders who'll offer you the best deal.
Loan-to-Value (LTV) Ratio
This is the single biggest factor. LTV is the percentage of the property's value that you're borrowing. A lower LTV (bigger deposit) means better rates.
- 60% LTV (40% deposit) — unlocks the very best rates
- 75% LTV (25% deposit) — a good step down in rate
- 85% LTV (15% deposit) — solid middle ground
- 90% LTV (10% deposit) — common for first-time buyers
- 95% LTV (5% deposit) — the minimum most lenders accept
The difference between the best and worst LTV bands can be over 1 percentage point — which on a typical mortgage adds up to hundreds of pounds a month. We can show you exactly what rates are available at your LTV right now.
If you can get your LTV to 60%, you'll unlock the very best rates. The difference between 60% and 95% LTV is significant — easily over £100 per month on a typical mortgage. Even a small increase in your deposit can move you into a better LTV band.
Credit History
A strong credit history gets you access to the best deals. Lenders look at your payment history, existing debts, credit utilisation, and how long you've had credit. Missed payments, defaults, or CCJs will limit your options and push your rate up.
Property Type
Standard houses attract the best rates. Flats (especially above commercial premises), new builds, non-standard construction, and high-rise properties may attract higher rates or be excluded from some lenders' best deals.
Employment Type
PAYE employees typically get the widest choice of deals. If you're self-employed, you'll usually need 2–3 years of accounts or SA302 tax returns. Contractors and those with complex income may face slightly higher rates or need a specialist lender — this is where a broker really earns their keep, as they know which lenders are most flexible.
Not sure what rate you could get? We'll check your options across 90+ lenders for free.
Finding the Right Rate
Mortgage rates change frequently — sometimes weekly. Rather than quoting numbers that could be out of date by the time you read this, here's what matters when comparing deals:
- The headline rate isn't everything. A lower rate with a large arrangement fee can cost more overall than a slightly higher rate with no fee.
- Best rates require lower LTVs. The deals you see advertised typically require a 60% LTV. Your actual rate depends on your deposit, credit history, and circumstances.
- Fixed, tracker, and SVR rates move differently. They don't all go up or down at the same time — so the best type for you depends on what the market is doing right now.
- Lender criteria vary hugely. Two lenders offering similar rates may have very different acceptance criteria. A broker knows which lenders suit your profile.
Don't just compare rates — compare the total cost of each deal over its full term, including fees. On smaller loan amounts, a fee-free deal at a slightly higher rate often works out cheaper. This is exactly the kind of calculation a broker does for you.
Want to know what rates you'd actually qualify for? We'll search across 90+ lenders and show you the real numbers.
What Happens When Your Deal Ends
When your fixed or introductory rate expires, you automatically revert to your lender's Standard Variable Rate. This is almost always significantly higher than the deal you were on.
The Cost of Doing Nothing
The jump from a competitive fixed rate to your lender's SVR can easily add £300–£500 per month to your payments — potentially thousands of pounds a year for no reason other than not switching to a new deal.
If your deal is ending soon (or has already ended), get in touch. We'll quickly show you how much you could save by switching.
Begin looking for a new deal at least 6 months before your current rate ends. Most lenders let you secure a new rate months in advance — so you can lock in a rate while keeping an eye out for better deals before completion.
Early Repayment Charges
If you want to leave your deal early (before the fixed period ends), you'll usually face an early repayment charge (ERC). These typically taper over the deal term:
| Year of Deal | Typical ERC | Cost on £250,000 |
|---|---|---|
| Year 1 | 5% | £12,500 |
| Year 2 | 4% | £10,000 |
| Year 3 | 3% | £7,500 |
| Year 4 | 2% | £5,000 |
| Year 5 | 1% | £2,500 |
Most lenders allow you to overpay by up to 10% of your balance per year without triggering ERCs. Once you move to the SVR, there are no early repayment charges at all.
How to Get the Best Rate
There are several things you can do to improve the rate you're offered — and a good broker will guide you through all of them:
- Maximise your deposit. Aim for at least 25% (75% LTV). If you can reach 40%, you'll access the very best rates.
- Improve your credit score. Pay bills on time, reduce existing debts, and avoid new credit applications in the 3–6 months before applying.
- Use a mortgage broker. A fee-free broker searches across 90+ lenders and calculates the true cost of each deal, including fees — so you don't have to.
- Compare total cost, not just rates. A lower rate with a £1,495 fee may cost more than a slightly higher rate with no fee. Your broker will work this out for you.
- Start early. Begin looking 6 months before your current deal ends. Lock in a rate and keep reviewing as completion approaches.
- Get your paperwork ready. 3 months of bank statements and payslips (or 2–3 years of accounts if self-employed) will speed up the process.
- Reduce existing debts. Paying off credit cards and loans before applying improves your affordability assessment.
- Don't go it alone. The mortgage market has thousands of products across hundreds of lenders. A broker narrows it down to the deals that actually suit you.
At Bright Box, we search across 90+ lenders to find the right deal for you — and we calculate the true cost of each option, not just the headline rate. Our advice is completely free — book a free call and let us take it from here.
