The situation
Two first-time buyers are considering a £460,000 home. One has £70,000 from savings and family support, while the other has £20,000. They want a joint mortgage and to understand how their different contributions should be recorded. Buying costs are additional.
What makes this more involved?
A lender’s joint mortgage assessment does not decide how the couple should divide beneficial ownership or protect contributions. The family’s money also needs to be clearly identified as a gift or another arrangement, with no undisclosed repayment expectations.
How I would approach it
Agree the mortgage brief
Review both incomes, commitments and a shared household budget. Discuss the responsibilities each applicant would take on and what happens if one income reduces.
Explain every part of the deposit
Separate personal savings from family funds. Establish the donor’s expectations and supply the lender and conveyancer’s required evidence.
Obtain ownership advice early
Ask the conveyancer about appropriate ownership arrangements and any declaration of trust. Make sure those arrangements remain compatible with lender requirements.
What could change the plan?
Can a private family repayment promise be omitted?
No. If money is repayable or creates an interest in the property, that must be disclosed accurately.
Does paying a bigger deposit reduce responsibility for the mortgage?
Do not assume that. Mortgage liability and private ownership shares are different matters that need to be understood with the adviser and solicitor.
What this would establish
Align the mortgage application, family funding and legal ownership discussions before expectations become difficult to change.
Should unequal deposits be discussed with the conveyancer?
Yes. Get advice on ownership and any documentation needed, while keeping the lender informed of the actual arrangement.
Link to this answerEducational content reviewed 9 October 2026. Individual advice requires an assessment. Lender and policy criteria can change.
Further reading: MoneyHelper: buying a home. These references provide background information; they do not indicate acceptance of this example.