What Down Payment Means in Plain English

When you buy a home, you can’t usually borrow the entire purchase price — lenders require you to put in some of your own money first. That upfront chunk is your down payment. On a $400,000 home with a 10% down payment, you bring $40,000 to the table and borrow the remaining $360,000.

The size of your down payment matters for two reasons: it determines your loan balance (and therefore your monthly payment), and it affects whether you’ll be required to pay Private Mortgage Insurance. The 20% threshold is significant — cross it and you avoid PMI entirely.

Down payments aren’t one-size-fits-all. Different loan programs allow different minimums, and what makes sense for your situation depends on how much you’ve saved, how long you’re willing to wait, and what’s happening in the housing market where you’re buying.

How Down Payment Works

The percentage options in practice: FHA loans allow as little as 3.5% down (with a credit score of 580+), Fannie Mae’s HomeReady program allows 3% down for qualifying buyers, VA loans offer 0% down for eligible veterans and active-duty military, and conventional loans typically start at 3-5% down with private mortgage insurance.

Most buyers land somewhere in the 5-20% range. On a $400,000 home, that works out to $20,000 at 5% or $80,000 at 20%. The gap in monthly payment between those two scenarios is material: the 5%-down buyer has a higher loan balance ($380,000 vs $320,000) AND pays PMI on top of that, which can add $150-300/month to the payment.

Once your loan balance falls below 80% of the home’s value — either through principal payments or appreciation — PMI can be removed, which is when the calculus between a smaller and larger down payment starts to even out.

Why Down Payment Matters to You

A larger down payment buys you a lower monthly payment, lower lifetime interest, and the avoidance of PMI. It also signals financial strength to the lender, which can sometimes help you secure a better rate. But there’s a real tradeoff: every dollar going into the down payment is a dollar leaving your liquid savings.

The less obvious consideration is opportunity cost and timing. If you’re saving toward 20% but home prices in your area are appreciating 5-6% per year, the goalposts keep moving. In that case, buying sooner with a smaller down payment — even with PMI — may be the more financially sound move, because you’re building equity in an appreciating asset rather than sitting on the sidelines while the market runs.

Quick Example

Alex is buying a $400,000 home. With 5% down ($20,000), Alex borrows $380,000 at 7% and pays roughly $2,530/month in principal and interest, plus approximately $250/month in PMI — total around $2,780.

With 20% down ($80,000), Alex borrows $320,000 at 7% and pays roughly $2,130/month in principal and interest, no PMI — total around $2,130. That’s $650/month less, but it cost an extra $60,000 upfront to get there.

Common Misconceptions

  • You need 20% down to buy a home. Not true — multiple loan programs allow 3-3.5% down, and VA loans allow zero down. The 20% threshold eliminates PMI, but it’s not a requirement.
  • PMI is money down the drain and should always be avoided. PMI is a cost, but it’s not automatically a bad deal. If it lets you buy sooner into a rising market, the equity gains can dwarf what you paid in PMI.
  • A bigger down payment is always better. Not if it drains your emergency fund or leaves you cash-strapped after closing. Having reserves after you buy matters too.