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IMLA’s Guide on Mortgage Rates in the Mortgage Market

IMLA s new guide clarifies the impact of swap rates on fixed-rate mortgages, important for borrowers and brokers navigating recent market changes.

By David Sampson
15 June 2026
3 min read
UK mortgage rates article image for IMLA s Guide on Mortgage Rates in the Mortgage Market

TL;DR

  • Swap rates have risen sharply, impacting fixed-rate mortgage pricing.
  • borrowers and brokers should understand these changes to navigate the mortgage market effectively.

Written by David Sampson for Mortgage118. Last updated 15 June 2026. Reviewed against our editorial standards. Editorial standards. Mortgage118 is a directory — not FCA-authorised and not a mortgage adviser.

The Intermediary Mortgage Lenders Association (IMLA) has released a new report and a concise guide aimed at helping mortgage advisers understand the significance of swap rates in fixed-rate mortgage pricing. This initiative comes in response to the recent volatility in swap rates, which surged due to geopolitical tensions involving the US, Israel, and Iran.

What are Swap Rates and Why Do They Matter?

Swap rates are important in determining the cost of fixed-rate mortgages. They represent the interest rate at which lenders can exchange fixed payments for floating payments. When swap rates increase, lenders typically pass these costs onto borrowers through higher fixed mortgage rates. For instance, between early March and May 2026, two-year swap rates climbed from approximately 3.6% to over 4.5%, leading to an increase in average two-year fixed mortgage rates from 3.97% to 5.14%—a rise of more than 1.1 percentage points.

Who is Affected by These Changes?

The recent fluctuations in swap rates primarily impact borrowers seeking fixed-rate mortgages and mortgage brokers advising clients. As fixed-rate pricing closely follows swap rates rather than the Bank Rate, understanding these dynamics is essential for both parties. Tracker mortgage rates, which are directly linked to the Bank Rate, remain unaffected by these changes, providing some stability for those on this type of mortgage.

What This Means for the Mortgage Market

For borrowers, the rise in fixed mortgage rates signals a need for careful consideration when choosing mortgage products. Those looking to secure a fixed-rate deal may face higher costs than before. Brokers should be prepared to explain these changes to clients, ensuring they understand the implications of rising swap rates on their mortgage options. The IMLA’s publications aim to demystify swap rates, making it easier for advisers to navigate the evolving mortgage market. For more insights, check out our current mortgage rates.

Frequently Asked Questions

How do swap rates impact my mortgage?

Swap rates influence the pricing of fixed-rate mortgages; when they rise, lenders typically increase fixed mortgage rates, affecting your borrowing costs.

What should I consider when choosing a mortgage now?

Given the recent rise in fixed mortgage rates, consider your financial situation carefully and consult with a broker to explore your options in the current market.

About David Sampson

David Sampson writes about the UK mortgage market for Mortgage118, covering specialist lending, market trends, and practical advice for borrowers. All content is reviewed for accuracy against FCA guidelines and current market data.

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