Mortgage Types Explained: Fixed, Variable and Tracker Rates
Choosing a mortgage is one of the biggest financial decisions you'll make. The type of mortgage you select will affect your monthly payments, your financial security, and your long-term costs. Yet many people focus only on finding the lowest rate without understanding how different mortgage types actually work.
This guide breaks down the three main mortgage types available in the UK: fixed rate, variable rate, and tracker mortgages. We'll explain how each one works, their advantages and disadvantages, and help you figure out which might suit your situation.
Fixed Rate Mortgages
With a fixed rate mortgage, your interest rate stays the same for a set period, usually between 2 and 10 years. This means your monthly payment remains constant throughout that period, regardless of what happens to interest rates in the broader economy.
Currently, the average 5-year fixed mortgage rate sits at 3.97%, while 2-year fixed rates average 6.59%. These rates reflect the current Bank of England Base Rate of 3.75%, though fixed rates are set by lenders based on their own funding costs and market conditions, not directly on the base rate.
How Fixed Rate Mortgages Work
When you fix your mortgage rate, the lender agrees to lend you money at a set interest rate for your chosen term. The lender protects itself against future rate changes by hedging in the financial markets. This protection comes at a cost, which is why fixed rates are typically slightly higher than the starting rate on a variable mortgage.
Once the fixed period ends, your mortgage will revert to your lender's standard variable rate unless you remortgage to another deal. This is a critical point many people overlook. When your fix expires, your monthly payment could rise significantly.
Advantages of Fixed Rate Mortgages
- Certainty and budgeting. You know exactly what your mortgage payment will be each month. This makes household budgeting straightforward and helps you plan ahead with confidence.
- Protection from rate rises. If the Bank of England raises base rates, your fixed payments don't increase. This is invaluable peace of mind during uncertain economic times.
- Easier to plan remortgaging. You know exactly when your fixed period ends, so you can start researching new deals 3 to 4 months beforehand.
- Appeals to cautious borrowers. If you're risk-averse or have a tight budget, fixing your rate removes a major source of financial uncertainty.
Disadvantages of Fixed Rate Mortgages
- Early repayment penalties. If you want to pay off your mortgage early or switch to another lender before the fixed period ends, you'll face early repayment charges. These can be substantial, sometimes 3-5% of your outstanding balance.
- Slightly higher initial rates. You pay for the certainty of fixing your rate. Variable options are often 0.5% to 1% cheaper initially.
- Rate reversion risk. When your fix ends, rates might be significantly higher. You could face a painful payment increase if you don't remortgage in time.
- Missing out if rates fall. If the Bank of England cuts base rates substantially, you won't benefit while your fix is in place.
Variable Rate Mortgages
A variable rate mortgage has an interest rate that can change. Your lender can adjust your rate at any time, which means your monthly payment can increase or decrease. Variable rates are directly linked to your lender's standard variable rate, SVR.
How Variable Rate Mortgages Work
With a variable mortgage, the lender doesn't lock in a rate. Instead, they reserve the right to change it. When the Bank of England changes base rates, lenders typically adjust their SVR in response. Your payment can then rise or fall.
Most variable mortgages come with a discount or premium applied to the lender's SVR. For example, your rate might be SVR minus 1%, so if SVR is 8%, you'd pay 7%. The discount stays with you even if SVR changes.
Advantages of Variable Rate Mortgages
- Lower initial rates. Variable mortgages are typically cheaper than fixed ones when you first take them out. This can save you hundreds of pounds per year initially.
- No early repayment penalties. Most variable mortgages allow you to overpay or switch lenders without penalties, giving you flexibility.
- Benefit from rate cuts. When the Bank of England cuts base rates, your payments fall relatively quickly.
- Lower admin fees. Because there's less risk to the lender, variable mortgages sometimes have lower arrangement fees.
Disadvantages of Variable Rate Mortgages
- Payment uncertainty. Your monthly payment can change, sometimes significantly. This makes budgeting difficult and causes stress for many borrowers.
- Exposure to rate rises. When the Bank of England raises base rates, your mortgage payments increase. During a period of rising rates, you could see your payment jump by hundreds of pounds.
- Potential for payment shock. After years of stability, a rapid series of rate increases can make your mortgage suddenly unaffordable for some households.
- Long-term cost uncertainty. You can't accurately calculate the total interest you'll pay over your mortgage term.
Tracker Mortgages
A tracker mortgage is a type of variable mortgage that tracks the Bank of England Base Rate plus a fixed margin set by your lender. They offer a middle ground between the certainty of a fixed rate and the flexibility of a standard variable rate.
How Tracker Mortgages Work
With a tracker, your interest rate is calculated as base rate plus a margin. For example, if base rate is 3.75% and your margin is 2%, you'd pay 5.75%. When base rate changes, your rate changes immediately and by exactly the same amount. The margin never changes.
