The 2026 Remortgage Squeeze: The ‘Do-Nothing’ Mistake Costing Homeowners Hundreds a Month

9 June 2026

With around 1.8 million fixed-rate mortgages set to expire in 2026, a growing number of households face a costly decision point and, for many, the biggest financial mistake won’t be choosing the wrong deal, but doing nothing at all, as the team over at Speedy Remortgage will show.

For years, fixed-rate mortgages have offered borrowers certainty and protection from market volatility, though as we move through 2026, that certainty is unravelling for a record number of homeowners. Deals secured during the ultra-low rate era of 2020-2022 are now expiring, and borrowers are being thrust into a very different lending landscape.

The headline concern has been rising interest rates, yet industry data suggests that the real financial sting lies elsewhere. It’s what brokers are calling the ‘do-nothing penalty’, that is, the cost of automatically drifting onto a lender’s SVR or accepting a poor product transfer without shopping around.

For many households, that decision, or rather a lack of one, means paying hundreds of pounds more each month.

A Case Study in Inaction

Consider the case of a homeowner coming off a five-year fixed deal secured in 2021.

Original mortgage: £250,000
Fixed rate: 1.8%
Monthly payment: ~£1,035

As their deal expires in 2026, they are presented with three broad options:

Do nothing and revert to SVR

SVRs across major lenders currently sit between 7.5% and 8.5%.

New monthly payment: ~£1,850
Increase: +£815/month

Accept a lender’s product transfer (no advice)

Many lenders offer existing customers a switch deal, which is slightly below SVR but not always market-leading.

Rate: ~5.5%-6.2%
New monthly payment: ~£1,420
Increase: +£385/month

Remortgage to a competitive market deal

By comparing across the whole market, borrowers will secure more competitive rates.

Rate: ~4.7%-5.2% (depending on LTV and profile)
New monthly payment: ~£1,310
Increase: +£275/month

The difference between doing nothing and actively remortgaging is roughly £500 per month, implying £6,000 a year.

The Scale of the Problem as Seen in Broker-Wide Trends

Across the UK mortgage market, broker insights point to a consistent pattern:

SVRs remain significantly higher than both new business rates and product transfer rates, specifically by 2-3 percentage points.
A large proportion of borrowers default onto SVRs, even if only temporarily, in some cases due to inertia, in others due to lack of awareness.
Product transfers are increasingly common, albeit not always competitive when compared to whole-of-market options.

Broker network data suggest that:

Around 27% of borrowers drift onto SVRs after their fixed deal ends.
One in five remain there for several months, effectively overpaying before taking action.
Borrowers who switch without advice miss out on lower rates available elsewhere, especially those with improved LTV ratios.

This is where the ‘do-nothing penalty’ becomes most acute. Even a short period, say, three months on an SVR, could cost a household over £2,000 unnecessarily.

“I’m Coming Off My Fix – What Happens If I Do Nothing?”

If no action is taken before a fixed-rate mortgage expires, lenders will automatically move the borrower onto their SVR. There’s no renegotiation, no reassessment, just a default rate that is far higher than competitive deals.

While SVRs offer flexibility (no early repayment charges, for instance), they are rarely intended as a long-term option. Instead, they function as a holding position, one which becomes expensive very quickly.

What’s more, borrowers generally assume their lender will offer them the best available deal. In reality, lenders are under no obligation to provide their most competitive rates through product transfers, and these deals are priced differently from those offered to new customers.

Why 2026 is Different

The scale of the issue in 2026 is unprecedented. During the pandemic, historically low interest rates drove a surge in fixed-rate borrowing. Millions locked into two and five-year deals at rates below 2%. Now, those same borrowers are refinancing into a market where rates are more than double, or triple, what they were paying.

This creates higher base rates than the ultra-low era, a large volume of simultaneous expiries, and widespread borrower complacency or confusion paired with cost-of-living pressures reducing financial flexibility. In this environment, even small inefficiencies, like spending a few months on an SVR, has outsized financial consequences.

Behavioural Barriers: Why Borrowers Delay

Despite the clear cost differences, many homeowners still delay taking action, whether that’s down to the assumption that switching is complex or time-consuming, the belief that loyalty to their lender will be rewarded, uncertainty about eligibility and affordability under new rules, or simply procrastination, particularly if finances are already stretched.

However, the remortgage process has become substantially more streamlined in recent years in that decisions are secured quickly, and offers are locked in months before a deal expires.

The Cost of Inertia

The data clearly demonstrates that the biggest financial risk facing mortgage holders in 2026 is inaction, rather than just higher rates. Across different loan sizes and borrower profiles, the pattern is consistent:

SVR vs market deal gap: £300-£700 per month
Annual cost difference: £3,500-£8,000+
Short-term delay penalty (3 months): £1,000-£2,500

For households already under financial pressure, these sums represent the difference between financial stability and strain, as opposed to being marginal.

What Borrowers Should Be Doing Now

Owing to such a large wave of expiries, homeowners approaching the end of a fixed deal should therefore:

Review their mortgage at least 3-6 months before expiry
Check their current LTV, since rising property values unlock better rates
Compare whole-of-market options, not just their existing lender
Consider locking in a deal early, as many offers are able to be secured in advance
Seek advice where needed

The earlier borrowers act, the more options they’ll have, and so the less likely they are to fall into the SVR trap.

A Defining Year for Mortgage Holders

2026 is a defining moment for UK homeowners because, with millions coming off fixed deals, the collective financial impact will be significant, not just for households, but for the wider economy as well.

Yet within this challenge lies a clear takeaway, i.e., the most avoidable cost is also the most common. The ‘do-nothing’ mistake isn’t about making the wrong choice, it’s about not making one at all, which is a risk few can afford to take in a year where every pound counts.