Early Repayment Charges Explained: UK Mortgage ERC Guide 2026

Quick Answer: How Much Is an Early Repayment Charge?

The exact figures depend on your lender and product. Halifax, Nationwide, Santander, NatWest, Barclays, and Lloyds all use sliding percentage scales similar to the above. A handful of lenders (Coventry BS, First Direct) use lower scales or fixed-period ERCs. Some specialist products — particularly trackers and offset mortgages — come with no ERC at all, in exchange for a slightly higher headline rate.

How ERCs Are Calculated in 2026

The calculation is simple in principle: ERC = current outstanding mortgage balance × the ERC percentage for the year you're in. Examples:

Scenario	Year of deal	ERC %	Balance	ERC due
5-year fix, exiting year 1	1	5%	£250,000	£12,500
5-year fix, exiting year 3	3	3%	£235,000	£7,050
2-year fix, exiting year 1	1	2%	£180,000	£3,600
10-year fix, exiting year 4	4	5%	£300,000	£15,000

The percentages are written into your mortgage offer document. To find yours, look at the original offer letter you received when your current deal started, or download a copy from your lender's online banking. The ERC schedule is usually on page 2 or 3 in the 'Fees and charges' section. If you can't find your offer, your lender's contact centre can confirm your current ERC on request — they're legally required to tell you.

Alternative ERC structures (less common in 2026):

• Flat percentage throughout the term. Some specialist lenders charge a single fixed rate (e.g. 4%) for the entire deal period rather than sliding annually.
• Months' interest. A handful of lenders charge a number of months' interest at the current rate (e.g. 6 months) rather than a balance percentage. Works out similar in practice but can be cheaper if you're early in a high-rate deal.
• Pence-per-pound (older mortgages). Some pre-2008 deals still on the books use a 'pence per £1,000 borrowed' formula. Rare now, but check if your mortgage is from that era.

The 10% Annual Overpayment Allowance

Almost every UK mortgage deal in 2026 lets you overpay up to 10% of the outstanding balance per year without triggering any ERC. This is one of the most underused features of UK mortgages. Used consistently, it can take years off your term and save tens of thousands in interest.

How the 10% allowance works in practice:

• The 10% is usually calculated against the balance at the start of each year (either calendar year or your mortgage anniversary — check which)
• You can pay it in one lump or spread across the year as regular overpayments
• Some lenders only allow it via standing order or one-off bank transfer — direct debit increases sometimes don't count
• If you go even £1 over the allowance, the entire excess (not just the overage above 10%) can trigger an ERC at some lenders — though most apply it only to the excess. Read the small print or call before overpaying close to the limit

Example: On a £200,000 mortgage with a 5% ERC, you can overpay £20,000/year (10%) penalty-free. Overpay £25,000 in a year and the £5,000 excess incurs a 5% ERC = £250. Overpay strategically right up to the 10% line and you can reduce a £200,000 balance to ~£162,000 in 2 years (with normal monthly payments), saving roughly £8,000-£12,000 in lifetime interest depending on your rate.

Lender-specific allowances:

Lender	Annual overpayment allowance
Halifax, Nationwide, Santander, Barclays	10% of outstanding balance per year
NatWest, Lloyds	10% of original loan amount per year
First Direct	Unlimited overpayments, no ERC
Coventry Building Society	10% of outstanding balance per year
HSBC	10% of outstanding balance per year
Offset mortgages (most lenders)	Unlimited via offset account

When ERCs Apply (and When They Don't)

ERCs are triggered by three specific actions during your fixed or tracker deal period:

1. Remortgaging to a different lender — you're paying off the entire current loan, which triggers the full ERC on the balance.
2. Selling your home and not porting — same as above; the mortgage is fully repaid.
3. Overpaying beyond your 10% annual allowance — ERC applies to the excess.

ERCs do not apply in these scenarios:

• Regular monthly mortgage payments. Your scheduled monthly payments never trigger an ERC, regardless of how far through the deal you are.
• Overpayments within your 10% annual allowance. Use it freely.
• Switching to a new product with the same lender (product transfer) in most cases — many lenders waive ERCs for internal switches if you do it within 6 months of your current deal ending. Some allow it earlier (Nationwide and Coventry are most generous here). Always check.
• After your deal period ends. Once you've rolled onto your lender's SVR or your new fixed deal starts, the original ERC no longer applies.
• Porting your mortgage when moving home — if your lender approves the port, the ERC is waived on the old property, though it transfers to the new mortgage on the new property.
• Bereavement / mortgage taken on by surviving partner — most lenders waive ERCs in these circumstances by policy.

