The Bank of Mum and Dad is now one of the UK's largest sources of first-time buyer deposit funding, and how a family contribution is structured, as a gift or a loan, changes almost everything about how the mortgage application, tax exposure, and long-term protection actually work. This guide covers why lenders insist on a genuine gift rather than a loan, what a gifted deposit letter needs to say, the Inheritance Tax 7-year rule, and the declaration of trust mechanism that can protect a gift without breaking the lender's requirements.
Figures below reflect Savills Bank of Mum and Dad research and published 2026 conveyancing and mortgage broker guidance, current to mid-2026. This is general information, not legal, tax, or financial advice; a solicitor and tax adviser should review any significant family contribution.
- The scale of the Bank of Mum and Dad in 2026
- Gift versus loan: the affordability impact
- What a gifted deposit letter needs to say
- The Inheritance Tax 7-year rule
- The deprivation of assets risk for the giver
- The declaration of trust: protecting the gift without it being a loan
- Alternatives to a straight cash gift
- Frequently asked questions
1. The scale of the Bank of Mum and Dad in 2026
Savills research found the Bank of Mum and Dad provided £38.5 billion in assistance over the preceding four years, 71% more than the four years before that, with average parental contributions now around £55,572 per transaction. Assisted first-time buyers now average deposits of £118,073, compared with £86,000 for unassisted buyers, and tend to be younger and buying more expensive properties as a result. In London specifically, average deposits represent 138% of a typical first-time buyer's income, underlining just how central family support has become to getting onto the ladder in the most expensive markets.
2. Gift versus loan: the affordability impact
For a lender to accept third-party deposit funds without penalty, the money must be a genuine gift, with no expectation of repayment and no legal claim on the property. If the arrangement is structured, or disclosed, as a loan instead, lenders treat it as a monthly outgoing in the affordability assessment. A £20,000 loan repaid over 10 years can add roughly £170 a month in debt service, which alone can reduce overall borrowing capacity by approximately £25,000 to £35,000. This is precisely why most families that intend to help structure the arrangement as a gift for lending purposes, sometimes with a private, informal understanding about repayment if circumstances allow, rather than a formal loan the lender has to factor in.
3. What a gifted deposit letter needs to say
A gifted deposit letter typically needs to state the donor's name and address, their relationship to the buyer, the amount being gifted, and clear confirmation that no repayment is expected and the donor has no legal claim on the property. Most lenders provide their own template, or the buyer's conveyancer will issue one. Donor categories accepted vary by lender, but parents, step-parents, grandparents, siblings, spouses, and civil partners are almost universally accepted; aunts, uncles, and in-laws are usually accepted but occasionally scrutinised more closely.
4. The Inheritance Tax 7-year rule
A gifted deposit isn't taxed immediately, and any amount can be gifted tax-free at the point of transfer. However, if the donor dies within seven years of making the gift, and their estate exceeds the available nil-rate band and annual exemptions (£3,000 a year, with one unused year's allowance carried forward), the gift can be counted back into their estate for Inheritance Tax purposes, on a sliding taper scale that reduces the liability the longer the donor survives past the date of the gift. For gifts above roughly £50,000, a brief conversation with a tax adviser about the giver's own estate and available allowances is genuinely worth the modest cost.
5. The deprivation of assets risk for the giver
If a parent who has made a significant gift later needs means-tested care funding, the local authority can look back at their financial history, and if the gift is judged to have been made specifically to reduce their assets ahead of needing care, it can be treated as a deliberate deprivation of assets. Our Care Home Funding and Property guide covers this mechanism, and its lack of any fixed time limit, in full detail; it's a genuinely important consideration for any parent making a large gift later in life rather than earlier.
6. The declaration of trust: protecting the gift without it being a loan
Many families satisfy the lender's requirement for a genuine, unconditional gift while separately arranging a declaration of trust between the buyer, any co-owner, and the parents, recording that the specific contribution is intended to be ring-fenced rather than treated as shared equity. The two aren't contradictory: the gift letter tells the lender the money carries no claim on the property or expectation of repayment; the declaration of trust records, privately between the family and any co-owner, how that contribution should be treated if the property is later sold or the relationship ends.
Consider a couple who received a £70,000 gift from one partner's parents toward a joint purchase, protected by a declaration of trust. Years later, after a separation, the property sells for £500,000, leaving £120,000 of equity after the mortgage and costs. With the declaration of trust in place, the parents' £70,000 contribution is returned before the remaining equity is split between the former couple. Without it, the full £120,000 would likely have been treated as joint equity to divide between them, and a large part of the original parental contribution would effectively have been lost.
One important limit: a declaration of trust generally only protects a contribution in this way while the couple remains unmarried. If they later marry, a court has much wider discretion over how assets are divided on divorce regardless of what the declaration says, though it still stands as clear evidence of the parties' original intentions.
7. Alternatives to a straight cash gift
Where a full cash gift isn't feasible, some families use a guarantor mortgage or a "family springboard" style product, where the parents' own savings are held as security rather than handed over as cash, reducing the deposit the buyer needs to find directly. These structures work differently from a straight gift and carry their own lender-specific criteria, but are worth exploring where the family wants to help without transferring a lump sum outright.
8. Frequently asked questions
Does a parental loan for a house deposit affect my mortgage borrowing capacity?
Yes, significantly. Lenders treat a deposit structured as a loan as a monthly outgoing in their affordability calculation. A £20,000 loan repayable over 10 years can add roughly £170 a month in debt service, which can reduce overall borrowing capacity by approximately £25,000 to £35,000. This is why most families structure the contribution as a gift instead.
What does a gifted deposit letter need to say?
It typically needs to state the donor's name and address, their relationship to the buyer, the amount being gifted, and confirmation that no repayment is expected and the donor has no legal claim on the property. Most lenders provide a template, or the buyer's conveyancer will issue one.
Could my parents face an Inheritance Tax bill for gifting me a deposit?
Not immediately, but if the donor dies within seven years of making the gift and their estate exceeds the available nil-rate band and annual exemptions, the gift can be counted back into their estate for Inheritance Tax purposes, on a sliding taper scale depending on how many of the seven years had passed.
Can a declaration of trust protect a parental deposit gift if the couple later separates?
Yes, in most cases. A declaration of trust can ring-fence a specific contribution as belonging to one partner (or their parents) rather than being treated as joint equity, while still satisfying the lender's requirement that the money was given as an unconditional gift. It's worth noting a declaration of trust generally only protects a contribution this way while the couple remains unmarried; if they later marry, a court has much wider discretion over how assets are divided regardless.
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