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Fixed or tracker mortgage?

Fixed or tracker mortgage? How the two differ, when each tends to suit, and the Bank Rate level where a tracker stops being cheaper.

3D glass building with columns, for a fixed or tracker mortgage that follows the Bank of England

Quick answer

A fixed rate stays the same for the length of the deal, so your payment is certain. A tracker follows Bank Rate plus a set margin, so your payment moves when Bank Rate moves. Trackers often start cheaper and some have no early repayment charge, but you carry the risk of rises.

Choosing a fixed or tracker mortgage usually comes down to how much certainty you need, where markets expect Bank Rate to go, and whether you might want to leave early.

Bank Rate 
Average 2 year fix 
Rate pressure 
FixedSame payment
TrackerBank Rate plus a margin
Some trackersNo early charge

Updated today

Bank Rate
 
Bank of England
Average 2 year fix
 
Across lenders
Average 5 year fix
 
Across lenders
Rate pressure
 
Theo’s reading
A fix
Certain
For the whole deal
A tracker
Moves
With Bank Rate
Decisions a year
8
Bank of England
Rate signals read
10
Every weekday

What markets expect

Loading

Reading today’s signals

Six levels, from Easing fast to Severe. Theo lights the gauge up to today’s level.

  • Easing fast
  • Easing
  • Steady
  • Building
  • High
  • Severe
Theo app Fixed or tracker card comparing a no penalty 2 year tracker with a 2 year fix, and the Bank Rate level at which the tracker stops being cheaper
Example screen from the Theo app, October 2026.

Fixed or tracker mortgage, in the app

Theo’s Fixed or tracker card compares a tracker with no early repayment charge against a fix, on your own mortgage, and shows the Bank Rate level where the tracker stops being cheaper.

Theo’s read

Loading today’s read.

Every weekday Theo writes a plain English read of what moved in the market and what it has usually meant for fixed rates.

19 signalsUpdated through the dayPlain English

Watch Bank Rate

Theo updates trackers the day Bank Rate changes.

Where a tracker stops being cheaper

Enter a fixed rate and a tracker’s margin above Bank Rate. Bank Rate and today’s average 2 year fix are filled in when Theo’s live figures load.

The tracker stays cheaper while Bank Rate is below
Enter the rates
Enter a fixed rate, a tracker margin and Bank Rate.

A guide to the break even point, not a prediction. Bank Rate can rise or fall during a deal.

Fixed or tracker mortgage: the difference

How the two usually compare.
Fixed rateTracker
Your rateStays the same for the dealBank Rate plus a set margin
Your paymentCertain until the deal endsMoves when Bank Rate moves
Priced fromSwap ratesBank Rate
Early repayment chargeUsually, during the dealSome trackers have none
Suits people whoWant certainty for budgetingCan absorb rises, or want flexibility

Fixed rates are priced from swap rates, which reflect where markets expect Bank Rate to go. That is why a fix can cost more than a tracker today: the market is pricing in what it expects over the deal.

The break even point

A tracker costs less than a fix while Bank Rate plus the tracker’s margin stays below the fixed rate. With a 5.00% fix and a tracker at Bank Rate plus 0.80%, the tracker is cheaper while Bank Rate stays below 4.20%. The calculator above works this out with today’s figures.

The break even point tells you how much room Bank Rate has to rise before the tracker costs more. Whether it will rise that far is the uncertain part. See the Bank of England base rate and Theo’s reading of where rates are heading.

When a fixed or tracker mortgage suits

A fix tends to suit people who need to know their payment for budgeting, or who would struggle if rates rose. A tracker tends to suit people who can absorb a rise, expect Bank Rate to fall, or value being able to leave or overpay without a charge, which some trackers allow. Many people choose a tracker with no early repayment charge so they can switch to a fix later if rates start to rise. An FCA-authorised mortgage adviser can weigh this up with you.

Things to check on a tracker

Check the margin, how long the tracker lasts, whether there is an early repayment charge, and whether there is a floor or collar, a minimum rate the tracker will not fall below even if Bank Rate does. For more on how trackers work, see tracker mortgages explained. For the length of a fix, see should I fix for 2 or 5 years.

Common questions

What is the difference between a fixed and a tracker mortgage?
A fixed rate stays the same for the deal, so your payment is certain. A tracker follows Bank Rate plus a set margin, so your payment rises and falls when Bank Rate changes.
Is a tracker mortgage a good idea at the moment?
It depends on where Bank Rate goes and how much a rise would affect you. A tracker costs less than a fix while Bank Rate plus its margin stays below the fixed rate. The calculator on this page shows today’s break even point.
Are trackers cheaper than fixed rates?
Often at the start, but not always over the deal. If Bank Rate rises above the break even point, a tracker ends up costing more than the fix would have.
Can I switch from a tracker to a fixed rate?
Yes. If your tracker has no early repayment charge, you can usually switch to a fix at any time. If it has a charge, check the cost first.
Should I get a fixed or tracker mortgage?
It depends on how much certainty you need, how a rise in Bank Rate would affect you, and whether you might want to leave early. A fixed or tracker mortgage can both suit, and an FCA-authorised mortgage adviser can weigh them up with you.
What is a tracker collar?
A minimum rate, sometimes called a floor, that the tracker will not go below even if Bank Rate falls further. Check whether a tracker has one before you choose it.

Keep exploring

Written by Jason Foord, CeMAP-qualified mortgage adviser and Director of Verifi Mortgages Ltd (FCA No. 997175), and founder of Theo. Updated 16 October 2026. Live figures on this page update automatically.

Theo App Ltd is not authorised by the Financial Conduct Authority and does not give mortgage advice. This page is information only and is not a recommendation. Figures marked illustrative are examples, not offers. Speak to an FCA-authorised mortgage adviser about your own circumstances.

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