50-Year Mortgage on $600,000 Home
Last updated June 2026
On a $600,000 home with 20% down ($120,000), a 50-year mortgage at 6.875% gives you a monthly payment of $2,842 compared to $3,153 on a 30-year term — saving $311/month but costing $570,186 more in total interest.
Property Details
Term Comparison
| Term | Monthly Payment | Total Interest | Total Cost | vs 30yr |
|---|---|---|---|---|
| 15 yr | $4,281 | $290,562 | $770,562 | $-365K interest |
| 20 yr | $3,686 | $404,521 | $884,521 | $-251K interest |
| 25 yr | $3,354 | $526,308 | $1,006,308 | $-129K interest |
| 30 yr (baseline) | $3,153 | $655,173 | $1,135,173 | baseline |
| 40 yr | $2,939 | $930,907 | $1,410,907 | +$276K interest |
| 50 yr | $2,842 | $1,225,359 | $1,705,359 | +$570K interest |
50-Year Monthly Payment
$2,842
vs 30yr: saves $311/month
The Cost of Time
Interest Share of Total Cost
What This Means
For a $600,000 home with 20% down, you borrow $480,000. At 6.875%, a 50-year mortgage drops your monthly principal and interest payment to $2,842, compared to $3,153 on a 30-year and $4,281 on a 15-year. The monthly savings of $311 versus a 30-year term may sound appealing, but the true cost is significant: you pay $1,225,359 in total interest over 50 years versus $655,173 over 30 years — an extra $570,186. Your equity also builds far more slowly, with most of your early payments going toward interest. A 50-year mortgage can make sense as a temporary affordability tool if you plan to refinance or sell within a few years, but as a long-term strategy it costs substantially more than a conventional 30-year loan.