Fixed rate mortgages how they work

A fixed rate mortgage is a home loan where your interest rate stays the same for a set period, regardless of changes to the Bank of England base rate or your lender's standard variable rate. This means your monthly payments are predictable for as long as the fix lasts.

The fixed period, sometimes called the introductory phase, typically lasts 2 to 5 years, though some lenders offer terms of up to 10, 15, or even 25 years. Whatever length you choose, your rate and payments won't change until the fix ends.

Your home may be repossessed if you do not keep up repayments on your mortgage or any other debt secured on it.

According to UK Finance, around 85% of all outstanding mortgages in the UK are fixed rate deals, making them by far the most popular choice for both first-time buyers and those remortgaging.

How fixed rates differ from variable rates

With a variable rate mortgage, your interest rate can go up or down based on market conditions. This includes tracker mortgages, which follow the Bank of England base rate plus a set margin, and your lender's standard variable rate (SVR), which the lender can change at its own discretion.

The key difference is predictability. A fixed rate gives you certainty about your payments, while a variable rate could work out cheaper when rates are falling but more expensive if they rise.

When you take out a fixed rate mortgage, your lender agrees to charge a specific interest rate for an agreed period, known as the initial period. During this time, typically 2 to 5 years, the rate stays unchanged, so your monthly payments remain the same.

Once the initial period ends, your mortgage usually switches to your lender's standard variable rate (SVR) unless you arrange a new deal beforehand. Because the SVR can move up or down at any time, your payments become far less predictable once you're on it.

The fixed rate period

Fixed terms typically come in the following lengths:

• 2-year fixed rate: the shortest common option. You'll need to remortgage or switch deals more frequently, but you keep the flexibility to review your situation sooner.
• 3-year fixed rate: a middle ground between short and medium-term fixes. Less common than 2 or 5-year deals, but available from most lenders.
• 5-year fixed rate: the most popular choice for those wanting longer stability, giving you five years without needing to think about remortgaging.
• 10-year fixed rate: for maximum long-term security. Rates are typically higher than shorter fixes, but you're protected for a decade. Some lenders now offer 15-year or even 25-year fixes.

What happens when your fixed rate ends

When your fixed rate deal ends, you'll automatically move onto your lender's standard variable rate (SVR) unless you arrange a new mortgage deal. The SVR is almost always significantly higher than your fixed rate, which means your monthly payments could increase substantially if you don't act.

You can typically start shopping for a new deal up to six months before your current fix ends. This lets you lock in a new rate without paying an early repayment charge.

Mortgage rates move up and down over time as market conditions change, so it's best to speak to an advisor for current, accurate figures rather than relying on published examples that may be out of date. That said, several factors consistently affect the rate you'll be offered:

• Loan-to-value (LTV): the percentage of your property's value you're borrowing. A lower LTV, from a bigger deposit or more equity, typically means a more competitive rate.
• Loan amount: some lenders set a minimum loan amount for certain fixed rate products, so the size of your borrowing can affect which deals you're eligible for.
• Credit history: lenders reserve their most competitive rates for borrowers with a clean credit history. Missed payments, defaults, or County Court Judgments will limit your options and increase your rate.
• Income and affordability: a higher income relative to your borrowing typically opens up better deals, and some lenders offer preferential rates for higher earners.
• Employment status: self-employed borrowers may face slightly higher rates or fewer options compared to those in permanent employment.
• Property type: standard properties usually attract better rates than flats, new builds, or non-standard construction.

Moving into a lower loan-to-value bracket, for example by increasing your deposit even slightly, can move you into a more competitive pricing tier.

Understanding the total cost of your mortgage means looking beyond the interest rate alone. Fees can significantly affect which deal is actually cheapest for your situation.

Arrangement fees

Also called product fees or completion fees, this is what the lender charges to set up your mortgage. Common arrangement fees range from £0 to around £1,999, though the exact amount varies by lender and product.

An arrangement fee can usually be paid upfront or added to your mortgage balance. If you add it to the balance, it will accrue interest over the term, increasing the total cost.