The product transfer loophole. Many borrowers don't realise that switching to a new deal with your existing lender (a 'product transfer') often avoids ERCs entirely, even if you do it before your current deal ends. The catch: you're locked into the same lender, so you can't shop the market. If your current lender's new rates are competitive, this can save thousands. If not, paying the ERC to remortgage elsewhere may still be worth it.

Is It Worth Paying the ERC to Remortgage Early?

This is the most common ERC question, and the answer depends entirely on the maths. The decision rule is straightforward: if the savings from the new deal over the new deal period exceed the ERC plus remortgage costs, switching is worth it. Here's how to work it out.

Example: £200,000 mortgage, 2 years left on 5.99% fix, considering switching to a 4.39% 5-year fix

Component	Amount
Current monthly payment (£200k, 5.99%, 25 yrs)	£1,287/month
New monthly payment (£200k, 4.39%, 25 yrs)	£1,094/month
Monthly saving	£193/month
Saving over 24 months until current deal would have ended	£4,632
ERC (3% on £200k)	£6,000
Remortgage costs (legals, valuation, arrangement fee)	£1,000-£1,500
Net result over 2 years	£2,868 LOSS
Saving over full 5-year new deal vs current deal	£193 × 60 = £11,580
Net result over 5 years	£4,080 SAVING

The answer depends on your time horizon. Over 2 years (your current deal's remaining term), switching costs you money. Over 5 years (the new fix's full term), you save £4,000+. But this assumes the rates available when your current deal ends will be similar to today — if rates fall further, holding on becomes more attractive.

Decision shortcut: Calculate (ERC + remortgage costs) ÷ monthly saving = break-even months. If you'll be on the new deal longer than that, switching wins. In the example above: (£6,000 + £1,500) ÷ £193 = 39 months. The new 5-year fix runs 60 months. Net winner.

A mortgage broker can run this calc properly using exact current product fees and your specific ERC schedule. Don't rely on rough estimates for a decision of this size.

Mortgages Without ERCs

A small but useful category of UK mortgages comes without any ERC. These give you total flexibility — overpay as much as you want, switch anytime, sell without penalty. The trade-off is a slightly higher headline rate, typically 0.2%-0.7% above the equivalent fixed deal with ERCs.

ERC-free product types in 2026:

• Lifetime tracker mortgages from Coventry BS, Skipton, First Direct, and HSBC — track Bank of England base rate for the full term, no ERC.
• Standard variable rate (SVR). No ERC, but rates are generally 2-4% above market — only useful as a short-term holding state, not a long-term plan.
• Discount variable rates from select building societies — some have no ERC, though most do.
• Offset mortgages (some lenders) — the offset account effectively provides unlimited 'overpayment' without redeeming the loan, sidestepping the ERC question entirely.
• First Direct's standard fixed rates — uniquely in the UK market, FD allows unlimited overpayments on fixed-rate products with no ERC.

If you anticipate selling, receiving a large inheritance, getting a bonus, or just want maximum flexibility, the cost of an ERC-free deal can be worth paying. For most borrowers planning to stay in their home and not overpay heavily, a standard fixed deal with the 10% allowance gives the best balance of rate and flexibility.

Can You Negotiate or Refund an ERC?

ERCs are contractual — once your mortgage offer is signed, the ERC schedule is fixed. Lenders rarely negotiate ERCs in normal circumstances. However, there are five situations where an ERC can be reduced, waived, or refunded:

1. Bereavement or critical illness. Most lenders waive the ERC if the named borrower dies or is diagnosed with a critical illness during the deal period. Some extend this to redundancy. Check your lender's vulnerable customer policy.

2. Lender error or mis-selling. If your original mortgage adviser failed to properly disclose the ERC, or if the ERC was incorrectly applied (wrong percentage, wrong year, calculation error), you have grounds for refund. Raise a formal complaint with the lender first; escalate to the Financial Ombudsman Service if not resolved within 8 weeks.

3. Porting. If you're moving house, request porting — the ERC is waived on the original property if the port is approved.

4. Product transfer. Switching internally to a new deal with the same lender often waives the ERC, especially within 6 months of your current deal ending.

5. Lender goodwill (rare). A small number of customer complaints succeed in getting partial ERC reductions on goodwill grounds, particularly if you're a long-standing customer with no payment issues and have been treated unfairly. Don't count on this, but it's worth asking through a formal complaint if you have specific grievances.

If you think you've been wrongly charged an ERC, the complaints process is: (1) write to the lender, (2) wait 8 weeks for response, (3) escalate to the Financial Ombudsman Service (free, independent, binding on the lender for awards up to £415,000 in 2026). The FOS sided with consumers in roughly 38% of mortgage-related complaints in 2024-25.