Ask someone how much they need to buy a house and they'll usually quote the deposit. It's the headline figure, the one lenders talk about, and the one most savings plans are built around — and it's also only part of what actually needs to be sitting in the bank account on completion day.
Stamp duty is the big one most people underestimate
Stamp Duty Land Tax (SDLT) is charged on most property purchases in England and Northern Ireland, in bands based on the price — the more expensive the property, the higher the rate on the portion above each threshold. First-time buyers get relief on part of the cost, but only below a set price ceiling; above it, the relief disappears entirely and standard rates apply. Scotland and Wales run their own separate systems (LBTT and LTT) with different bands again. Whichever nation it's in, this is usually the single biggest cost after the deposit itself — and it has to be paid in cash, not added to the mortgage.
The fees that show up whether you like it or not
A solicitor or licensed conveyancer handles the legal side of the purchase, and their fee is due regardless of how smoothly things go. A survey — even a basic one — is worth having before committing to a price, and a full structural survey costs more but can save far more if it finds a problem. Add a mortgage arrangement fee (some lenders let this be added to the loan, most don't waive it), land registry fees, and local searches, and the "extra" costs on top of the deposit start looking like a second, smaller deposit in their own right.
Moving day isn't free either
Removals, a deep clean of the old place, updating addresses, and the general cost of actually relocating a household rarely get a line in the budget — but they're real, they're due around the same time as everything else, and they tend to be paid for out of whatever cash is left after the bigger costs are covered.
Why this catches first-time buyers out specifically
Someone who has bought before has usually felt this cost once already and remembers to plan for it. A first-time buyer is often working from a single number — "I need a 10% deposit" — without realising that number is the floor, not the ceiling, of what's needed. Working out the full figure before making an offer avoids the scramble to find another few thousand pounds in the final weeks before completion.
Building in a buffer
Because a few of these costs (particularly stamp duty on the exact final price, and any survey findings that lead to renegotiation or extra work) aren't fully fixed until late in the process, it's worth treating the calculated total as a minimum rather than an exact figure — a small buffer on top avoids the total needing to be found at short notice.
This article is general information, not personal financial or legal advice. Stamp duty rates, thresholds and fees vary by nation within the UK and change over time — always confirm the exact figures with your solicitor or conveyancer before exchanging contracts.
