Lender small print, sourced and dated
Barclays: the mortgage dates and limits that cost money
These are the Barclays rules that decide when overpaying is free, when leaving is cheaper, and how early your next deal can be locked. Every figure links to the lender's own published page with the date we last checked it — and where their public pages don't confirm a detail, we say so instead of guessing.
| Penalty-free overpayment allowance | Not verified to a primary source — the market-standard 10% a year assumption applies until we can. |
|---|---|
| Early-lock (product transfer) window | ~3 months before your deal ends · industry guide, checked 2026-08-15 |
| Overpaying beyond the allowance | The excess is normally charged at your deal's early repayment charge rate — the percentages and step-down dates are in your mortgage offer. |
| Not confirmed by Barclays's public pages | overpayment allowance. We show the market assumption for these rather than invent a figure. |
Turn the rules into your dates
Rules only save money on the days they apply to your own deal: the day the allowance resets, the day the charge steps down, the day the lock window opens. Work out your remaining Barclays allowance free, or build your full timeline in two minutes. A watch then emails you before each date — £7.99, once, no commission from Barclays or anyone else.
Frequently asked questions
How much can I overpay on a Barclays mortgage without a charge?
We have not been able to verify Barclays's current published allowance to a primary source, so we don't quote one. The market-standard rule is 10% of the balance each year; your offer document states yours exactly.
How early can I lock a new deal with Barclays?
Barclays's product-transfer window opens about 3 months before your current deal ends — you can select a new deal that starts when the old one finishes, and remortgaging elsewhere typically allows up to 6 months.
WatchMyMortgage is independent and takes no commission from Barclays or any lender. Rules summarised from the linked public pages on the dates shown; lenders change terms, and your mortgage offer is the definitive statement of yours. This is information, not financial advice; for advice on your circumstances, speak to a mortgage adviser regulated by the FCA.