How to Save for a House Down Payment — A Plain English Plan

The U.S. median existing-home sale price was about $420,000 in early 2026, according to the National Association of Realtors. A traditional 20% down payment on that median home is $84,000. For a household saving 10% of the median U.S. net income, that's roughly 9 years of saving from $0 — and that's before accounting for closing costs, moving costs, and the emergency fund that needs to remain intact after closing.

Saving for a house down payment is one of the largest single savings goals most households ever set. The math is intimidating only because most people never break it down. The actual approach is straightforward, the timeline is calculable, and the trade-offs between buying sooner with a smaller down payment vs waiting for 20% are knowable in advance.

Picking the right down payment percentage

The traditional 20% benchmark exists because that's the threshold above which conventional mortgage lenders waive private mortgage insurance (PMI). Below 20%, conventional loans require PMI, which adds 0.3–1.5% of the loan amount per year to the monthly payment.

But 20% isn't the only option. Several U.S. mortgage programs accept much smaller down payments:

Conventional loan with PMI — Some programs accept down payments as low as 3% of the purchase price. PMI applies until the loan-to-value ratio drops below 80% (either through paying down principal or rising home equity).

FHA loan — Federal Housing Administration loans accept down payments as low as 3.5% with credit scores of 580+. FHA loans require both upfront and ongoing mortgage insurance premiums (MIP), which behave similarly to PMI but don't drop off based on equity (for most current FHA loan structures).

VA loan — Available to eligible U.S. veterans and active-duty service members. No down payment required, no PMI. Funding fee applies (typically 1.4–3.6% of the loan amount, often financeable into the loan).

USDA loan — For homes in eligible rural areas. No down payment required. Income limits and property location restrictions apply.

First-time homebuyer programs — Many state and local programs offer down payment assistance, grants, or low-rate second loans for first-time buyers. The Consumer Financial Protection Bureau's homebuyer toolkit and your state housing finance agency's website are the standard places to look.

The "right" down payment depends on three factors: how soon you want to buy, how comfortable you are paying PMI, and how the math works on the specific properties in your local market.

The real cost of buying with a smaller down payment

Buying with 5% down instead of 20% lets you buy 3+ years sooner in most markets. The trade-off is PMI plus higher interest costs over the life of the loan because the loan balance is larger.

A worked example: a $400,000 home, 30-year fixed mortgage at 6.5% interest.

With 20% down ($80,000): loan amount $320,000. Monthly principal + interest about $2,022. No PMI. Total interest paid over 30 years: about $407,800.

With 5% down ($20,000): loan amount $380,000. Monthly principal + interest about $2,401. PMI roughly $190/month (depends on lender and credit). Combined monthly: about $2,591. PMI typically drops off after 8–11 years as equity grows. Total interest paid over 30 years: about $484,600. PMI total over the years it applies: roughly $20,000.

The 5% buyer pays about $77,000 more in interest plus ~$20,000 in PMI — about $97,000 more in total housing costs over 30 years. They also bought 3+ years sooner, avoided 3+ years of rent (potentially $50,000+ depending on local rent), and started building equity 3+ years earlier.

The math isn't obvious in either direction. For households in expensive markets where rent is rising fast, buying sooner with 5% down often comes out ahead. For households in stable rent markets with strong saving capacity, waiting for 20% often comes out ahead. Run the numbers on your specific market before deciding.

Where to keep down payment savings

The right account for down payment savings depends entirely on your timeline.

Within 1 year: A high-yield savings account (HYSA) at an online bank. As of 2026, leading HYSA rates are roughly 4%, vs 0.01–0.5% at traditional banks. The interest is meaningful, the money is fully accessible, and you won't lose principal.

1–3 years out: Same answer. HYSA. Some households add a CD ladder for slightly higher yield (lock smaller portions of the savings into 6-month or 12-month CDs), but the simplicity of an HYSA is hard to beat.

3–5 years out: HYSA still works. Some households add Series I Savings Bonds (I-bonds) for inflation protection, capped at $10,000 per person per year via TreasuryDirect.gov. I-bonds can't be redeemed in the first 12 months and incur a 3-month interest penalty if redeemed before 5 years.

5+ years out: Most personal finance educators still recommend cash-equivalent accounts (HYSA, CDs, Treasury bills, I-bonds). Some households with longer horizons mix in conservative bond funds or balanced index funds, accepting some volatility for higher expected returns. Stocks or stock-heavy funds aren't appropriate for down payment savings even at 5+ year horizons because a 30% market drop right before you're ready to buy resets the timeline.

What doesn't work for down payment savings: leaving the money in checking (no interest, treated as available), CDs longer than your timeline (early withdrawal penalties), or anything that ties up access. The emergency fund job is "absorb shocks." The down payment fund job is "preserve and grow modestly until ready to deploy."

A simple worked example: building toward $40,000 in 3 years

Consider a household earning $5,500 net per month, currently with $0 in down payment savings, targeting a $40,000 down payment in 3 years (10% on a $400,000 purchase price).

Math: $40,000 ÷ 36 months = $1,111/month in pure savings, ignoring interest.

That's about 20% of net income — a meaningful share. Most households at this income level can't sustain that rate while also funding an emergency fund and contributing to retirement.

The realistic alternatives:

Stretch the timeline. $1,111/mo for 36 months becomes $667/mo for 60 months ($40,000 ÷ 60). At 12% of net income, this is a sustainable rate alongside other priorities. Trade-off: 2 more years before buying.

Reduce the target. A 5% down payment on the same house is $20,000, reachable in 18 months at $1,111/mo or 30 months at $667/mo. PMI applies for ~8–11 years.

