Fixed, Tracker or Variable? Choosing a Mortgage Rate Type

This guide provides general information and is not a substitute for personalised mortgage, tax or legal advice.

Written and reviewed by the Highhouse Money mortgage team · Last reviewed: 25 August 2026

One of the biggest decisions when arranging a mortgage is not just which lender to use, but which type of interest rate to choose. Fixed and tracker deals sit at two ends of a spectrum between certainty and flexibility, with discounted and standard variable rates alongside them. None is objectively 'better' — the right choice depends on your budget, your tolerance for change, and how long you expect to keep the deal.

This guide explains how each rate type works in plain terms, what typically drives the choice between them, and the questions worth asking before you commit. It does not recommend one option over another, because that depends on your personal circumstances.

Questions to work through before choosing a rate type

How much would my payment need to rise before it became a serious problem?
Do I want budgeting certainty, or am I comfortable with some variation?
How long do I plan to stay in this property or keep this mortgage?
Does the product carry an early repayment charge, and for how long?
What happens to the rate at the end of the deal — is there a follow-on rate?
Are there arrangement, valuation or legal fees, and how do they affect the overall cost?
Is there a maximum or minimum the rate can move to (a cap or collar)?
Would a shorter or longer deal length suit my plans better?

Fixed-rate mortgages

A fixed-rate mortgage locks your interest rate for an agreed period, commonly two, three, five or occasionally longer. Whatever happens to wider interest rates during that time, your rate and monthly payment stay the same, which makes budgeting straightforward.

The trade-off is that you do not benefit if rates fall during the fixed period unless you remortgage, which may involve an early repayment charge. Fixed deals suit people who prioritise predictability, particularly if their household budget has little slack to absorb higher payments.

Tracker mortgages

A tracker mortgage follows a named reference rate, most commonly the Bank of England base rate, plus a fixed margin set by the lender. If the base rate moves, your payment moves with it, usually within a set timeframe of any change.

Trackers can work out cheaper than fixed deals over time if rates fall or stay low, but they carry the risk of higher payments if rates rise. They suit borrowers who can absorb some payment variation and who have a view — or an acceptance of uncertainty — about the interest rate environment.

Discounted variable rate mortgages

A discounted rate is a set reduction applied to the lender's own standard variable rate for a defined period, rather than tracking the base rate directly. Because SVRs are set by the lender's own discretion, a discounted rate can move independently of the Bank of England base rate.

Discounted rates and trackers are both variable, but they track different things. Always check exactly what your rate is linked to before comparing products.

Standard variable rate: the default fallback

When any deal period ends, your mortgage usually reverts to the lender's standard variable rate (SVR) unless you have arranged a new deal. SVRs are typically the most expensive rate a lender offers and can be changed at the lender's discretion at any time.

Very few borrowers choose to stay on the SVR by design; it is usually a default that arises from not reviewing options before a deal ends. Reviewing your mortgage ahead of the deal end date, as covered in our remortgage timing guide, helps you avoid unnecessary time on the SVR.

Comparing the main rate types

Rate type	Payment behaviour	Typical appeal
Fixed	Unchanged for the deal period	Budgeting certainty
Tracker	Moves with the base rate plus margin	Potential to benefit from falling rates
Discounted variable	Moves with the lender's SVR minus a discount	Often a lower starting rate than SVR
Standard variable (SVR)	Set and varied at the lender's discretion	Usually a fallback, rarely chosen deliberately

Deal lengths, fees and any caps or collars vary by product and should be compared alongside the headline rate.

Early repayment charges and deal length

Most fixed and many tracker or discounted deals carry an early repayment charge (ERC) if you leave, overpay beyond an allowance, or remortgage before the deal period ends. ERCs are typically a percentage of the balance that can step down each year. Understanding the ERC schedule matters as much as the headline rate, particularly if your plans might change during the deal.

