Should I sort my next mortgage before I sell my house?
Published 20 October 2026 · 6 min read · By Evren Ergin
Yes, start on the mortgage before you list: get an agreement in principle and a clear view of your options now, then apply in full and secure a rate as soon as you agree a sale. Mortgage deals stayed on sale for an average of only 13 days in September 2026, so a mover who waits for a buyer before thinking about borrowing can find the rate they planned around has gone.
TL;DR
- •Most sellers are also buyers, so the next mortgage decides what you can afford to move to, and whether the move works at all.
- •Moneyfacts put the average two-year fix at 5.93% and the five-year fix at 5.95% in October 2026, up from 5.59% and 5.63% a month earlier.
- •Mortgage deals stayed on sale for 13 days on average in September 2026, against 43 days in 2019, according to Moneyfacts.
- •Purchase mortgage offers typically last three to six months, while the average sale takes 154 days from agreement to completion, so the timing is tighter than most movers expect.
Advertisement
If you are thinking of selling, you are probably thinking of buying too. Your sale price sets your deposit and your next mortgage sets your budget. You need both figures before you can tell whether a move adds up.
An agreement in principle is a lender's written statement of how much it may be willing to lend you, based on your income, outgoings and credit record. It is not a mortgage offer and it does not commit you or the lender to anything.
Why does the mortgage matter before I have even listed?
Because the market is moving quickly. On 19 October 2026 Moneyfacts reported that lenders are pulling and repricing deals at a record pace, and Rightmove said the typical two-year fixed rate had risen to 5.55%, from 4.25% before February, adding around £250 a month to a typical new mortgage.
The mortgage market a seller is moving into, October 2026
| Measure | Latest | A month or more earlier | Source |
|---|---|---|---|
| Average two-year fixed rate | 5.93% | 5.59% (September 2026) | Moneyfacts, 19 Oct 2026 |
| Average five-year fixed rate | 5.95% | 5.63% (September 2026) | Moneyfacts, 19 Oct 2026 |
| Average new mortgage rate | 5.83% | 5.55% (September 2026) | Moneyfacts, 19 Oct 2026 |
| Average time a deal stays on sale | 13 days (September 2026) | 20 days in 2025, 43 days in 2019 | Moneyfacts, 19 Oct 2026 |
| Number of mortgage deals available | 8,696 | 7,516 (September 2026) | Moneyfacts, 19 Oct 2026 |
| Typical two-year fix on Rightmove's measure | 5.55% | 4.25% before February 2026 | Rightmove, 19 Oct 2026 |
Read plainly: there are more deals than a month ago, but each one is more expensive and lasts a fortnight on average. A rate you saw in the summer is not a rate you can count on now.
How do I line up my next mortgage before I sell?
1. Find out what your home is worth today
Your likely sale price, less your current mortgage and selling costs, is the deposit you will take to the next home, so get a current valuation before anything else.
2. Check the terms of your current mortgage
Look up the end date of your deal, any early repayment charge for leaving it, and whether it can be ported, which means moved to your new home with the same lender.
3. Get an agreement in principle
Ask a mortgage broker or lender for an agreement in principle on the borrowing you expect to need, and ask whether it uses a soft or a hard credit search.
4. Plan with a buffer
Work out your budget at a rate a little above today's average, so a rise between now and your application does not break the move.
5. Apply in full as soon as you agree a sale
Once a buyer is found and you have chosen your next home, apply straight away, because deals lasted 13 days on average in September 2026 and the one you want may not be there next month.
6. Check the offer expiry against your likely completion date
Purchase offers typically last three to six months, while the average sale takes 154 days from agreement to completion, so ask your lender how extensions work before you need one.
7. Keep your finances steady until completion
Avoid new credit, large purchases or a change of job where you can, because the lender may check again before releasing the money.
Your sale price and your next mortgage are one decision, so get both figures before you list.
What is normal, and what needs attention?
| What happens | Is it normal? | What to do |
|---|---|---|
| The rate on your agreement in principle changes before you apply | Normal | An agreement in principle does not fix a rate; budget with a buffer. |
| The deal you planned around is withdrawn | Common in 2026 | Ask your broker for the nearest alternative and apply promptly next time. |
| The lender asks for fresh payslips or bank statements | Normal | Lenders re-check before a full offer and sometimes before completion. |
| Your offer will expire before your likely completion date | Needs attention | Ask the lender now about an extension and tell your solicitor. |
| You would pay an early repayment charge to leave your current deal | Needs attention | Check whether porting avoids it before you agree a sale. |
Should I wait for rates to fall before I sell?