Lower interest rates often come with higher arrangement fees. Whether paying a higher fee for a lower rate saves you money depends on your mortgage size and how long you plan to keep the deal, so it's worth asking an advisor to compare the total cost of each option rather than just the headline rate.

Early repayment charges (ERCs)

If you want to pay off your mortgage early, switch deals, or move home before your fixed period ends, you'll usually face an early repayment charge.

ERCs typically range from 1% to 5% of your outstanding balance, and they often reduce the longer you've held the mortgage. On a £200,000 mortgage, for example, a 3% ERC would cost £6,000.

Most lenders let you overpay up to 10% of your balance each year without triggering an ERC. Check your mortgage terms before making extra payments.

Advantages of fixing your rate

• Payment certainty: you know exactly what you'll pay each month for the duration of your fix, which makes budgeting and financial planning much easier.
• Protection from rate rises: if the Bank of England raises interest rates, your payments stay the same.
• Reduced financial stress: without needing to track every base rate decision, many borrowers find fixing less stressful.
• Easier to plan long-term: particularly useful if you're stretching your budget to buy, or if you have a fixed income such as a pension.

Disadvantages of fixing your rate

• Miss out if rates fall: if interest rates drop during your fix, you can't benefit until your fixed period ends or you pay an ERC to exit.
• Early exit costs: leaving your fix early, whether to remortgage, move home, or pay off your mortgage, usually incurs a substantial charge.
• May cost more initially: fixed rates sometimes start higher than tracker or variable rates, as you're paying for the security of a guaranteed rate.
• Less flexibility: unlike SVR mortgages, which you can typically leave at any time, fixed rates lock you in for the agreed period.
• Need to remortgage regularly: you'll need to arrange a new deal before each fix ends to avoid falling onto the more expensive SVR.

Fixed rate mortgages suit most borrowers, but they're particularly valuable in certain situations.

Fixed rates work well for

• First-time buyers: when you're new to homeownership and potentially stretching your budget, knowing your payments won't increase gives valuable security.
• Anyone on a tight budget: if rate rises would put pressure on your finances, fixing protects you from payment shocks.
• Those who value certainty: if you prefer predictability and find the idea of fluctuating payments stressful, the reassurance from fixing is worth the potential trade-off.
• Borrowers expecting rates to rise: if you believe interest rates will increase during your mortgage term, locking in now makes sense.
• People planning to stay put: if you're unlikely to move home during the fixed period, you won't need to worry about early repayment charges.

Fixed rates may not suit

• Those expecting to move soon: if you might sell your home within 2 to 3 years, early repayment charges could be costly. Consider a shorter fix or check if your mortgage is portable.
• Borrowers expecting a large windfall: if you're anticipating an inheritance, bonus, or other lump sum you want to put towards your mortgage, the 10% overpayment limit and ERCs could be restrictive.
• Those confident rates will fall: if you strongly believe interest rates will decrease significantly, a tracker might save money, but this is a gamble.
• Anyone who needs flexibility: if your circumstances might change, a mortgage without ERCs could be more suitable, even at a higher rate.

Choosing between a 2-year, 5-year, or longer fix depends on your personal circumstances, risk tolerance, and view on interest rates. Getting the length right can make a meaningful difference to your finances, so it's worth thinking it through rather than defaulting to whatever your lender suggests.

What the experts say

No one can predict how mortgage rates will move with certainty, and the future direction of rates is always uncertain. Borrowers who fix for longer are sometimes protected from unexpected rises, while at other times a shorter fix would have worked out cheaper.

Rather than trying to time the market, it's usually better to choose your fix length based on your own need for certainty versus flexibility, and to speak to an advisor about how your circumstances affect the decision.

Getting a fixed rate mortgage follows a similar process whether you're buying a home or remortgaging an existing one.

If you already have a mortgage, remortgaging to a new fixed rate deal can save you money, particularly if you're on or approaching your lender's SVR. Remortgaging means repaying your existing mortgage and switching to a new deal, often with more competitive rates or terms.