Find income. A side income source of $400/month combined with $700/mo savings hits the $40,000 in 36 months. Side income is harder to set up than a savings transfer but expands the math significantly when it works.

Combine with assistance. Many states offer first-time-homebuyer assistance worth 3–5% of the purchase price, reducing the cash needed by $12,000–$20,000 on a $400,000 home. Eligibility varies but most programs target first-time buyers under specific income thresholds.

Most households use some combination. The right plan depends on the specific local market, household income trajectory, and how patient the household is willing to be.

The other costs to budget for (beyond the down payment)

Closing costs are the most commonly forgotten line item. Most U.S. closings cost 2–5% of the purchase price in lender fees, title insurance, appraisal fees, attorney fees, and various other charges. On a $400,000 home, that's $8,000–$20,000.

Moving costs add another $1,000–$5,000 depending on distance and how much help you hire.

Immediate post-move expenses — minor repairs, paint, basic furniture for any new rooms, appliances if not included — typically run $2,000–$10,000 in the first six months.

Maintenance reserve — most experts suggest budgeting 1% of the home's value per year for maintenance (roof, HVAC, plumbing, appliances). On a $400,000 home, that's $4,000/year going forward.

The emergency fund needs to remain intact after closing. Lenders look at "reserves" separately from the down payment when underwriting the loan, and you absolutely don't want to close on a house and then have no buffer for the first unexpected repair.

So the realistic total cash needed at closing on the $400,000 home with a 10% down payment isn't $40,000 — it's $40,000 + $12,000 (closing costs) + $3,000 (moving) + $5,000 (immediate post-move) + maintaining the existing emergency fund = approximately $60,000 to $65,000 in liquid cash before signing.

Common mistakes when saving for a house

Three patterns repeat across down payment saving attempts.

The first is forgetting the closing costs and other transaction fees. The household saves diligently to hit a $40,000 down payment, then discovers they need another $20,000 for everything else and has to delay closing by another year. Build the closing cost line in from the start.

The second is treating the down payment savings as a substitute for an emergency fund. After closing, the household has neither — and the first major appliance failure goes on a credit card. Keep the emergency fund separate and intact through the entire savings period and after closing.

The third is putting down payment savings in stocks or volatile assets to "grow it faster." A 30% market drop right when you're ready to buy can delay closing by years. Down payment money's job is preservation, not growth. Use a high-yield savings account, CDs, or I-bonds.

What experts say

The Consumer Financial Protection Bureau's homebuyer toolkit is the most comprehensive free resource for first-time homebuyers in the U.S. It includes worksheets for calculating affordability, comparing loan offers, and budgeting for closing costs.

The National Association of Realtors publishes monthly home price data and is the authoritative source for U.S. home price trends and median sale prices by market.

The U.S. Department of Housing and Urban Development's first-time homebuyer page lists state and local down payment assistance programs.

For the savings mechanics that build toward any large goal — including a down payment — see our companion piece on how to save money every month. For the emergency fund that needs to remain separate from down payment savings, see how to build an emergency fund. To work out the exact monthly contribution your specific down payment number and target date imply, run them through our savings goal calculator.

Frequently asked questions

How much down payment do I need to buy a house? The traditional benchmark is 20% of the purchase price, which avoids private mortgage insurance (PMI) on conventional loans. But many U.S. mortgage programs allow much smaller down payments — FHA loans accept 3.5%, conventional loans can go as low as 3% with PMI, and VA loans (for eligible veterans) require no down payment. The "right" amount depends on the loan type, your local market, and how comfortable you are paying PMI in exchange for buying sooner.

How long does it take to save a down payment? For a 20% down payment on the U.S. median home price (~$420,000 in 2026), households saving 10% of net income at the median household income take roughly 8–12 years. For a 5% down payment, the timeline shrinks to 2–3 years. The exact number depends heavily on local home prices and your savings rate.

Where should down payment savings go? A high-yield savings account at an online bank for funds you'll need within 1–3 years, or a mix of cash and short-term Treasury bills/I-bonds for 3–5 year horizons. Don't put down payment savings into stocks or volatile investments — a market downturn right when you're ready to buy could push the timeline back by years. The job of down payment savings is preservation, not growth.

Should I use my emergency fund for the down payment? No. The emergency fund and down payment savings are two distinct categories. Combining them creates the situation where, after closing, you have no emergency fund left and no equity to extract for the next emergency. Most lenders also expect to see emergency reserves separate from the down payment when underwriting the loan.

In summary

Saving for a house down payment is a long-term goal that breaks into three decisions: what percentage to aim for (3% to 20%, with PMI implications below 20%), where to keep the savings (high-yield savings account or short-term cash equivalents, never stocks), and how long to wait (smaller down payment + earlier purchase vs larger down payment + later purchase). The trade-offs are knowable; run the math on your local market before committing to a target.

The single most useful action this week: pull the current median home price for the specific neighbourhood you'd want to buy in, multiply by 5%, 10%, and 20%, and compare each target against what your household could realistically save monthly without breaking other priorities. The answer to "how much should I save" becomes obvious once those three numbers are sitting in front of you.

Sources

• Consumer Financial Protection Bureau, Buying a House — consumerfinance.gov/owning-a-home
• National Association of Realtors, Research and Statistics — nar.realtor/research-and-statistics
• U.S. Department of Housing and Urban Development, Buying a Home — hud.gov/topics/buying_a_home
• Investopedia, Down Payment — investopedia.com/terms/d/down_payment.asp