Bottom line: The 20% down payment rule is outdated for most buyers. 3–10% down is common and financially defensible — especially when it means buying sooner, preserving cash reserves, and not depleting savings. The tradeoff is PMI (0.5–1.5%/year), which cancels once you reach 20% equity. Wait to save 20% only if you can do it within 12–18 months without sacrificing retirement savings or emergency fund.
The conventional wisdom says "put 20% down to avoid PMI." That advice made more sense when homes were cheaper and saving 20% took 2–3 years. Today, 20% on a median U.S. home ($420,000) is $84,000 — a figure that takes many buyers a decade or more to accumulate while paying rent.
Down Payment Options and Their Costs
| Down payment | On $400,000 home | Loan amount | Monthly PMI (est.) | Time to cancel PMI |
|---|---|---|---|---|
| 3% (conventional) | $12,000 | $388,000 | ~$145/mo | ~8–9 years at min payment |
| 3.5% (FHA) | $14,000 | $386,000 | ~$177/mo (MIP) | Never (life of loan) |
| 5% | $20,000 | $380,000 | ~$142/mo | ~7–8 years at min payment |
| 10% | $40,000 | $360,000 | ~$112/mo | ~5–6 years at min payment |
| 20% | $80,000 | $320,000 | None | N/A |
The difference between 5% and 20% down is $60,000 in cash deployed — and about $142/month in PMI that cancels after 5–8 years. Over 7 years, that PMI costs approximately $11,900. The $60,000 not deployed, invested at 7% average annual return over the same 7 years, grows to approximately $96,000.
Putting 20% down costs you more in opportunity cost than it saves in PMI — for most buyers.
The Case for a Larger Down Payment
Lower monthly payment. Every extra dollar down reduces principal and therefore the monthly payment. 20% vs 5% down on a $400,000 home reduces the monthly P&I by approximately $240/month.
Better rate. Lenders offer marginally better rates to borrowers with higher down payments (lower LTV = lower risk). The improvement is typically 0.125–0.25% between 5% and 20% down.
Immediate equity cushion. A 20% down payment means a 20% value decline would leave you exactly at break-even — not underwater. This matters if you need to sell shortly after buying.
Simpler qualification. Higher down payments reduce DTI and compensate for credit imperfections.
The Case for a Smaller Down Payment
Preserve cash. Depleting savings to 20% down leaves no buffer for moving costs, immediate repairs, new furniture, or a financial emergency. Most financial advisors recommend maintaining 3–6 months of expenses in liquid savings after closing — impossible if you pour everything into the down payment.
Buy sooner. Every year of saving is a year of rent paid (building no equity) while home prices potentially rise. If the market appreciates 4%/year, a $400,000 home becomes $416,000 the following year — your $16,000 in appreciation you would have captured exceeds a year of PMI payments.
Invest the difference. $60,000 not deployed as down payment, invested in diversified index funds, has historically returned more over time than the interest saved on the smaller mortgage.
- PMI is not forever — and it is not as expensive as its reputation suggests. At 0.5–1% annually on a $380,000 loan, PMI costs $158–317/month. It cancels once you reach 20% equity through payments and/or home appreciation. You can also accelerate cancellation by making extra principal payments or requesting a new appraisal if values have risen significantly.
- A 10% down payment is often the sweet spot: PMI is lower (because LTV is lower), you retain meaningful cash reserves, and you avoid the 'depleted savings' risk. Monthly PMI on a 10%-down conventional loan runs $80–150/month — equivalent to the cost of a streaming subscription and a tank of gas.
- Down payment assistance programs exist in every state and many cities — grants, forgivable second mortgages, and low-interest second loans that cover part or all of the down payment. These are not just for very low incomes; many programs serve moderate-income households in high-cost areas. Check HUD's state resource page and your state housing finance agency.
What You Need Beyond the Down Payment
Budget for closing costs (2–5% of the loan amount — typically $8,000–20,000) separately from your down payment. Closing costs cannot be added to the down payment; they require additional cash at closing unless you negotiate a seller credit or choose a no-closing-cost loan.
A sensible pre-purchase cash position:
- Down payment (3–20%)
- Closing costs (2–5%)
- Emergency fund: 3–6 months of expenses
- Moving costs and immediate repairs: $2,000–10,000 buffer
If hitting all four requires saving for 4+ more years, consider a lower down payment that allows you to buy sooner while preserving reserves.
Down payment requirements, PMI rates, and assistance programs vary by lender, loan type, and location.
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