About LoanPayCal

A free, privacy-first mortgage calculator built for American homebuyers.

Why we built this

Most mortgage calculators on the internet are lead-generation tools. They look helpful, but behind the scenes they're collecting your data, showing you ads for mortgage brokers, and trying to sell you loan quotes.

We built LoanPayCal to be the opposite: a clean, accurate, privacy-first mortgage calculator that gives you the full picture — including property tax, home insurance, PMI, and HOA fees — without ads and without trying to sell you anything.

What makes us different

Privacy-first. All calculations run in your browser. Your data never leaves your device, and we never sell or share personal information.
Complete PITI calculation. Most calculators only show principal & interest. We include property tax, insurance, PMI, and HOA — the way lenders actually calculate your monthly payment.
Amortization schedule. See exactly how each payment splits between principal and interest, yearly or monthly.
Extra payment calculator. Find out how much interest you can save by paying a little extra each month.
15 vs 30 year comparison. See the dramatic difference in total interest paid.
Affordability calculator. Enter your income and debts to find your maximum affordable home price.

Our methodology

All calculations use standard US mortgage formulas:

Monthly PI: Calculated using the standard amortization formula: M = P × [r(1+r)^n] / [(1+r)^n − 1]
PMI rates: Estimated using industry-standard ranges: 0.25%–1.00% of loan amount annually, based on down payment percentage.
Property tax: Based on the selected state's average effective tax rate. You can also enter a custom rate.
DTI limits: Affordability calculations use the 28/36 rule (housing costs ≤ 28% of gross income; total debt ≤ 36%).

Trusted Data Sources & E-E-A-T Commitment

LoanPayCal is built on a foundation of transparency and accuracy. While all calculations are performed entirely in your browser using standard US mortgage formulas, we reference and recommend the following authoritative sources so you can independently verify the data and assumptions behind our tools.

Freddie Mac (Federal Home Loan Mortgage Corporation): Freddie Mac conducts the Primary Mortgage Market Survey (PMMS), the longest-running weekly survey of US mortgage rates. We encourage users to check Freddie Mac's published rates to compare against the rates they enter into our calculator. Freddie Mac data is widely used by journalists, researchers, and federal policymakers to track housing market conditions.

CFPB (Consumer Financial Protection Bureau): The CFPB is an independent US government agency that enforces federal consumer financial laws and provides educational resources on mortgage lending. Their guides on Loan Estimates, Closing Disclosures, and the "Know Before You Owe" initiative are essential reading for any homebuyer. Our affordability calculator incorporates the CFPB's recommended DTI thresholds and disclosure practices.

HUD (U.S. Department of Housing and Urban Development): HUD sets the rules for FHA loans, establishes housing policy, and publishes county-level data on fair market rents, median home prices, and HUD-approved housing counseling agencies. We reference HUD guidelines for FHA loan parameters and down payment assistance programs that may apply to your financial situation.

Our E-E-A-T Commitment: LoanPayCal is designed, built, and maintained with a commitment to Google's E-E-A-T principles — Experience, Expertise, Authoritativeness, and Trustworthiness. Our content is reviewed and updated by the LoanPayCal editorial team, which compiles and verifies each calculator and guide against standard US mortgage formulas and official agency guidance. We do not accept sponsored content, paid placements, or affiliate commissions that could influence the information we present. Every formula we use is documented and open to public verification.

Editorial review process: Every calculator, state guide, and blog post on LoanPayCal is reviewed by our editorial team before publication. Calculations are verified against standard amortization and DTI formulas, and state-specific tax rates and down-payment assistance programs are checked against each state housing finance agency's published guidance. If you spot an error, email hello@loanpaycal.com and we correct it promptly.

Accuracy disclaimer

LoanPayCal provides estimates for informational purposes only. Actual mortgage rates, monthly payments, and loan terms vary based on your credit score, loan type, lender policies, and market conditions. Property tax rates and homeowners insurance costs vary by location and provider.

Always consult with a licensed mortgage professional and get a formal loan estimate before making financial decisions.

Contact

Questions or feedback? Email us at hello@loanpaycal.com.

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