Quick Summary
A guide to down payment calculations - how much to target, the tradeoffs of different percentages, and building a savings plan to get there.
The down payment is where homeownership goes from browsing Zillow to doing math. It is the number that determines whether you buy this year, next year, or five years from now - and it shapes the mortgage you live with for decades after closing.
The Down Payment Calculator runs the numbers for your situation. No signup required.
The 20% Question
The 20% down payment has taken on an almost mythological status. For a $350,000 home, that is $70,000. For many people, especially first-time buyers, $70,000 feels like an impossible wall.
Here is the thing: 20% is not a requirement. Conventional loans go as low as 3% down. FHA loans allow 3.5%. On a $350,000 home, 3% down is $10,500 - a very different savings target from $70,000.
The 20% number matters for one specific reason: private mortgage insurance (PMI). Put down less than 20%, and lenders add PMI to your monthly payment, typically 0.5-1% of the loan amount annually. On a $332,500 loan (5% down on a $350,000 home), that is roughly $140 to $275 per month on top of the mortgage.
PMI is not permanent. It drops off once you reach 20% equity through payments and/or home appreciation. But it is a real cost during the years it applies, and it is worth including in the math.
The Real Tradeoff: Buy Now or Save More
The decision between a smaller down payment now and waiting to save 20% involves competing costs, and the math is less obvious than it seems.
Buying now with 5% down on a $350,000 home at 6.5%:
Monthly mortgage payment is about $2,102. Add PMI at roughly $175 per month. Total housing cost: $2,277 (plus taxes and insurance). PMI lasts roughly 5-7 years until 20% equity is reached, costing $10,500 to $14,700 total.
Waiting 3 years to save 20%:
Three more years of rent - say $2,000 a month - totals $72,000. Then the mortgage with no PMI costs about $1,770 per month.
In this scenario, the PMI on the early purchase costs far less than the rent paid while saving. But this calculation ignores home price changes during the waiting period. If prices rise 3% per year, that $350,000 home costs $382,000 three years later - and 20% of $382,000 is $76,400, not $70,000. The target moved.
There is no universal answer here. But for people currently renting, the cost of waiting is real and quantifiable.
What People Forget: Closing Costs
The down payment gets all the attention, but it is not the only cash needed at closing. Closing costs typically run 2-5% of the purchase price - another $7,000 to $17,500 on a $350,000 home.
That turns a 20% down payment target from $70,000 into $77,000 to $87,500 in total cash needed. Many first-time buyers discover this in the final weeks before closing, which is not an ideal time for surprises.
Include closing costs in the savings target from the beginning. It is better to overshoot and have a buffer than to scramble at the finish line.
Building the Savings Plan
The down payment is one of those goals that feels abstract until it is broken into monthly numbers.
Target: $70,000 (20% of $350,000)
Saving $1,000 per month reaches the target in about 5.4 years (with 4.5% interest in a high-yield savings account). At $1,500 per month, it takes roughly 3.7 years. At $2,500 per month, about 2.2 years.
A few things that accelerate the timeline:
Automate transfers. Money that moves to a separate savings account on payday, before it can be spent, stays saved at a dramatically higher rate than money you plan to transfer “later.”
Redirect windfalls. Tax refunds, bonuses, cash gifts - directing these toward the down payment fund can shave months off the timeline. A $5,000 tax refund drops a $70,000 target by two months of $2,500 savings.
Keep it safe. Down payment money is not investment money. A high-yield savings account at 4-5% APY provides meaningful growth with zero risk of loss. The stock market might return more over 5 years, but a 20% drop right before you need the cash pushes the purchase back by years. For timelines under 3 years, preservation matters more than growth.
How Monthly Savings Looks in Practice
For many households, the down payment competes with other financial goals. Retirement contributions, debt payments, emergency fund building, and daily life all want the same dollars.
The Monthly Budget Template can help identify how much room actually exists for down payment savings after covering everything else. Sometimes the answer is smaller than hoped - and that is useful information too. Knowing it takes 6 years instead of 3 is better than assuming 3 and coming up short.
The Financial Planning Template shows how the down payment goal fits alongside other financial priorities - retirement, debt payoff, emergency fund - and helps think through the sequencing.
The Emotional Side
Down payment saving is one of the few financial goals where the number feels personal. It is not an abstract retirement target decades away. It is “this is when I can have a home.” That emotional weight makes it both motivating and stressful.
Two things help. First, having a specific target and timeline turns anxiety into a plan. “I need $70,000 and I am saving $1,500 per month, so I am roughly 3.7 years away” is more manageable than “I need to save a lot of money somehow.” Second, tracking progress monthly makes the long timeline feel shorter. Watching the savings grow from $5,000 to $15,000 to $30,000 provides evidence that the plan is working, even when the finish line is still years away.
The down payment is a large number. But it is a finite number, and finite numbers are achievable with time and consistency.
More on Housing & Mortgages
- Home Affordability Calculator: How Much House Can You Afford? - Calculate a comfortable purchase price based on income, debts, and down payment
- Rent vs. Buy Calculator: The Real Comparison - The full cost comparison between renting and buying, including opportunity cost
- Mortgage Payoff Calculator: Extra Payments Impact - How extra payments shorten your loan term and save on interest