Suffolk County Mortgage Calculator
On the Suffolk County median home price of $540,000, a 20%-down, 30-year loan at today's 6.47% rate runs about $3,695/month — $2,722 principal & interest, $833 property tax at Suffolk County's 1.85% effective rate, and $140 homeowners insurance. That is about $248/month more than the New York state-average tax rate would cost on the same home. Enter your own price and down payment below.
$3,695 /mo
P&I: $2,722 · Tax: $833 · Insurance: $140
Loan amount: $432,000 · Total interest: $547,926
Yearly amortization schedule
| Year | Interest | Principal | PMI | Balance |
|---|---|---|---|---|
| 1 | $27,808 | $4,856 | — | $427,144 |
| 2 | $27,484 | $5,180 | — | $421,964 |
| 3 | $27,139 | $5,525 | — | $416,439 |
| 4 | $26,771 | $5,893 | — | $410,546 |
| 5 | $26,378 | $6,286 | — | $404,260 |
| 6 | $25,959 | $6,705 | — | $397,554 |
| 7 | $25,512 | $7,152 | — | $390,402 |
| 8 | $25,035 | $7,629 | — | $382,774 |
| 9 | $24,527 | $8,137 | — | $374,636 |
| 10 | $23,985 | $8,680 | — | $365,957 |
| 11 | $23,406 | $9,258 | — | $356,699 |
| 12 | $22,789 | $9,875 | — | $346,823 |
| 13 | $22,131 | $10,533 | — | $336,290 |
| 14 | $21,429 | $11,236 | — | $325,055 |
| 15 | $20,680 | $11,984 | — | $313,070 |
| 16 | $19,881 | $12,783 | — | $300,287 |
| 17 | $19,029 | $13,635 | — | $286,652 |
| 18 | $18,120 | $14,544 | — | $272,108 |
| 19 | $17,151 | $15,514 | — | $256,594 |
| 20 | $16,117 | $16,548 | — | $240,046 |
| 21 | $15,014 | $17,651 | — | $222,396 |
| 22 | $13,837 | $18,827 | — | $203,569 |
| 23 | $12,582 | $20,082 | — | $183,487 |
| 24 | $11,244 | $21,420 | — | $162,067 |
| 25 | $9,816 | $22,848 | — | $139,219 |
| 26 | $8,293 | $24,371 | — | $114,848 |
| 27 | $6,669 | $25,995 | — | $88,852 |
| 28 | $4,936 | $27,728 | — | $61,124 |
| 29 | $3,088 | $29,576 | — | $31,548 |
| 30 | $1,117 | $31,548 | — | $0 |
Rates: Freddie Mac PMMS (wk 2026-06-18). Property tax: Tax Foundation. Insurance: Insurance.com. PMI applies when your down payment is under 20% (LTV > 80%). You can request cancellation at 80% LTV; the servicer must auto-terminate it at 78% (Homeowners Protection Act). How we calculate →
Monthly payment breakdown for a Suffolk County home
At the Suffolk County median home price of $540,000, a conventional 30-year loan at 6.47% with 20% down splits into: $2,722 principal & interest, $833 property tax, and $140 homeowners insurance — a total PITI of $3,695/month.
The property tax line uses Suffolk County's real effective rate of 1.85% (median tax bill of $10,001 on a median home value of $539,500, US Census ACS), not a generic national average — so this figure reflects what Suffolk County actually charges, before any local exemption.
Suffolk County vs the New York state average property tax rate
Suffolk County's 1.85% effective property tax rate is above New York's 1.3% state average. On the same $540,000 home, that difference works out to $248/month more in the tax line of the mortgage payment compared with paying the New York average rate instead of Suffolk County's.
Property tax is set locally — by the county, city and school district — so the state average is only a rough guide. Two otherwise identical New York homes in different counties can carry meaningfully different monthly payments purely because of where the tax rate lands.
What the Suffolk County median buys vs a $400,000 national budget
A $400,000 home taxed at Suffolk County's 1.85% rate and insured at New York's average would run about $2,773/month — $922 less than the Suffolk County county median payment of $3,695/month, since Suffolk County's median home price ($540,000) is $140,000 above the $400,000 reference used elsewhere on this site.
In other words, price — not tax rate — usually drives the biggest gap between a Suffolk County payment and a generic national estimate. Use the calculator above to swap in your own target price.
PMI in Suffolk County if you put down less than 20%
Putting 10% down instead of 20% on the same $540,000 Suffolk County home adds private mortgage insurance (PMI) of about $324/month, bringing the total payment to roughly $4,359/month instead of $3,695. PMI is required on conventional loans below 20% down and cancels automatically once your loan balance reaches 78% of the original price.
Suffolk County mortgage — frequently asked questions
How much is a mortgage payment in Suffolk County?
On the Suffolk County median home price of $540,000, a 20%-down 30-year loan at 6.47% runs about $3,695/month total (principal, interest, property tax and insurance).
What is the property tax on the median home in Suffolk County?
Suffolk County's effective property tax rate is 1.85%, which works out to about $833/month ($9,990/year) on the $540,000 county median home value.
How does Suffolk County property tax compare to the rest of New York?
Suffolk County's 1.85% effective rate is above the New York state average of 1.3%, a difference of about $248/month on a $540,000 home.
What income do I need to afford a home in Suffolk County?
Using the common 28%-of-gross-income guideline against the $3,695/month PITI payment on the Suffolk County median home, that implies a gross annual income of roughly $158,347.
How much does PMI cost in Suffolk County with less than 20% down?
Putting 10% down on the $540,000 Suffolk County median home adds about $324/month in PMI, for a total payment near $4,359/month instead of $3,695.
What's included in a Suffolk County mortgage payment?
PITI: principal and interest together $2,722, property tax $833 at Suffolk County's 1.85% rate, and homeowners insurance $140 at the New York state average — no HOA dues assumed unless you add them above.
More New York counties in this pilot
New York mortgage calculator · Suffolk County property tax deep-dive — the full county-by-county property tax breakdown behind this payment estimate.
Mortgage calculators in other pilot counties
Researched & verified by the Calcuris Data & Research Team. How we build and check our tools →