Ditch Your Fixed Rate Mortgage Early: What You Need to Know
Verdict
With a net saving of £1,292 after ERC and switch costs, ditching your 6.2% fix now for 4.2% is the stronger move.
Confidence: Medium
Break point: This verdict holds while the rate gap stays above 2.0pp and ERC remains at 0.5% or below. If rates rise or ERC increases, the case weakens.
The exit cost decision
Ditching only makes sense when the gross saving over the remaining term exceeds the ERC and switch costs.
Ditching your current 6.2% fixed rate mortgage for a 4.2% rate is the clear choice, as the 2.0 percentage point gap translates into substantial monthly savings that outweigh the one-time early repayment charge (ERC) and switching costs. With a net saving of £1,292 after accounting for these costs, the immediate reduction in interest payments from the lower rate will enhance your cash flow significantly over the term of the mortgage. This decision not only improves your financial position but also mitigates the long-term impact of higher interest payments, making the switch a financially sound strategy.
The rate backdrop
Borrowers who fixed at the 2022-23 peak are paying well above current market rates, so the case for exiting has strengthened.
Since 2021, the Bank of England's rate rises have significantly impacted borrowers on high fixed rates, with 2-year fixed rates climbing 2.75 percentage points from historic lows, making existing high fixed rates increasingly burdensome. For those locked into a 6.2% fixed rate, switching to a 4.2% rate not only offers immediate savings but also positions borrowers to benefit from lower overall interest payments in a rising rate environment. With a net saving of £1,292 after early repayment charges and switching costs factored in, the financial rationale is clear: transitioning to a lower rate is a stronger move that enhances cash flow and reduces long-term debt servicing costs.
Worked example
Assumptions (illustrative): £200,000 mortgage · 6.2% current fix · 4.2% available rate · 12 months remaining · 0.5% ERC
| Item | Amount |
|---|---|
| Monthly saving | £216/month |
| Gross saving over 12 months | £2,592 |
| Early repayment charge (0.5%) | −£1,000 |
| Switch costs | −£300 |
| Net saving | £1,292 |
Ditching the fix saves £1,292 net — the exit costs are recovered in 6.0 months.
This flips if rates rise before you complete the switch, or if your lender applies additional exit fees not included above.
When this flips
This flips only when the net saving after ERC and switch costs exceeds the break-even threshold. Below this threshold, the certainty of staying in the fix wins.
What to do next
| Your situation | Action | Why |
|---|---|---|
| Rate gap is large and ERC is low | Ditch the fix | £216/month saving over 12 months clears the exit costs with margin to spare |
| You are certain you will stay in the property | Ditch the fix | No portability risk — the full saving accrues to you |
| Rates may fall further before switching | Ditch now and refix at the lower rate | Waiting loses the monthly saving — act while the gap is wide |
| Uncertain about your plans | Check ERC portability before committing | A move within 12 months could negate the saving entirely |
Sources and provenance
- boe_mpr_2026_02.pdf
- boe_mpc_2026_03.pdf
Data as of: 2026-04-01
