Saving for a down payment starts with the real number: the down payment itself, plus closing costs of roughly 2% to 5% of the price, plus a small reserve for moving and first-year surprises. On a $300,000 home, a 20% down payment is $60,000, closing adds $6,000 to $15,000, and a comfortable target lands near $72,000. Down payments run from 3% on some conventional first-time loans to 20% or more — and the size you choose sets whether you pay private mortgage insurance, which typically runs 0.5% to 1.5% of the loan per year until equity reaches 20%.
SAMCASH publishes information, not financial advice — the right target depends on your market, loan options, and timeline.
How much do you actually need?
Less than the folklore says, and more than the minimum suggests. First-time buyer programs allow 3% to 5% down — $9,000 to $15,000 on our example — and state housing agencies often layer grants or favorable rates on top. But a small down payment means a bigger loan, PMI, and a smaller equity cushion on day one. A middle path many savers take: 10% down ($30,000), accepting modest PMI for a few years rather than waiting to fully clear the 20% bar while prices and rents move on without them.
| Down payment on $300,000 | Cash needed with closing (≈4%) | Trade-off |
|---|---|---|
| 3% — $9,000 | ≈ $21,000 | Biggest loan, PMI, thinnest cushion |
| 10% — $30,000 | ≈ $42,000 | Moderate PMI, balanced payment |
| 20% — $60,000 | ≈ $72,000 | No PMI, best rate positioning |
Closing ranges and PMI bands are typical industry figures — your loan estimate will carry the exact numbers.
Where should the money sit while it grows?
In insured, liquid-ish accounts matched to the timeline — never stocks. A down payment needed within three years can suffer a market drawdown it has no time to recover, which converts a home plan into a waiting game. Under two years: a high-yield savings account, where top online banks paid around 4% APY into 2026. Two to five years: Treasury bills, exempt from state tax, or a CD ladder with maturities stepping toward your target date. The premium for stretching further out is modest; the protection is the point.
What does the monthly math look like?
Work it with stated assumptions. Saving $72,000 in four years requires about $1,150 a month at an assumed 4% APY — the contributions total $55,200 and compounding supplies most of the rest, since 1,150 × [(1.00333⁴⁸ − 1) ÷ 0.00333] ≈ 59,800 — so call the target $1,375 a month at 0% to stay conservative, or extend to five years at $1,100. On a shorter runway the number simply rises: two years to $42,000 (10% plus closing) is about $1,700 a month. Automate the transfer for the day after payday; a house fund that depends on month-end leftovers stays a wish.
How do you hit an aggressive number?
- Give every windfall the same prewritten job — tax refunds, bonuses, gifts route a fixed share (commonly half to all) into the house fund.
- Run a dedicated sub-account with its own nickname — labeled buckets get funded; generic savings leak.
- Pause competing goals honestly: retirement contributions below the employer match are the one place not to raid — the match is a 50–100% return no house appreciates.
- Attack the timeline from both ends: every $100 of monthly spending cut is $100 of down payment, and every month added to the runway cuts the required amount.
What mistakes cost the most?
Three stand out. Investing the fund in stocks and discovering that a 20% market drawdown means a two-year delay. Draining retirement accounts — early-withdrawal penalties and lost compounding make the 401(k) loan or IRA raid the most expensive down payment dollars available. And shopping for houses before the fund exists: falling in love with a listing converts a savings plan into a rushed, thinly financed purchase, which is how buyers end up house-rich, cash-poor, and PMI-laden.
FAQ
Is it worth waiting for 20% to avoid PMI?
Sometimes, but not always — PMI of roughly $150 to $250 a month on our example is the price of buying years earlier; home-price appreciation and rent paid while waiting often exceed it. Run both timelines in current dollars for your market, and drop PMI automatically at 20% equity, or earlier by reappraisal.
Can I use gift money for a down payment?
Yes on most loan types, with documentation — a gift letter stating no repayment is expected, plus a paper trail of the transfer. Lenders scrutinize large recent deposits, so season gift funds early and keep records from day one.
Should I save for a house or pay off debt first?
High-rate card debt first, always — lenders price it against you, and 20%-plus interest outruns any savings plan. Low-rate student or auto loans can coexist with house saving if the debt-to-income math clears the lender's line.
For more context, read How to build an emergency fund on a tight budget.
For more context, read treasury bills for beginners.
For more context, read Savings account vs. money market account: how they differ.