Trackers are typically available for a set period, say 2 or 5 years, after which they revert to the lender's SVR unless you remortgage.
Advantages of Tracker Mortgages
- Transparency. You always know exactly how your rate is calculated. There's no hidden discretion from the lender about whether to pass on rate changes.
- Immediate response to base rate changes. As soon as the Bank of England acts, your rate changes. You benefit immediately from cuts and are exposed immediately to rises.
- Lower rates than standard variable. Tracker margins are often lower than the discount on a variable mortgage, making them cheaper overall.
- Flexibility. Most trackers come with no early repayment penalties, so you can switch or overpay without charge.
Disadvantages of Tracker Mortgages
- Payment uncertainty. Like all variable mortgages, your payment isn't fixed. When base rate rises, so does yours.
- Less protection than fixed rates. You have no protection against base rate rises. During a period of monetary tightening, your payments could increase significantly.
- Reversion to SVR. Once your tracker period ends, your rate reverts to the lender's SVR, which could be much higher and may include a much larger margin.
- Psychological impact of changes. Frequent rate changes can be unsettling, even if mathematically the total cost is reasonable.
Comparing the Three Types
The best mortgage type depends on your personal circumstances, your risk tolerance, and the economic outlook. Here's a practical comparison:
Choose fixed if: You want payment certainty, you're on a tight budget and need to know exactly what you're spending, you believe interest rates will rise, or you're a first-time buyer who wants to avoid surprises. Fixed rates are also sensible if you're remortgaging and approaching retirement, when income stability becomes increasingly important.
Choose variable if: You're comfortable with payment fluctuations, you have financial flexibility to absorb payment increases, you believe base rates will fall over your mortgage term, or you plan to move or pay off the mortgage within a few years. Variable mortgages also make sense if early repayment penalties matter to you.
Choose tracker if: You want transparency and flexibility combined, you like knowing exactly how your rate is calculated, you believe base rates will stay stable or fall, or you want the certainty that rate changes will be passed on immediately by the lender rather than at the lender's discretion.
Current Market Context
The UK housing market is evolving. House prices have risen 2.4% annually, with the average UK property now valued at £270,259. Interest rates remain elevated at 3.75% base rate, meaning mortgage costs are still higher than the historic lows of 2020 and 2021.
In this environment, fixed rates offer genuine protection. If you're buying a property or remortgaging, locking in a rate today protects you against further base rate rises. The Bank of England has signalled it may hold rates steady for a while, but forward guidance can change.
The average 5-year fixed rate of 3.97% looks attractive compared to the 2-year fixed rate of 6.59%, suggesting that longer-term fixes currently offer better value. This is worth considering when deciding on your fixed period length.
Decisions to Make Beyond Mortgage Type
Once you've chosen between fixed, variable, and tracker, you'll need to decide on your fixed period if choosing a fixed rate. A 2-year fix is shorter but cheaper initially. A 5-year fix costs more upfront but offers longer protection.
You'll also need to decide on your mortgage term (25 years is standard, but you can choose 15, 35 years, or other lengths) and your loan-to-value ratio (the percentage of the property price you're borrowing). These decisions interact with your choice of mortgage type and significantly affect your overall cost.
The complexity of mortgage choices is one reason many buyers and sellers benefit from professional guidance. A good mortgage broker understands how different mortgage types interact with your personal circumstances and can highlight options you might miss on your own.
Similarly, if you're selling a property, working with an experienced estate agent protects you from underpricing your home and ensures you're making decisions about timing and strategy with full information. Experienced agents typically achieve 5-10% more than the asking price through skilled negotiation and market knowledge, which easily covers their fees many times over. You can compare local estate agents on AgentSeeker to find someone who understands your specific market.
Remortgaging Considerations
If you're coming to the end of a fixed or tracker period, remortgaging is usually worth considering. Most people automatically roll onto their lender's standard variable rate, which is significantly more expensive. Instead, you should shop around for a better deal.
Start researching new mortgages 3 to 4 months before your current deal ends. This gives you time to compare rates, arrange a valuation, and complete the paperwork without stress. Early remortgage can sometimes incur penalties, so check your mortgage documents first.
Getting Professional Advice
Mortgage choices can feel overwhelming, and a small error in understanding your options can cost you tens of thousands of pounds over your mortgage term. A mortgage broker can explain how each type works in your specific situation and help you model the costs under different scenarios.
A mortgage broker is particularly valuable if your circumstances are complex, if you're self-employed, or if you have a non-standard property. They can also tell you what lenders will and won't lend on, saving you the frustration of making an application that fails.
If you're buying or selling a property, professional guidance extends beyond mortgages. A good estate agent protects you from costly mistakes in pricing, negotiation, and timing. Rather than trying to handle everything yourself, working with the right professionals is an investment that pays for itself many times over.