Everyone talks about saving for a deposit as though it were one fixed number sitting at the end of a spreadsheet. Save the number, buy the flat, done. It is never that tidy, and the vagueness is part of why the whole thing feels so out of reach.
Work out how much deposit you actually need and the picture sharpens considerably. Most lenders will consider somewhere between 5% and 10% as a minimum, but the percentage you land on changes everything that follows. On a £250,000 flat, 5% is £12,500 and 10% is £25,000. That second figure is a great deal more saving, and it usually buys a noticeably better interest rate, which over twenty five years is not a small difference.
Bigger deposit, cheaper money
This is the trade-off at the centre of it, and it is worth sitting with for a moment rather than skimming past.
Lenders price risk in bands. Cross from a 90% loan to a 85% one, or from 85% to 80%, and you often move into a better rate bracket. The monthly saving can be meaningful, and it compounds across the whole term.
The counterweight is time. Saving another £12,000 might take you two more years, during which rents are paid to somebody else and prices may well have moved. There is no universally correct answer here, only your answer, and anyone who tells you otherwise is selling something.
The costs that are not the deposit
Here is where budgets tend to come apart. The deposit is the headline. It is not the total.
- Stamp duty. First time buyers get relief up to a threshold, but the thresholds have changed more than once in recent years, so check the current rates rather than what a friend paid in 2023.
- Conveyancing. Typically several hundred to well over a thousand pounds once searches and Land Registry fees are included.
- A survey. Optional in the strict sense. Skipping it on an older property is a gamble with numbers considerably larger than the survey fee.
- Mortgage and broker fees. Arrangement fees can run into four figures. Sometimes they can be added to the loan, which quietly means paying interest on them for decades.
- Moving and the first month. The van, the locks, a bed that fits, the curtains you did not realise cost that much. It adds up fast.
- A buffer. The boiler will fail. It always does, usually in the first winter. Completing with nothing left in the account is how a manageable purchase becomes a stressful one.
A sensible rule is to treat these extras as a separate pot rather than shaving them off the deposit, because the deposit is the bit the lender is watching.
The Lifetime ISA, with the small print
If you are between 18 and 39 and buying your first home, this is the closest thing to free money on offer. You can pay in up to £4,000 a tax year and the government adds 25%, which is up to £1,000 annually on top of whatever interest you earn.
The conditions matter though. The property has to be worth £450,000 or less, which in parts of the country is a genuine constraint. The account needs to have been open at least twelve months before you can use it. And if you withdraw for anything other than a first home or retirement, there is a penalty that can leave you with less than you put in. Worth opening early, even with a small amount, purely to start the twelve month clock.
Where people go wrong
Two things, mostly.
The first is treating the deposit as the only variable. Lenders look at income, outgoings, existing debt and how you actually spend. Clearing a credit card can improve what you can borrow more than another two thousand pounds saved.
The second is waiting for certainty that never arrives. There is always a reason to hold off another six months. Rates might fall, prices might soften, you might get a pay rise. Sometimes waiting is genuinely the right call. Sometimes it is just fear wearing sensible clothes, and the honest test is whether you are waiting for a specific thing you have written down, or simply waiting.
None of this is financial advice, and a decent independent broker will earn their fee several times over by telling you which lenders would actually look at your situation. But going into that conversation knowing your own numbers changes the tone of it entirely. You stop being someone hoping to be told good news and start being someone with a plan.
About the author
Paul Gibbens – Property Expert at Housebuyers4u
He is a property expert at Housebuyers4u, advising UK homeowners on quick house sales, realistic valuations and how to avoid common pitfalls such as unclear fees, hidden option agreements and last-minute price changes.
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