Florida Mortgage Calculator

Before you fall for a house, run the real number. This tool adds up principal, interest, taxes, insurance, HOA, and PMI so you know your actual monthly payment — not just the sticker price. We're Matt and Lindsey Parham, and we built this the same way we talk to buyers in person: plain numbers, no surprises later. We work Putnam, St. Johns, Clay, and Flagler counties — 827 square miles we know because we've lived here our whole lives.

Why we build our numbers this way

Most buyers hear a purchase price and a rate and stop there. That's not the number that shows up on your bank statement every month. We add in taxes, insurance, HOA and PMI up front because that's the number that decides whether a house actually fits your budget — and because we'd rather tell you that now than after you've put down earnest money.

Principal & interest

This is what actually goes to the lender each month, calculated with the standard amortization formula: M = P [ i(1+i)^n ] / [ (1+i)^n − 1 ], where P is your loan amount, i is the monthly interest rate, and n is the number of payments. Change the rate or term above and watch this number move — it's usually the biggest swing in the whole payment.

Property taxes vary more than people expect

Your county sets a millage rate, and that rate gets applied to your assessed value after exemptions. In Putnam and inland St. Johns County, we've seen tax bills differ meaningfully between two homes a few streets apart, depending on the taxing districts each parcel falls in — fire district, water management, school district all stack up differently. If you're claiming the home as your primary residence, file the Florida Homestead Exemption. It lowers your taxable value and slows how fast your assessment can climb after that.

Insurance — and the acreage wrinkle

Florida homeowner's insurance runs higher than most of the country because of hurricane risk, and that's true here too. What's different on the rural and riverfront properties we sell a lot of is the extra questions an insurer asks: is there a well, is there a septic system and when was it last serviced, is the roof original. Newer roofs and wind mitigation features can knock the premium down noticeably — worth asking your agent to pull that history before you assume a number.

Flood insurance on the St. Johns River corridor

Standard homeowner's insurance does not cover flood damage — full stop. If a property sits in a FEMA Special Flood Hazard Area, which describes a fair number of parcels along the St. Johns River and its tributaries out here, your lender will require a separate flood policy through the NFIP or a private carrier. We tell every buyer looking at riverfront or low-lying acreage to pull the flood zone before falling in love with the view. See our Florida flood zones guide for how the zone designations work.

HOA dues — less common than you'd think out here

A lot of the neighborhoods in Palatka and rural Putnam County don't have an HOA at all, which is part of why people move here — the small-town feel isn't managed by a board. Where dues do exist, whether in a St. Johns County subdivision or a river community, they factor into your qualifying ratio the same as a mortgage payment does, so we always confirm the current due before you write an offer.

PMI — and why it matters less than buyers think

PMI kicks in on a conventional loan when you put down less than 20%. Federal law requires your lender to cancel it automatically once your loan balance hits 78% of the original purchase price, and you can request removal yourself at 80%. We mention this because a lot of first-time buyers assume they need to save up 20% before they can buy at all — for a lot of properties around here, that's simply not true.

One-time costs this calculator doesn't show

Beyond the monthly number, plan for these closing-table costs — we walk every buyer through them before contract, not after:

• Documentary stamp tax on the deed — charged per $100 of the sale price, negotiable as to who pays it.
• Doc stamps and intangible tax on the mortgage — a separate tax on the loan amount itself.
• Title insurance — customarily seller-paid in Florida, but that's a negotiating point, not a guarantee.
• 4-point inspection — most insurers require one on older homes before they'll write a policy; get it done early so it doesn't hold up your closing date.
• Wind mitigation inspection — usually pays for itself in the insurance discount, especially on newer roofs.
• Well and septic inspection — standard on rural Putnam County properties, and not optional if you're financing. Budget for it the same way you'd budget for a home inspection.

Frequently asked questions