How long to save for your first home.

The first-time buyer advantages worth knowing about

First-time buyers get genuine financial advantages that can save tens of thousands, but only if you know about them. Stamp duty relief up to 425,000 (so no property transfer tax on typical first homes), the tax-advantaged savings account's 25% bonus on contributions up to 4,000/year (worth 1,000/year free money, usable for a home purchase under 450,000 or at age 60), and several first-time-buyer-specific mortgage products with favourable rates or lower deposit requirements. The calculator above handles the purchase math; this section covers the advantages most first-time buyers under-use.

The tax-advantaged savings account calculation most people don't run

You can contribute up to 4,000/year to a tax-advantaged savings account (tax-advantaged savings account). The government adds 25% on top — 1,000 free per year. Over 5 years of maxing the tax-advantaged savings account: 20,000 contributed, 5,000 government bonus = 25,000 available for a deposit. Compare that against an ordinary savings account earning 4.5% on 4,000/year for 5 years: about 22,200 total. The tax-advantaged savings account is worth 2,800 more. If you're a first-time buyer planning to buy within 5+ years, opening a tax-advantaged savings account at 18 (or as early as possible) is close to free money — the main constraint is that the funds can only be used for a first home under 450,000 or from age 60, and withdrawals for any other purpose cost a 25% penalty (which loses you more than the bonus gained).

Stamp duty relief in actual numbers

For first-time buyers and buying a property under 425,000, no property transfer tax applies. Between 425,000 and 625,000, you pay 5% only on the portion above 425,000. Above 625,000, you lose first-time buyer relief entirely. Non-first-time buyers start paying at 250,000 (5% from there). The difference matters: a 400,000 first-time buyer purchase pays 0 property transfer tax. A subsequent buyer on the same property pays 7,500. That's genuine money. use their own systems (LBTT and LTT respectively) with different thresholds but similar first-time buyer advantages.

How much deposit is actually enough?

Technically, 5% is the minimum. Practically, 10% makes more products available at meaningfully better rates. 15–20% opens most of the market at the best rates. For a 300,000 property: 5% = 15,000, 10% = 30,000, 15% = 45,000, 20% = 60,000. The difference between 5% and 20% is 45,000 — and the lifetime interest saved on the cheaper rates that higher deposits access typically runs 20,000–40,000 on a 25–30 year mortgage. Waiting 18 extra months to reach 10% is usually worth it unless local prices are rising faster than you can save.

The income-multiplier reality check

Lenders typically offer 4–4.5× combined gross income for mortgages. A first-time buyer on 35,000 salary can borrow about 140,000–157,500 alone. A couple on 60,000 combined can borrow 240,000–270,000. With a 15% deposit that's 280,000–320,000 of property. These figures are frustrating in high-price areas where the average first-time property price exceeds what the typical first-time buyer income can access. The honest answer and the South East is often "co-buy with a partner, family help, or buy somewhere cheaper". Stretching to individual maximum capacity in those areas routinely leads to affordability stress within 12–24 months.

The shared ownership option

Shared ownership — buying a percentage of a property (typically 25–75%) and paying rent on the remaining portion — expands the affordable property pool considerably. A 400,000 property bought as 50% shared ownership: 200,000 mortgage (on the part you own) plus rent on the other half (typically 2.75% of the unowned portion annually, so around 5,500 a year or 460/month). Total monthly cost is often comparable to buying outright but with a fraction of the deposit. Downsides: harder to sell (smaller buyer pool, permission requirements), annual rent increases, and you don't capture full appreciation on the property. Useful for people who couldn't otherwise buy in their area; not necessarily the best financial choice if they could.

Joint mortgages with family

Family-linked mortgages (Barclays Springboard, Halifax Family Boost, etc.) let a family member deposit savings as security without gifting. The savings are returned after 3–5 years if the mortgage stays current. This allows first-time buyers to effectively borrow 100% of the property value without the risk profile (and rates) of a 95% LTV mortgage. It requires a family member willing to lock up savings for 3–5 years. For households with that option, it's usually better than the typical high-LTV first-time buyer mortgage.

The ongoing costs first-time buyers under-budget

Beyond the deposit and mortgage, the first year of ownership typically costs 5,000–15,000 more than first-time buyers expect. Buildings insurance (200–500). local property tax (1,500–3,000 annually). Initial furniture if moving from furnished rental (2,000–10,000). A new boiler or kitchen that didn't need replacing in rental (often 3,000–8,000 in year one or two). Maintenance and emergency repairs. The biggest first-year mistake isn't buying too expensive a house — it's buying the right house without cash reserves for the operating costs. Budget for 1% of property value in maintenance each year, front-loaded in year one.

The decision worth making once

For most first-time buyers, the central decision is: rent longer while saving, or buy now at a lower LTV. The rule of thumb is that each 5% of additional deposit is worth roughly 6–12 months of waiting (because the interest savings on the lower LTV rate typically exceed rental costs and opportunity cost). This doesn't always hold in rapidly-rising markets where prices outrun savings. In stable or falling markets, patient buyers with bigger deposits consistently do better than rushed buyers with minimum deposits. The calculator above helps run the version of that analysis that fits your situation.

What the calculator can't see

tax-advantaged savings account bonuses, first-time buyer scheme scheme eligibility (for existing participants), shared ownership options, family-assisted mortgages, or the emotional weight of buying in a particular area. Use the figure as the starting arithmetic; the actual decision weighs all of these alongside the financial number.