Deal length is a related decision: a longer fixed period offers longer certainty but reduces flexibility to react to a changing situation, while a shorter deal means reviewing your options — and facing potential rate changes — sooner.

Weighing it up for your situation

There is no rate type that suits everyone, and general commentary about which is 'winning' at any given time does not account for your personal budget, plans or appetite for risk. An advisor can talk through your specific circumstances, model how different rate types would affect your payments, and help you weigh the trade-offs — without steering you towards a decision that should ultimately be yours.

Your home may be repossessed if you do not keep up repayments on your mortgage.

What lenders may assess

Affordability at the rate applicable now, and sometimes a stress-tested higher rate for variable products
Loan-to-value based on the property valuation
Credit history and existing financial commitments
Employment status and income stability
The deal length and rate type requested against the lender's current product range
Any early repayment charge implications if replacing an existing deal

Every lender sets its own criteria, which change regularly. The points above are common themes, not a guarantee of how any individual lender will treat an application.

Frequently asked questions

What's the main difference between fixed and tracker mortgages?

A fixed-rate mortgage keeps your interest rate — and therefore your monthly payment — the same for an agreed period, regardless of what happens to wider interest rates. A tracker mortgage moves up and down in line with a reference rate, usually the Bank of England base rate plus a set margin, so your payments can rise or fall during the deal.

Is a fixed rate always the safer choice?

It offers payment certainty, which many households value, but 'safer' depends on your circumstances and risk tolerance. If rates fall after you fix, you will not benefit unless you remortgage, potentially paying an early repayment charge to do so. If you value predictable budgeting over the chance of a lower rate, a fixed deal may suit you better than a tracker.

What is a discounted variable rate mortgage?

It tracks the lender's own standard variable rate (SVR) at a discount for a set period, rather than tracking the Bank of England base rate directly. Because the lender can move its SVR at its own discretion, discounted deals can behave differently from base-rate trackers even when the base rate itself is unchanged.

Can I switch from a tracker to a fixed rate part-way through a deal?

Often yes, but check whether an early repayment charge applies — some tracker deals carry one, others do not, particularly towards the end of the term. If your deal has no ERC, switching to lock in a rate can be straightforward; if it does, weigh the charge against the potential benefit before deciding.

What happens when my fixed or tracker deal ends?

Unless you arrange a new deal, you typically move onto your lender's standard variable rate, which is usually higher and can change at any time. Reviewing your options before your deal ends — whether through a product transfer or a remortgage — is the way to avoid unnecessary time on the SVR.

Are there caps on how high a tracker rate can go?

Some tracker products include a 'collar' (a floor below which the rate will not fall) or, less commonly, a cap on how high it can rise, but many do not. Always check the specific terms of a product rather than assuming protection either way.

Do fixed and tracker deals have the same fees?

Fee structures vary by lender and product rather than by rate type alone — arrangement fees, valuation fees and legal costs can apply to either. Compare the overall cost over the deal period, not just the headline rate, when weighing up options.

Which rate type is right for me?

It depends on your appetite for payment changes, how tight your budget is, your view on the wider interest rate environment, and how long you plan to stay in the deal or property. This is a personal decision best worked through with an advisor rather than decided from general guidance alone.

Sources and further reading

Where figures or rules can change, the position described is correct at the time of writing (25 August 2026) — always check the linked authoritative source for the latest position.

Residential mortgages

Whole-of-market advice on choosing the right deal and rate type.

When to start remortgaging

Timing your next move before your current deal ends.

Mortgage costs and fees explained

Understand arrangement fees, valuation costs and more alongside the rate.

First-time buyer mortgage checklist

Starting from scratch? Begin with the basics.

How to choose a mortgage broker

Get help comparing rate types across the whole market.

Talk through your options

Discuss which rate type might suit your circumstances.

Talk it through with an advisor

Every case is different. A short, no-obligation conversation with a whole-of-market advisor is often the fastest way to understand your options. Call 0345 512 0077 or send us a message.

Contact an advisor