Choosing a mortgage type is not just about finding the lowest rate. The structure of your mortgage — fixed or variable, repayment or interest-only, standard or offset — determines how much risk you carry, how flexible your finances are, and what happens when your circumstances change.
This hub explains every main mortgage type available in the UK in 2026: how each works, what it costs, who it suits, and when to avoid it.
The Main UK Mortgage Types at a Glance
| Type | Rate changes? | Repay capital? | Best for |
|---|---|---|---|
| Fixed rate | No — locked for deal period | Yes (repayment) | Payment certainty |
| Tracker | Yes — follows base rate | Yes (repayment) | Expecting rate falls, no ERC needed |
| Standard Variable Rate (SVR) | Yes — at lender’s discretion | Yes (repayment) | No one — usually the most expensive |
| Offset | Depends on linked rate | Yes (repayment) | Large savings holders, higher rate taxpayers |
| Interest-only | Depends on rate type | No — separate plan needed | Buy-to-let, high earners with repayment plan |
| Guarantor / JBSP | Fixed or variable | Yes | First-time buyers needing income boost |
Fixed Rate Mortgages
A fixed rate mortgage locks your interest rate for an agreed period — most commonly 2, 5, or 10 years. During the fixed period, your monthly payment does not change regardless of what happens to the Bank of England base rate or the lender’s SVR.
Fixed Rate Costs and Trade-offs
| Fix length | Rate compared to tracker | Early Repayment Charge | Useful when |
|---|---|---|---|
| 2-year fix | Usually lowest | 1–3% of balance | Rates expected to fall; want flexibility soon |
| 5-year fix | Mid | 2–5% of balance | Want longer certainty; plan to stay put |
| 10-year fix | Highest fixed rate | 2–5% (early years) | Maximum certainty; long-term stability |
The 2 vs 5 year decision in 2026: With rates still elevated but widely expected to ease, many borrowers are caught between fixing short (to remortgage when rates fall) and fixing long (to protect against rates staying higher for longer). A 2-year fix gives you a remortgage opportunity in 2028; a 5-year fix runs to 2031. The right answer depends on your view on rates and your need for payment certainty.
Key risk: If you need to leave a fixed rate early — because you move, divorce, or need to remortgage — you will usually pay an Early Repayment Charge (ERC) of 1–5% of the outstanding balance. On £250,000 that is £2,500–£12,500.
See: Fixed vs Variable Rate Mortgage UK and Should I Fix My Mortgage or Go Variable?
Tracker Mortgages
A tracker mortgage charges interest at the Bank of England base rate plus a fixed margin — for example, base rate + 0.85%. When the base rate changes, your rate and monthly payment change automatically.
Tracker Mortgage Characteristics
| Feature | Detail |
|---|---|
| Rate formula | Bank of England base rate + lender margin |
| Payment certainty | None — changes with each base rate move |
| Early Repayment Charges | Often zero or very low |
| Floor | Some trackers have a floor rate (minimum), some do not |
| Term | Usually 2 years, then reverts to SVR |
When Trackers Work Well
- You expect rates to fall and want automatic benefit without remortgaging
- You plan to overpay heavily (no ERC means no penalty on overpayments)
- You plan to move or sell within 1–2 years and want to avoid ERC
- You have financial headroom to absorb a payment increase if rates rise
In 2026: The Bank of England base rate sits at elevated levels versus the 2010s. Trackers are attractive if you believe rates will fall — each base rate cut automatically reduces your monthly payment. The downside is full exposure to any future rises.
See: Tracker Mortgages Explained UK and Tracker vs Fixed Mortgage UK
Standard Variable Rate (SVR)
When a fixed or tracker deal ends, the mortgage automatically reverts to the lender’s Standard Variable Rate. SVRs are typically 1.5 to 3.5 percentage points above competitive fixed rates and can be changed at any time by the lender.
The SVR trap: Many borrowers drift onto the SVR when a deal ends and fail to remortgage promptly. On a £200,000 mortgage, an SVR 2% above a competitive fix costs an extra £300–£400 per month.
The SVR’s only advantage is no ERC — you can leave at any time without penalty, which makes it temporarily useful if you are selling or waiting for a specific deal to become available.
See: What Happens When Your Fixed-Rate Mortgage Ends?
Offset Mortgages
An offset mortgage links a savings account to your mortgage balance. Interest is charged only on the net balance — mortgage debt minus savings.
