Understanding Mortgage Rates: Fixed, Tracker & SVR Explained

Understanding mortgage rates is fundamental to choosing the right product and managing your home loan effectively. This guide explains the main rate types available in the UK and helps you decide which suits your situation.

How Mortgage Interest Works

Your mortgage interest rate determines how much you pay to borrow money. On a £250,000 mortgage:

Interest Rate	Monthly Payment (25-year term)	Total Interest Paid
3.5%	£1,252	£125,600
4.5%	£1,390	£167,000
5.5%	£1,535	£210,500
6.5%	£1,687	£256,100

Even small rate differences add up to significant sums over your mortgage term.

Fixed Rate Mortgages

A fixed rate mortgage locks in your interest rate for a set period, typically 2, 3, 5, or 10 years.

How They Work

• Your rate stays the same regardless of Bank of England decisions
• Monthly payments remain constant for the fixed period
• After the fixed period ends, you move to the lender's SVR
• Usually come with early repayment charges during the fixed term

Pros

• Budget certainty: Know exactly what you'll pay each month
• Protection from rises: Shielded if interest rates increase
• Peace of mind: No surprises in your mortgage payments

Cons

• No benefit from falls: Won't save money if rates drop
• Exit restrictions: ERCs make switching expensive
• Often higher initial rate: Premium for the security

Tracker Mortgages

Tracker mortgages follow the Bank of England base rate, moving up or down as the base rate changes.

How They Work

• Rate is expressed as base rate + margin (e.g., "base rate + 0.75%")
• Payments adjust when the Bank of England changes rates
• Available for fixed periods (2-5 years) or lifetime of mortgage
• Some have "collars" (minimum rate) or "caps" (maximum rate)

Pros

• Benefit from rate cuts: Payments fall when base rate drops
• Transparency: Easy to understand what determines your rate
• Often lower initial rates: Especially during stable rate periods
• Fewer restrictions: Usually no ERCs after initial period

Cons

• Exposure to rises: Payments increase when base rate goes up
• Budget uncertainty: Harder to plan when payments can change
• Collar traps: Some products have minimum rates you can't go below

Standard Variable Rate (SVR)

The SVR is each lender's default rate, applied when you're not on a specific deal.

How They Work

• Set by the lender (not directly linked to base rate)
• Typically higher than fixed or tracker rates
• Can change at any time at the lender's discretion
• No early repayment charges—complete flexibility

Why SVR Rates Are Higher

Lenders use higher SVR rates to encourage customers to take new deals (generating arrangement fees) or to increase margins on passive borrowers.

When SVR Makes Sense

SVR is rarely the best option long-term, but might suit you if:

• You're planning to sell soon
• You want maximum overpayment flexibility
• The difference from other products is minimal
• You can't get approved for a new deal

Discount Mortgages

Discount mortgages offer a reduction from the lender's SVR for a set period.

How They Work

• Rate expressed as "SVR minus X%" (e.g., "SVR - 1.5%")
• Your rate changes when the lender changes their SVR
• Different from trackers because SVR doesn't follow base rate exactly
• Less predictable than trackers

Pros and Cons

These are becoming less common. The main issue is unpredictability—lenders can change SVR whenever they choose, not just when the base rate moves.

Offset Mortgages

Offset mortgages link your savings to your mortgage, reducing the balance you pay interest on.

How They Work

• Your savings sit in a linked account
• Mortgage interest is calculated on: balance minus savings
• You don't earn interest on savings, but you don't pay mortgage interest on that amount

Example: £200,000 mortgage, £30,000 savings

• You pay interest on £170,000
• Savings work as if they're overpaying (but remain accessible)

See our offset mortgage strategy guide for a detailed analysis.

How to Choose the Right Rate Type

Consider these factors when deciding:

Your Risk Tolerance

If You're...	Consider...
Risk-averse, prefer certainty	Fixed rate
Comfortable with some risk	Tracker
Very flexible, planning to move	SVR (short-term only)

The Economic Outlook

• Rates expected to rise: Fixed rate locks in current levels
• Rates expected to fall: Tracker lets you benefit from drops
• Uncertainty: Fixed rate provides peace of mind

Your Plans

• Staying put long-term: Longer fixes can make sense
• Moving in 2-3 years: Match fix length to plans
• Uncertain timing: Shorter fixes or trackers offer more flexibility

Your Finances

• Tight budget: Fixed rate prevents payment shocks
• Financial cushion: Tracker risk is more manageable
• Large savings: Offset might be most efficient

Comparing Rates: What to Look For

The True Cost

Don't just compare headline rates. Consider:

• Arrangement fees: Often £500-£2,000, sometimes fee-free
• Valuation fees: May be free or up to £300+
• Total cost of ownership: Factor in all fees over the deal period

APRC

The Annual Percentage Rate of Charge (APRC) includes fees and the SVR period, helping compare true costs. However, it assumes you stay to term—most people remortgage.

Flexibility Features

• Overpayment allowances
• Payment holidays
• Portability to new property
• Borrowback facilities

When to Switch Rates

Before Your Deal Ends

Most lenders allow you to apply for a new deal 3-6 months before your current one ends. This locks in rates without immediate changes.

Using a Broker

A mortgage broker can:

• Search whole market for best rates
• Calculate true costs including fees
• Handle the application process
• Often costs you nothing (paid by lender)

Summary

Understanding mortgage rates helps you make better decisions and potentially save thousands. Fixed rates offer certainty, trackers offer potential savings when rates fall, and SVR should generally be avoided. Consider your circumstances, risk tolerance, and plans when choosing, and always review your options before your current deal ends.

For a direct comparison between the two most popular options, see our fixed vs tracker guide.