Read in your language
Translations open in Google Translate. They are automatic and may contain errors. Check important mortgage wording with Jack in the original English.
A household can have enough equity on paper and still lack the cash needed on completion day. This fictional £3m purchase shows why the timing of a sale matters as much as the final mortgage amount. It compares a simultaneous move, selling first and a separately assessed temporary funding route.
One conversation to understand the property, the people and the plan.
Fictional worked example — not a client case or mortgage offer. Every person, figure and proposed route below is invented to explain the questions involved. No lender approval, achievable rate, saving or completed transaction is implied. Property purchases in these examples are assumed to be in England; other UK nations have different property taxes.
Consider each part together. The full picture determines which questions need resolving first.
A household with two established incomes wants to buy a £3m family home. Their current home is marketed at £1.5m, with a £650,000 mortgage. They expect selling and redemption-related costs of £50,000 in total, subject to confirmation. They have £1,100,000 accessible savings and a comfortable income on their initial budget, but have not yet obtained a full affordability assessment. A preferred purchase date arrives before a buyer for the existing home is ready.
At the assumed sale price, £1.5m less £650,000 debt and £50,000 costs gives £800,000 net equity. Add £400,000 from savings to produce a £1.2m contribution towards the new home. £1.2m plus the £1.8m mortgage pays the £3m price. The remaining £700,000 savings are allocated to an invented £500,000 purchase-cost allowance and £200,000 reserve. Those amounts use the £1,100,000 savings exactly. All costs need checking against actual taxes, fees and redemption figures.
If the sale has not completed, its expected £800,000 equity is not cash available for the purchase. The funding plan has a gap of that amount before any additional temporary-finance fees or interest. The seller accepting an offer on the old home does not remove this gap. Exchange, completion and receipt of net sale proceeds are different milestones.
Payment examples use an invented 5.5% annual interest rate, monthly payments and no fees added. The rate is held constant only to illustrate the maths; it is not a current product, quote or prediction. Figures are rounded to the nearest pound. Actual payments, interest calculations and available terms vary. A £1.8m repayment loan over 25 years at 5.5% would cost approximately £11,054 monthly. If the existing mortgage payment is an invented £3,500, those two payments total approximately £14,554 before temporary-finance charges, two sets of property costs and ordinary spending. At a hypothetical 7.5%, the new mortgage alone would be approximately £13,302. These examples do not establish affordability or the availability of overlapping loans.
Explore what each approach would need to establish. These are questions for assessment, not recommendations.
This uses sale proceeds at completion and may avoid a separate temporary loan. It depends on the whole chain, solicitor arrangements and lender conditions. Delays can affect removals, rate validity and the purchase timetable, so build a practical fallback rather than treating synchronisation as certain.
The deposit becomes known cash after redemption and costs, which can simplify the next purchase budget. Renting, storage and two moves add expense and disruption. Compare those costs with the cost and risk of temporary borrowing rather than dismissing renting as automatically wasted money.
A bridge might be considered for an eligible case, but it adds costs, security requirements and a time-limited exit. The £800,000 gap is net cash required, not necessarily the gross facility: fees or retained interest could mean a larger loan is needed. The proposed long-term mortgage and bridge lenders must accept the full structure. A hoped-for sale is not a guaranteed exit.
Obtain informed marketing and valuation evidence, the current mortgage redemption statement, charges and realistic sale costs. Identify title or property issues that could delay a buyer’s mortgage or conveyancing.
Create a dated completion schedule showing the old mortgage, new mortgage, any proposed bridge and available cash. Do not label the final £1.8m loan as the household’s total debt during an overlap.
Provide evidenced income, existing loans, spending and the reserve. If bridge interest is retained or rolled up, understand its effect on net proceeds and the amount ultimately repayable; it is still a cost.
At £1.35m, with the same £650,000 debt and £50,000 cost allowance, net equity falls to £650,000. That is £150,000 less than planned. Using savings to fill it would cut the stated £200,000 reserve to £50,000, before any added delay costs.
Extend the overlapping budget and any temporary-finance interest using actual terms. Check what happens at the bridge maturity and whether the long-term offer remains valid. A refinance or extension must not be assumed as the fallback.
Adjust the example to see how the amount, rate and term affect payments. This does not assess affordability or show an available mortgage rate.
Consider each part together. The full picture determines which questions need resolving first.
Map the funding sequence, assess available mortgage and specialist-finance routes within the agreed scope, and keep costs and dependencies clear.
The conveyancer manages the legal chain and completion funds; the agent supplies sale evidence; each lender makes its own decision. Tax advice is needed for the actual ownership and transaction timing.
Open each stage to understand the work involved. The sequence and timing depend on your circumstances and the lender’s assessment.
Use current redemption figures and realistic selling costs.
Distinguish expected events from binding arrangements.
Compare synchronising, selling first and any eligible temporary route.
Test a lower sale price and a materially longer sale period.
Agree the approach before committing to the purchase. No bridge, mortgage or completion outcome is promised in this fictional example.
A clear explanation of the circumstances is more useful than a wealth label or a headline borrowing figure.
It is not automatically accessible cash. It becomes available through a completed sale or a separately accepted funding arrangement, after relevant debt and costs.
Link to this answerNot necessarily. Net funds can be reduced by fees and interest deductions. Gross facility size, security, costs and exit must be assessed together.
Link to this answerNo. Sale timing and price are uncertain. The exit needs evidence and realistic stress testing; an extension or refinance is not guaranteed.
Link to this answerNo. This is an entirely fictional worked example. It is designed to clarify the funding sequence and does not represent a real client transaction or lender approval.
Link to this answerPrimary sources checked 17 October 2026. Lender criteria illustrate individual policies and can change; they are not a promise of availability or acceptance. Legal, tax and investment questions need the relevant specialist’s advice.
Start with where you live, the property, the borrowing required and your timing. I can explain the next useful step.
Your enquiry opens with this subject selected.
Your home may be repossessed if you do not keep up repayments on your mortgage.
General information, not a lending decision or personal recommendation. All borrowing is subject to eligibility, affordability, valuation and lender assessment. Illustrative scenarios are not completed client transactions. Mortgage advice is provided through Mortgage Force (UK) Ltd. Content updated 17 October 2026.