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Mortgage Affordability Calculator

Estimate your monthly payment, total cost of ownership, and whether a home fits within the 28/36 affordability rule. Numbers update as you type.

Loan details

$
%

$80,000

%
%

$4,400 / year

$
$
$

Used for the 28/36 affordability check

Total monthly cost

$2,512

Principal + interest + taxes + insurance + HOA

Principal & interest$1,995
Property tax$367
Home insurance$150
HOA$0

Loan summary

Down payment$80,000
Loan amount$320,000
Total interest paid$398,321
Total cost of loan$718,321

Affordability

Comfortably within the 28% front-end ratio

Housing-to-income ratio25.1%
Monthly income$10,000
Monthly housing cost$2,512

Loan amortization

$320,000 over 30 years

How your remaining balance falls and where each payment goes — principal builds equity, interest is the lender's fee.

Over 30 years, a $320,000 loan accrues $398,321 in total interest. Remaining balance falls from $320,000 at closing to $0 at end of year 30. Half of the principal is paid down by year 22.

Year-by-year loan amortization for $320,000 over 30 years
YearRemaining balanceCumulative principal paidCumulative interest paid
At closing$320,000$0$0
Year 1$316,334$3,666$20,278
Year 2$312,428$7,572$40,316
Year 3$308,265$11,735$60,097
Year 4$303,830$16,170$79,606
Year 5$299,103$20,897$98,823
Year 6$294,067$25,933$117,731
Year 7$288,700$31,300$136,308
Year 8$282,981$37,019$154,533
Year 9$276,887$43,113$172,383
Year 10$270,393$49,607$189,834
Year 11$263,473$56,527$206,858
Year 12$256,100$63,900$223,428
Year 13$248,243$71,757$239,515
Year 14$239,870$80,130$255,087
Year 15$230,948$89,052$270,109
Year 16$221,441$98,559$284,546
Year 17$211,310$108,690$298,359
Year 18$200,515$119,485$311,508
Year 19$189,012$130,988$323,949
Year 20$176,754$143,246$335,635
Year 21$163,692$156,308$346,517
Year 22$149,774$170,226$356,543
Year 23$134,942$185,058$365,656
Year 24$119,138$200,862$373,795
Year 25$102,297$217,703$380,898
Year 26$84,351$235,649$386,897
Year 27$65,229$254,771$391,718
Year 28$44,852$275,148$395,285
Year 29$23,138$296,862$397,515
Year 30$0$320,000$398,321

What this calculator doesn't show

Two homes priced identically can carry wildly different monthly costs depending on which Sun Belt state they sit in. These are the factors that move the dial most across our 12 metros.

Property tax

Effective rates vary nearly 4× across the region

Texas pays the highest property tax in the country among states without an income tax — the trade-off is no state income tax. Arizona and Tennessee sit at the other end.

Texas
~1.58%
Florida
~0.90%
North Carolina
~0.80%
Georgia
~0.77%
Tennessee
~0.50%
Arizona
~0.43%

Within FL, Tampa runs ~1.10% and Jacksonville ~0.89%. High local school M&O rates push some TX counties above the statewide average.

Homeowners insurance

Florida and coastal Texas pay 2–3× the national average

FL averages roughly $7,100/year and TX $4,900/year against a $2,540 national figure. Arizona, inland North Carolina, Tennessee, and Georgia sit at or below national.

  • FL Citizens is the state-run insurer of last resort. As of January 2026, Citizens policyholders with $400k+ homes must also carry flood insurance.
  • TX windstorm: 14 coastal counties may need a separate TWIA wind-and-hail policy on top of standard homeowners.
  • Hurricane deductible: in FL, TX, and coastal NC this is a separate percentage deductible (typically 2–10% of dwelling coverage) that only applies during a named storm.

State income tax

Three of six states levy no income tax

That free cash flow can absorb a lot of mortgage payment — most meaningful in Texas, where high property tax eats some of the advantage back. Eight of our 12 metros sit in zero-income-tax states (all four TX, all three FL, plus Nashville).

Texas, Florida, Tennessee
None
Arizona
2.5% flat
North Carolina
3.99% flat
Georgia
5.19% flat

NC's final phasedown step took effect Jan 2026. GA's rate continues to decline conditional on state revenue triggers.

Homestead protections

Texas and Florida cap how fast your tax bill can grow

Both protections only kick in once you claim homestead status on a primary residence — which means the first-year tax estimate from any calculator can overstate what a long-time owner actually pays.

  • Florida — Save Our Homes: assessed-value increases capped at 3% (or CPI, whichever is lower; 2.7% for 2026). Up to $50k in exemptions, and up to $500k of accumulated benefit is portable to a new FL home.
  • Texas — School exemption: $140,000 off taxable value (raised from $100,000 in 2026) plus a 10% annual cap on assessed-value growth. Senior or disabled homeowners get an additional $60,000.
  • NC, GA, AZ, TN: only standard exemptions — no equivalent assessed-value cap.

Special district fees

The line item nobody flags in new-construction Florida and Texas

Newer master-planned communities in FL and TX often sit inside a special district that finances roads, water, and amenities through bonds — repaid by an annual fee on top of property tax. These don't appear anywhere in a standard tax estimate.

Florida — CDD

Community Development District. $1,000–$3,000/year typical; Tampa-area communities can run $4,000+. Bonds last 20–30 years.

Texas — MUD / PID

Municipal Utility / Public Improvement District. $1,000–$4,000+/year typical. Bonds last 20–40 years. Often invisible until the closing disclosure.

Tip: drop a CDD/MUD estimate into the calculator's “HOA (monthly)” field as a rough proxy until you have the actual figure for a specific community.

Figures as of early 2026 and reflect statewide averages — your specific county, ZIP, and home age can swing the numbers materially. Sources: Tax Foundation, Insurance.com, Bankrate, Florida Department of Revenue, Texas Comptroller, TWIA, Citizens Property Insurance Corporation. Confirm specifics with a local lender, insurance broker, and tax assessor.

How the calculations work

Principal & interest uses the standard amortisation formulaM = P · r(1+r)n / ((1+r)n−1)where P is the loan amount, r is the monthly rate, and n is the number of monthly payments.

Affordability rule: lenders typically look for a front-end ratio (housing cost ÷ gross income) at or below 28%, and a back-end ratio (total debt ÷ gross income) at or below 36%. This calculator checks the front-end ratio only; you would layer on other debt payments for a full underwriting view.

Not financial advice. Actual rates, taxes, and insurance vary by lender, market, and property. Use this as a first-pass estimate and confirm specific figures with a lender and insurance broker.