How Offset Works: Worked Example
| Without offset | With offset | |
|---|---|---|
| Mortgage balance | £220,000 | £220,000 |
| Savings balance | £0 | £40,000 |
| Effective mortgage | £220,000 | £180,000 |
| Monthly interest (at 4.5%) | £825 | £675 |
| Annual interest saving | — | £1,800 |
| Equivalent savings rate needed | — | 4.5% (tax-free effectively) |
The interest saving is tax-free — unlike savings interest, which is taxed at your marginal rate. For a 40% taxpayer, a 4.5% offset saving is equivalent to earning 7.5% on a standard savings account before tax.
Who Benefits Most from Offset
| Situation | Offset benefit |
|---|---|
| Higher rate taxpayer with £30k+ savings | High — tax-free interest saving |
| Self-employed with variable cash | Good — keeps savings accessible while reducing interest |
| Small savings balance (under £10k) | Low — rate premium on offset deal often outweighs saving |
The offset trade-off: Offset deals typically carry slightly higher rates than equivalent standard mortgages. They are most valuable when savings balances are large and stable. If your savings regularly drop below £10,000–£15,000, a lower-rate standard mortgage plus a high-interest savings account may produce better total returns.
See: Offset Mortgage vs Overpaying
Interest-Only Mortgages
On an interest-only mortgage, monthly payments cover only the interest — the original capital borrowed is repaid separately at the end of the term. Monthly payments are significantly lower than on a repayment mortgage.
Repayment vs Interest-Only: Monthly Cost Comparison
| Mortgage balance | Term | Rate | Repayment | Interest-only | Monthly saving |
|---|---|---|---|---|---|
| £200,000 | 25 years | 4.5% | £1,111 | £750 | £361 |
| £250,000 | 25 years | 4.5% | £1,389 | £938 | £451 |
| £300,000 | 25 years | 4.5% | £1,667 | £1,125 | £542 |
The lower payment comes at a cost — over 25 years at 4.5%, the total interest on a £200,000 interest-only mortgage is £225,000. The capital must still be repaid in full at the end.
Who Interest-Only Suits
| Borrower type | Why it can work | Risk |
|---|---|---|
| Buy-to-let landlord | Lower monthly cost improves cashflow; property sold at end | Property must be worth enough to repay loan |
| High earner with investments | Investments intended to repay capital | Investments may underperform |
| Borrower nearing retirement | Downsizing will repay the loan | Must actually downsize |
| Standard residential buyer | Usually inappropriate without solid repayment plan | Capital never repaid if plan fails |
Residential interest-only mortgages require lenders to verify a credible repayment strategy. “I’ll worry about it later” is not an acceptable plan — lenders will not approve the mortgage on this basis.
See: Interest-Only Mortgages UK and Interest-Only vs Repayment Mortgage UK
Guarantor and Joint Borrower Mortgages
These specialist products are designed for buyers whose income or deposit alone is insufficient.
Guarantor Mortgages
A guarantor (usually a parent) agrees to cover mortgage payments if the borrower defaults. The guarantor may use their own property or income as security. If payments are missed, the guarantor is legally liable.
Risks for the guarantor:
- Their property could be repossessed if payments are not made
- Their credit file may be affected
- They remain liable until the borrower can remortgage without the guarantee
Joint Borrower Sole Proprietor (JBSP)
A JBSP mortgage includes a parent’s income in the affordability calculation without them being on the title deeds (so they do not own a share and are not liable for an additional Stamp Duty surcharge). This is increasingly common and often preferable to a guarantor mortgage for both parties.
See: Guarantor Mortgages Explained UK
Repayment vs Capital: The Underlying Method
Every mortgage type above can be structured as repayment or interest-only (where the lender permits). The type of rate (fixed, tracker, SVR, offset) is a separate decision from the repayment method.
Most residential mortgages should be on a repayment basis — this is how you actually own the property outright at the end of the term. Interest-only is a specialist route requiring a separate capital repayment plan.
Mortgage Types Guides in This Cluster
| Guide | What it covers |
|---|---|
| Types of Mortgages UK | Full overview of all UK mortgage types |
| Mortgage Types Explained | How the main structures compare |
| Fixed vs Variable Rate Mortgage UK | Certainty vs flexibility comparison |
| Should I Fix or Go Variable? | Practical 2026 decision guide |
| Tracker Mortgages Explained | How trackers work and when they suit |
| Tracker vs Fixed Mortgage UK | Side-by-side comparison |
| Offset Mortgage vs Overpaying | Liquidity vs interest reduction |
| Interest-Only Mortgages UK | Suitability, risks and lender criteria |
| Interest-Only vs Repayment Mortgage | Full cost comparison |
| Interest-Only Mortgage Calculator | Monthly cost tool |
| Guarantor Mortgages Explained | Family-assisted borrowing |
| What Is LTV? | How deposit size affects rate type access |
For the broader mortgage picture, return to Mortgages & Property.