The 2-year fix in plain English
You lock the rate for 24 months. At the end you remortgage to a new product — either with the same lender (product transfer) or a different lender (full remortgage). The fixed term sets your monthly payment and protects against base-rate rises, but exposes you to whatever the market does after 24 months. ERCs are smaller and shorter — typically 2% in year 1 and 1% in year 2.
The 5-year fix in plain English
The rate is locked for 60 months. Monthly payments are unchanged for five years regardless of what the Bank of England does. ERCs are larger and longer — commonly 5% sliding to 1% over the five years. If you don't move or remortgage early, the 5-year fix is the simpler, lower-stress option.
How 2026 pricing actually compares
For most of the last decade, the 5-year fix carried a small rate premium over the 2-year — you paid a little more in exchange for longer certainty. In late 2025 and into 2026 that relationship has flipped. The swap curve (the cost lenders pay to hedge fixed-rate products) inverted, meaning 5-year swaps are pricing slightly below 2-year swaps. Result: at common LTV bands, the 5-year fix is now often the cheaper of the two.
Indicative 2026 pricing at 75% LTV residential:
- 2-year fix: around 4.55%–4.85%
- 5-year fix: around 4.30%–4.65%
- Tracker (base + 0.6%): around 4.60%
Numbers shift weekly. Always pull live pricing.
When the 2-year fix is the right call
- You believe rates will fall meaningfully over the next 24 months.
- You may move home or trade up within the next 2–3 years.
- You expect a major income change (going self-employed, going on maternity/paternity leave) that will affect future affordability.
- The 2-year rate is materially below the 5-year and you're willing to take the renewal risk.
- You want flexibility to overpay aggressively and clear the mortgage early.
When the 5-year fix is the right call
- You're settled in the property and don't expect to move in the next 5 years.
- You value certainty over optionality.
- The 5-year is currently priced at or below the 2-year (as in 2026).
- You want to avoid mortgage admin and re-broker fees in 24 months.
- You worry about rate volatility and prefer a single fixed payment to budget around.
The cost of getting it wrong
Worked example on a £300,000 mortgage:
- You take a 5-year fix at 4.50%, then need to move and redeem in year 2.
- ERC at 4% × £291,000 (rough balance) = approximately £11,640.
- You take a 2-year fix at 4.75% and rates fall to 3.75% over the period.
- You pay roughly £170 a month more than you would have on the 5-year, or about £4,080 over 24 months.
The 5-year ERC risk is materially larger than the 2-year opportunity cost — which is why "are you actually staying put?" is the most important question to answer first.
Hybrid strategies
- 5-year fix + overpayments. Use the 10% annual overpayment allowance to clear capital aggressively. Combines low rate with capital reduction.
- Two 2-year fixes back-to-back. Suits borrowers expecting falling rates — but adds remortgage friction and fees.
- Split mortgages. A small number of lenders allow part of the loan on a 2-year and part on a 5-year. Useful for borrowers who can't choose.
Pros
- 5-year fix gives 5 years of payment certainty.
- 2-year fix gives flexibility if rates fall or life changes.
- Either option protects against rate rises during the term.
- Both typically allow 10% annual overpayment penalty-free.
- Both are usually portable if you move (subject to re-underwriting).
Cons
- 5-year ERCs of 5% in early years can cost thousands if you move or remortgage early.
- 2-year fix exposes you to renewal at whatever rate the market then offers.
- Hybrid strategies add complexity and broker fees.
- Wrong choice can cost more than the rate difference.
- Swap-curve shifts can flip the cheapest option mid-decision.