Comparison · Mortgages
Fixed, variable or tracker: how mortgage rate structures differ
Last updated 25 October 2026 · 2 sources listed · Reading time about 3 minutes
Short answer
A fixed rate holds your payment steady for a set period, a variable rate moves at the lender's discretion, and a tracker follows an external benchmark. Fixed deals trade possible savings for certainty; variable and tracker deals pass changes through to you. Check the length of the fixed period, what happens after it, and any charges for leaving early.
Who this is for: A home buyer or existing owner choosing how the interest rate on a home loan will behave over the coming years.
What to evaluate
Payment certainty
A stable payment makes budgeting easier, especially on a tight margin.
How to check: Test whether you could still afford the payment if rates moved materially higher.
What follows the initial period
Many deals revert to a higher standard rate after an introductory term.
How to check: Ask for the reversion rate and how to avoid it.
Early repayment charges
Leaving or overpaying during a fixed period can cost money.
How to check: Read the charge schedule and annual overpayment allowance.
Benchmark linkage
A tracker follows a named rate, with a margin set at the outset.
How to check: Confirm which rate is tracked, the margin, and any floor.
Product fees
Arrangement and valuation fees can offset a lower rate.
How to check: Compare the total cost over the deal period, not just the rate.
Portability
If you move, the deal may or may not transfer.
How to check: Ask whether the product can be ported and under what conditions.
Comparison
| Structure | Good when | Watch out for |
|---|---|---|
| Fixed for a set term | You value predictable payments | Charges for leaving early and reversion rate |
| Standard variable | You want flexibility to overpay or leave | Rate moves at lender discretion |
| Tracker | You want transparent linkage to a benchmark | Payment rises when the benchmark rises |
| Discounted variable | You want a lower start | Discount ends and rate still moves |
| Offset or flexible | You hold savings and want to reduce interest | Product complexity and potentially higher rate |
Decision worksheet
Rate up to three options against this guide’s own criteria. It runs in your browser and saves only on this device. It is a thinking aid, not a recommendation.
1. Have you checked each criterion?
0 of 6 criteria checked.
2. Compare options (0 = fails or unknown, 3 = meets it well)
| Criterion | |||
|---|---|---|---|
| Payment certainty | |||
| What follows the initial period | |||
| Early repayment charges | |||
| Benchmark linkage | |||
| Product fees | |||
| Portability | |||
| Total (max 18) | 0 | 0 | 0 |
Questions to ask before you commit
- How long does the rate last and what happens at the end?
- What are the early repayment charges and how do they taper?
- How much can I overpay each year without penalty?
- What fees apply at the start and the end?
- Can the product be ported to another property?
- For a tracker, what is the benchmark and the margin?
- Is there a collar or floor on the rate?
Typical trade-offs
Longer fix versus shorter fix
- Upside
- A longer fix protects against rises for longer.
- Downside
- Less flexibility and potentially paying more if rates fall.
Fixed versus tracker
- Upside
- Fixed removes payment surprises.
- Downside
- A tracker may cost less if the benchmark falls.
Low rate with high fee versus higher rate with low fee
- Upside
- A low rate suits large balances held long.
- Downside
- A high fee is a poor trade if you move or refinance early.
Common mistakes
- Choosing the lowest rate without adding the fees and charges.
- Ignoring the reversion rate and drifting onto it after the deal ends.
- Fixing for longer than you expect to stay in the property.
- Assuming a lender will always let you leave for free.
Related questions
Is fixed always safer?
Fixed provides payment certainty, which is a real form of protection for budgeting, but it does not remove every danger. If market rates fall, you may be stuck paying more than new borrowers, and leaving early could trigger a charge. If rates rise, you are shielded during the fix. Safety depends on whether your budget could withstand variable swings and how long you expect to stay.
What is a tracker mortgage?
A tracker follows a stated benchmark, typically a central bank or market rate, plus a fixed margin. When the benchmark moves, so does your rate, usually quickly. It offers transparency but not payment stability. Check for floors that stop the rate falling below a level and for any term limits on the tracking period.
What happens when my fixed period ends?
Most loans move to the lender's standard variable or reversion rate unless you choose a different product. That rate is often higher than the deals available to existing borrowers. Many lenders let you arrange a replacement months in advance, so diarise the end date and begin comparing well beforehand.
Can I overpay a fixed mortgage?
Often yes up to an annual allowance, expressed as a proportion of the balance, without penalty. Above that, early repayment charges may apply. Check how overpayments are applied: some reduce the term while others reduce payments. Confirm the rule in your offer document.
Sources and further reading
These pages were reachable when we last checked. They informed definitions and rules referred to above; they do not endorse this guide. Where rules differ by country, check the authority for your location.
- Mortgages — Consumer Financial Protection Bureau, retrieved 27 October 2026
- Consumer information and guidance — Financial Conduct Authority, retrieved 27 October 2026
Related guides
Requirements · Mortgages
What a mortgage application requires and how the process unfolds
The process typically moves from an agreement in principle to a full application, valuation, underwriting and a formal offer. Lenders verify identity, income, outgoings, deposit source and credit history. Preparing documents, keeping finances stable and avoiding unnecessary credit applications reduces delays. Specific requirements and stages vary by country and lender.
Alternatives · Mortgages
Refinancing a mortgage versus staying put: the costs and trade-offs
Options when a deal ends or circumstances change include switching to a different product with the same lender, moving to another lender, borrowing more against the home or simply staying on the reversion rate. Compare total cost including fees, early repayment charges and the value of flexibility. A broker or independent adviser can compare the wider market.
Problems & fixes · Mortgages
What to do if you struggle to keep up with mortgage payments
Contact the lender before arrears build and ask about forbearance: temporary reduced payments, a term extension, a payment deferral or a switch to interest-only for a period. Each has long-term cost. Seek free debt advice, prioritise housing costs and understand the process lenders must follow before taking possession, which varies by jurisdiction.
Cost factors · Business operations
What determines the cost of a business loan
Cost depends on the lender's view of risk, the term, security offered, the repayment structure and fees. Longer terms usually lower the monthly payment but increase total interest. Arrangement fees, early repayment charges and insurance requirements add to the real cost. Compare offers using the total amount repayable and the standardised cost measure your regulator requires. This is general information, not advice.
How to choose · Personal loans
How to compare personal loan offers on equal terms
Compare loans using the annual percentage rate or equivalent standardised figure, then total repayable, fees, and flexibility. Check eligibility with soft searches before formal applications, read the early repayment terms, and confirm what happens if you miss a payment. A longer term lowers the monthly cost but typically raises total interest.
Cost factors · Credit cards
What credit card interest and fees actually cost over a billing cycle
Card costs come from interest on balances carried past the due date, plus fees triggered by specific events: late payment, cash advances, foreign use and sometimes an annual charge. Interest usually accrues daily on the average balance, and a grace period often disappears once you carry any balance. Reading the summary box and statement tells you what drives your cost.
Comparison · Savings and deposits
Term deposit or instant-access savings: matching money to its time horizon
Term deposits pay a defined rate for a defined period in return for restricted access, which suits money with a known date of need. Instant access keeps flexibility but exposes you to variable rates. Consider a ladder of maturities, early withdrawal terms, what happens at maturity and whether rate expectations should influence the decision.