At 6.5% over 30 years with 20% down, principal and interest on a $300,000 home is about $1,517/mo; the full payment with taxes and insurance is around $1,879/mo.
Smaller down payments mean a larger loan and, under 20%, added PMI. Here's how a $300,000 home compares (national default assumptions, 6.5% rate):
| Down payment | Cash down | P&I only | Full payment |
|---|---|---|---|
| 5% down | $15,000 | $1,801 | $2,283 |
| 10% down | $30,000 | $1,707 | $2,182 |
| 20% down | $60,000 | $1,517 | $1,879 |
P&I is principal & interest only; the full payment adds property tax, insurance and (under 20% down) PMI.
Interest rate and down payment move the payment the most, followed by property tax (which varies a lot by state). Your own quote depends on credit, loan type, and local tax and insurance rates — open the calculator to plug in real figures.
The full mortgage calculator already handles down payment, PMI, property tax, insurance, HOA, total interest, and an affordability comfort rating — and every scenario is shareable by link.
Using a 28% housing-cost-to-income guideline with 20% down, roughly $80,529 per year — a planning estimate, not a pre-qualification.