When to remortgage

Best times to remortgage:

• 4 to 6 months before your current fix ends, so you can lock in a rate without paying an ERC
• When your property has increased in value, since a lower LTV usually means a more competitive rate
• When your credit score has improved
• When you've paid down significant debt

Times when remortgaging might not be worthwhile:

• If the ERC would wipe out any savings
• If your circumstances have changed and you might not be approved
• If your LTV hasn't improved significantly
• If you have very little time left on your mortgage

Product transfers vs remortgaging

When your fix ends, you have two main options:

• Product transfer: switch to a new deal with your existing lender without a full application. This is usually quicker and easier, but you're limited to what your current lender offers.
• Remortgage: move to an entirely new lender. This involves more paperwork and takes longer, but gives you access to a wider range of deals. An advisor can compare both options for you.

According to UK Finance, around 1.8 million fixed rate mortgages are due to end in 2026. If you're one of them, it's worth starting to look at your options now.

Understanding what your monthly mortgage payments will be helps you budget effectively and compare deals. Your monthly payment depends on three things: the loan amount, the interest rate, and the mortgage term.

Because rates vary by lender and change frequently, we don't publish specific payment examples here. An advisor or online mortgage calculator can give you an accurate, up-to-date figure based on your own circumstances.

Looking at the total cost, not just the monthly payment

When comparing deals, it helps to work out the total cost over your fixed period, including all fees:

Total cost = (monthly payment multiplied by the number of months in the fix) plus all fees

An arrangement fee can often be paid upfront or added to your mortgage balance, but if it's added to the balance, it will accrue interest, so it's worth factoring this into your comparison. This gives you a true like-for-like comparison between deals with different rate and fee combinations.

Not comparing enough deals

Many borrowers only look at their existing lender or one high-street bank. With hundreds of lenders in the market, this means you could miss a more suitable fixed rate mortgage deal. We compare deals across a wide range of lenders, including some that aren't available directly to consumers.

Focusing only on the interest rate

The lowest rate isn't always the cheapest deal once fees are taken into account. Always calculate the total cost, including all fees, before deciding which deal is right for you.

Waiting until your fix ends to act

If you wait until your fixed rate deal ends, you could spend months on the more expensive SVR while you arrange a new deal. Start looking 4 to 6 months before your fix ends.

Not considering your plans

If you might move, extend, or make significant overpayments, factor this in before choosing a deal. A deal with lower ERCs or more flexible overpayment terms might be worth a slightly higher rate.

Ignoring the standard variable rate

Check what SVR you'd revert to if you don't remortgage. Some lenders have much higher SVRs than others, which matters if your circumstances change and you can't easily switch deals.

Fixed rate mortgages for first-time buyers

First-time buyers can access the same fixed rate products as other borrowers, though a smaller deposit often means starting at a higher loan-to-value with a less competitive rate. Several government schemes can help boost your deposit, including Lifetime ISAs, First Homes, and Shared Ownership.

Many lenders also offer specific first-time buyer products, sometimes with lower fees or free valuations.

Fixed rate mortgages for self-employed borrowers

Self-employed borrowers can get fixed rate mortgages, but face some additional requirements:

• Usually 2 to 3 years of accounts or tax returns are needed
• Lenders use net profit for sole traders, or salary plus dividends for limited company directors
• Some lenders accept 1 year's accounts in certain circumstances
• A specialist advisor can help find lenders with more flexible criteria

Fixed rate mortgages with poor credit

Having missed payments, defaults, or other credit issues doesn't necessarily prevent you getting a fixed rate mortgage, but it will limit your options and increase your rate. Specialist lenders cater to borrowers with credit problems, and rates tend to improve as your credit history rebuilds. Key factors lenders consider include:

• How recent the credit issues are
• Whether debts are satisfied or outstanding
• The amount involved
• Your current financial situation

An advisor experienced with adverse credit can help identify which lenders are most likely to approve your application. If you're worried about debt or your wider financial situation, MoneyHelper offers free, independent guidance on 0800 138 7777.