Nobody can time that reliably. Rates have risen from 4.25% to 5.55% on Rightmove's measure since February, and the Autumn Budget on 28 October 2026 could move them in either direction.
If you sell and buy in the same market, higher rates affect your buyer and your own next purchase. What changes most is how much you need to borrow, so the size of the step up matters more than the timing.
Where does a valuation fit in?
First. Without a realistic sale price you cannot know your deposit, and without your deposit an agreement in principle is a guess. The most useful figure is what local agents would actually market your home at today.
ValuQ gives UK homeowners free, side-by-side property valuations from competing local estate agents. You describe your home once, compare every figure on one screen, and agents never get your details until you choose. It is free, always.
This article is general information, not mortgage advice. A qualified mortgage broker can compare deals and tell you what you are likely to be offered.
Common questions about mortgages when you are selling
Can I get a mortgage before I have sold my house?
You can get an agreement in principle before you sell, and many movers do. A full mortgage offer for your next home usually depends on your sale going through, because the lender needs to know where your deposit is coming from.
Does an agreement in principle affect my credit score?
It depends on the lender. Some use a soft credit search, which other lenders cannot see, and some use a hard search, which shows on your file. Ask which before you apply, and avoid making several hard applications in a short time.
How long does a mortgage offer last?
Purchase mortgage offers typically last between three and six months, and some lenders will extend one if a sale is delayed. Your offer document states the exact expiry date, so check it against your expected completion date.
Can I keep my current mortgage when I move?
Often, yes. Porting means moving your existing deal to your new home with the same lender. The lender re-checks your income and the new property, and any extra borrowing is usually at today's rates.
Should I fix for two years or five?
In October 2026 the two are almost the same price, at 5.93% and 5.95% on Moneyfacts' averages. The choice depends on how long you expect to stay and how much certainty you want, which a broker can talk through with you.
Sources
- [1]Property Industry Eye, Mortgage rates jump again as lenders pull deals at record pace (Moneyfacts data) · 2026-10-19 · https://propertyindustryeye.com/mortgage-rates-jump-again-as-lenders-pull-deals-at-record-pace/
- [2]Property Industry Eye, More than 3,000 asking prices slashed every day as sellers face reality (Rightmove House Price Index, October 2026) · 2026-10-19 · https://propertyindustryeye.com/more-than-3000-asking-prices-slashed-every-day-as-sellers-face-reality/
- [3]Property Industry Eye, Estate agents face longest wait on record to get paid (Rightmove analysis) · 2026-07-31 · https://propertyindustryeye.com/estate-agents-face-longest-wait-on-record-to-get-paid/
- [4]Rook Matthews Sayer, How long does a mortgage offer last? · 2025-11-08 · https://www.rookmatthewssayer.co.uk/2025/11/08/how-long-does-a-mortgage-offer-last
- [5]Office for Budget Responsibility, Autumn 2026 forecast date announced · 2026-07-31 · https://obr.uk/autumn-2026-forecast-date-announced/
Terms in this article
Plain-English definitions from the ValuQ property glossary.
Mortgage broker
A mortgage broker is a regulated adviser who finds and arranges a mortgage on your behalf from the lenders they can access.
Completion date
The completion date is the contractual day the sale must complete, fixed at exchange and binding on both sides.
Mortgage offer
A mortgage offer is the lender's formal, binding commitment to lend, issued after full underwriting and valuation.
Additional property surcharge
The additional property surcharge adds 5 percentage points to every stamp duty band when the purchase leaves you owning more than one dwelling.
Porting
Porting is taking your existing mortgage deal with you to a new property when you move, avoiding early repayment charges.
Read next
Related insights
What happened to house prices after the last nine Budgets?
Rightmove October 2026: prices up 1%, but 1 in 3 homes cut
Which homes are selling fastest right now, and is mine one?
What should an estate agent's marketing plan include?
What is your home worth today?
ValuQ gives UK homeowners free, side-by-side property valuations from competing local estate agents. Anonymous until you choose. No cold calls.
Get your free anonymous valuationSellers and buyers never pay.