How Long Does It Take to Save a House Deposit?

The deposit is the wall most first-time buyers hit. The good news is the timeline is simple arithmetic once you know two numbers: how much you need, and how much you can save each month. Here's how to work it out, what's realistic, and how to shorten the wait.

Step 1: how much deposit do you actually need?

"20%" gets quoted as the standard, but the real figure varies a lot:

• 20% of the price typically avoids mortgage insurance (PMI in the US, and a lower rate / better products elsewhere) and gets you the best mortgage rates.
• 5–10% is enough for many first-time-buyer mortgages, but you'll usually pay mortgage insurance and a higher rate.
• Plus closing costs. Don't forget legal fees, stamp duty / land transfer tax, surveys, and moving — these can add several percent on top of the deposit itself. The down payment calculator above totals the real cash needed.

So the first job is to fix a realistic target. On a $300,000 home, a 10% deposit is $30,000 — but with costs the cash needed might be closer to $40,000.

Step 2: the timeline maths

At its simplest, months to save = target ÷ monthly saving. Interest on your savings shaves a little off, but for a few-year horizon it's a small effect — the monthly amount dominates.

For a $40,000 target (deposit + costs), saving into a high-yield account at ~4%:

Scale it to your own target: a $20,000 deposit takes half as long; an $80,000 deposit takes twice. The relationship is linear, which makes it easy to plan around — and to see exactly what raising your monthly saving buys you.

Where to keep a house deposit

A deposit you'll need within a few years is short-term money, so it belongs in cash, not the stock market — a market dip right before you buy could blow up your plans. Use a high-yield savings account, a CD/GIC/term deposit timed to your purchase, or a dedicated first-home savings scheme where one exists (a Lifetime ISA in the UK, an FHSA in Canada, the First Home Super Saver scheme in Australia). These often add a government bonus or tax break that meaningfully speeds things up. For the reasoning, see saving vs investing.

How to get to the keys faster

• Use a first-home scheme. A LISA bonus, FHSA deduction, or FHSSS can add thousands you didn't have to earn — check what your country offers.
• Automate the saving the day after payday so it's gone before you can spend it.
• Lower the target. A smaller deposit (with mortgage insurance) gets you in sooner; weigh the insurance cost against years of rising prices and rent.
• Cut the biggest line. Rent is usually the largest obstacle to saving for a deposit — a temporary move (a cheaper place, a houseshare, family) can dramatically accelerate the timeline.
• Direct windfalls in full — bonuses, tax refunds, gifts — straight to the deposit fund.

Common mistakes

• Forgetting the closing costs. Saving exactly the deposit and nothing for fees leaves you short at the worst moment.
• Investing the deposit in stocks. Chasing a bit more growth on money you need in two years is a gamble you can't afford to lose.
• Ignoring first-home schemes. They're free money or tax breaks that many buyers leave on the table.

Once you've got the number and the timeline, see exactly what cash you'll need at completion with the down payment calculator, and read the first-time buyer guide for the full path from saving to keys.