How Much Do You Need to Save Each Month for Your Home?
The honest monthly number — accounting for HYSA interest, the moving target of home-price appreciation, and the closing costs most calculators ignore. Powered by live CPI data.
Most down payment calculators target today's price and ignore interest. This one targets the price at purchase and lets your HYSA do part of the work.
20%
Down payment that avoids PMI — saving $50–$200/month on your mortgage
~$9,989
Extra down payment the default scenario needs because the home appreciates while you save
~3%
Closing costs on the purchase price — the cash most buyers forget to budget for
How to save a down payment faster
Understanding PMI
Private Mortgage Insurance is required on most conventional loans with less than 20% down. It typically costs 0.5–1.5% of the loan per year — about $100–$300/month on a $300K loan. Once you hit 20% equity, you can request PMI removal.
The right savings vehicle
For a down payment 2–5+ years away, a High-Yield Savings Account earning 4–5% APY is usually the right choice. For 5+ years out, some buyers use conservative bond funds. Never put short-term down payment savings in stocks.
Chasing a moving target
Home prices rarely stand still. If they appreciate 4%/year while you save, the down payment you need grows too — so this calculator sizes your goal off the projected price at purchase, not today's. That's why your monthly number is higher (and more honest) than a simple price × percentage.
How the Down Payment Calculator Works
Formula
Target = (price × (1 + appreciation)^years) × down% ; Monthly = (Target − savings·(1+r)^n) ÷ (((1+r)^n − 1) ÷ r), r = HYSA APY ÷ 12Project the price
Grow today's home price by your expected appreciation rate over the months until you buy.
Size the down payment
Apply your down payment % to the projected purchase price — the real, moving target.
Credit your interest
Grow current savings and each monthly deposit at the HYSA APY, then solve for the monthly amount that reaches the target.
Add cash to close
Layer on ~3% closing costs so you see the full cash needed at the table, not just the down payment.
A naive down payment calculator multiplies today's price by your down payment percentage, subtracts what you've saved, and divides by months. That misses three things that materially change the answer: your savings earn interest, the home keeps appreciating, and closing costs are real cash you need on top of the down payment.
Using the defaults — a $400,000 home, 20% down, $5,000 saved, 36 months, and 4% appreciation — the home is projected to reach about $449,946, making the down payment $89,989 rather than $80,000. A 4.4% HYSA earns roughly $6,005 along the way, so you need about $2,194/month instead of $2,361 in a 0% account. Add ~$13,498 in closing costs and your true cash to close is about $103,487 — the number that actually matters when you make your offer.