Not financial advice. Mortgage FV Calculator is a software calculator, not a personal-finance product or advisory service. It computes standard financial functions and displays the results for your convenience. Nothing here constitutes, or is intended to constitute, financial, investment, tax, legal, mortgage, credit, or insurance advice. Always consult a qualified professional before making any financial decision.
Portland mortgage calculator
A median-priced Portland, ME home at 6.75% over 30 years, with Maine property tax of 1.24% and $1,300 a year of homeowners insurance. Every figure below is computed on our amortising engine — nothing is estimated in the browser.
$4,227 a month, all in
Principal and interest are $3,301; escrow and PMI add the rest. Over the full term the loan costs $679,424 in interest. Discounted at 5%, buying here has a net present value of $-33,613 ($279,395 in today’s dollars).
Within Maine, Portland is the most expensive of the 3 Maine markets covered here. Prices here run 1.93x those in Bangor, the cheapest market listed, so a statewide average badly understates what a purchase costs on this side of the state.
Portland carries a premium over the rest of Maine: a median home here runs $565,500, about 45% above the state median of $390,000. The deposit moves with it, so the same 20% down is $113,100 rather than $78,000.
The price-to-rent ratio here is 21.8 ($565,500 to buy, $2,160 a month to rent), which is high. Renting and investing the deposit is a genuine alternative in Portland, not a fallback position.
Monthly cost in Portland vs comparable rent
Owning is stacked by component; renting is the local median asking rent.
The monthly breakdown
| Median home price | $565,500 |
|---|---|
| Down payment (10%) | $56,550 |
| Loan amount | $508,950 |
| Principal & interest | $3,301/mo |
| Property tax (1.24%) | $584/mo |
| Homeowners insurance | $108/mo |
| PMI while above 80% LTV | $233/mo |
| Total monthly payment | $4,227/mo |
| Comparable rent | $2,160/mo |
What a rate move does to the Portland payment
| Rate | Principal & interest |
|---|---|
| 5.5% | $2,890/mo |
| 6% | $3,051/mo |
| 6.5% | $3,217/mo |
| 7% | $3,386/mo |
| 7.5% | $3,559/mo |
| 8% | $3,734/mo |
Rent or buy in Portland?
Against $2,160 a month in rent, over 7 years renting leaves you about $143,440 better off — $120,671 once 2.5% inflation is stripped out. See the Maine rent-vs-buy page.
Where these numbers come from
Maine medians come from editorial and are refreshed weekly. The Portland figures index those state medians to the local market, so they track the same feed rather than going stale. Insurance and the state income tax rate are editorial. Treat everything here as a planning estimate, not a quote.