Monthly Payment on a $500,000 House with 20% Down
A $500,000 home with 20% down is a common move-up-buyer scenario — a meaningfully larger loan than a starter home, still structured to avoid mortgage insurance entirely.
- 20% down on $500,000 is a $100,000 down payment, leaving a $400,000 loan.
- Total monthly payment lands around $3,045/mo at a 6.5% rate — with zero PMI.
- Comfortably affording this payment implies household income around $130,500/year.
The real payment breakdown
Includes estimated tax and insurance ($4,800/year tax, $1,400/year insurance). Use the calculator below, pre-filled with these numbers, to swap in your real figures.
What income actually supports this payment
Using the 28% front-end rule, a $3,045/mo payment implies household income around $130,500/year — before other debts are factored in under the full 36% back-end DTI rule.
What a rate change does to this specific loan
The 15-year alternative, run on these exact numbers
A 15-year term on this $400,000 loan raises principal and interest to about $3,484/mo, but cuts total lifetime interest from $510,178 to $227,197 — a savings of $282,981, the largest absolute savings of any scenario in this series so far.
Try it with your own rate and numbers
The calculator below is pre-filled with this exact scenario.
Move-up buying means two transactions, not one
A $500,000 purchase with $100,000 down usually describes a move-up buyer, and the defining feature of move-up buying is that you're on both sides of the market simultaneously. Whatever you gain selling into a strong market, you give back buying into it.
This makes market timing largely irrelevant and sequencing enormously relevant. Selling first means you have certainty about your proceeds but may need temporary housing. Buying first means no moving twice but requires carrying two payments, or a bridge loan, or a contingent offer that sellers in a competitive market will discount.
The financial risk in a move-up is rarely the price. It's the overlap — the weeks or months where you own two properties or none, and the cost of solving that problem badly.
Rolling equity forward has a hidden cost
Applying proceeds from a prior home toward the new down payment feels like using money you already have. It is, but the transaction consumes a meaningful slice of it on the way through.
Selling costs — commission plus transfer and closing items — commonly run 6–9% of the sale price. Buying costs add another 2–5% on the purchase side. A move-up transaction can absorb well over $50,000 in friction on a pair of transactions this size, before anyone moves a box.
That's the number that makes frequent moving expensive, and it's the number most often left out when people compare staying versus upgrading. Renovating the current home is sometimes the better financial answer purely because it avoids paying transaction costs twice.
The 15-year question is real at this loan size
On a $400,000 loan the lifetime interest difference between 15-year and 30-year terms is large enough to change retirement plans, which makes it worth genuinely evaluating rather than dismissing on payment size.
The argument against the 15-year term isn't that it costs more monthly — it's that the higher required payment removes flexibility permanently. A 30-year loan paid on a 15-year schedule achieves most of the interest savings while preserving the ability to drop back to the lower required payment if income changes.
The counterargument is behavioral: almost nobody actually does it. The 15-year term enforces the discipline that the 30-year term merely permits. Which is right for you depends on an honest read of whether you'd follow through, not on the arithmetic — the arithmetic favors the 30-year-paid-early approach if you execute it.
How we verify this: figures on this page are computed from standard published formulas and checked against our own calculators. Assumptions are stated inline. Found an error? Let us know — see our editorial approach.