How this instrument works
A mortgage pre-qualification letter and a real estate listing's estimated payment both tend to lead with principal and interest, because that figure is identical no matter which house gets bought on the same loan terms. Everything else — property tax, homeowners insurance, private mortgage insurance, and homeowners association dues — is specific to the property itself, and it is exactly what separates two houses with the same loan payment into very different monthly obligations. This instrument totals all five pieces at once, closer to the number a buyer needs before making an offer than the loan payment alone.
Private mortgage insurance is charged only when the loan implies less than 20% equity in the home, and it protects the lender, not the borrower, against the risk of a low-equity default. This sheet computes it as an annual rate against the loan balance, divided into twelve — enter 0 for PMI rate once a down payment reaches that threshold, since that is the point where a conventional lender must let a borrower request cancellation, and where PMI terminates automatically at 78% loan-to-value under the Homeowners Protection Act regardless of whether anyone asks.
A homeowners association fee behaves nothing like the other four inputs: it is a flat dollar figure set by the association's budget, not a percentage of the loan, and it does not shrink as the balance is paid down or vanish once equity crosses any threshold. It typically funds shared reserves — roofs, elevators, landscaping, insurance on common areas — for condominiums and many planned communities, and unlike mortgage interest it is not deductible and builds no equity. Ranking two listings by loan payment alone can put a $150-a-month-HOA condo below a fee-free house that costs less overall once every input here is counted.
- Enter the borrowed amount in Loan amount, $ and the note rate in Annual interest rate, %, then set Loan term, years to match the mortgage.
- Add last year's bill to Annual property tax, $ and your policy's premium to Annual homeowners insurance, $.
- If the down payment is under 20%, set PMI rate, % of loan/year (if down payment <20%) — otherwise leave it at 0 to model equity-secured insurance-free financing.
- Enter any building or community charge into Monthly HOA fee, $; leave it at 0 for a property with no association.
- Compare Principal + interest against Total monthly payment (PITI + PMI + HOA) to see exactly how much tax, insurance, PMI, and HOA add on top.
Worked example — a $300,000 loan with PMI and a $150 HOA fee
A $300,000 loan priced at 7% over 30 years works out to $1,995.91 a month once the amortizing-payment formula is applied — that piece never changes regardless of which house carries the loan. Stack the property-specific costs on top: $3,600 a year in property tax and $1,200 a year in homeowners insurance each split into twelve equal deposits ($300.00 and $100.00 a month), plus a 0.5% PMI charge computed on the loan balance itself, $300,000 multiplied by 0.5% and divided by twelve, for $125.00 a month, since equity here sits under the 20% mark a conventional lender treats as PMI-free.
Fold in a $150 monthly homeowners association due and Total monthly payment (PITI + PMI + HOA) lands at $2,670.91 — $675.00 above the bare loan payment, built from four distinct pieces: $300.00 tax, $100.00 insurance, $125.00 PMI, $150.00 HOA. Set PMI rate to 0 to model the same loan once equity clears 20% and the figure drops to $2,545.91, precisely the size of the gap a buyer weighing a fee-carrying condo against a fee-free house needs to see before either offer goes in.
Questions
How is this total different from a lender's pre-qualification number?
A pre-qualification letter is usually built around debt-to-income limits on principal, interest, and sometimes a rough tax and insurance estimate — it rarely reflects the exact PMI rate a lender will charge or any HOA due tied to one specific listing. Total monthly payment (PITI + PMI + HOA) adds every figure for the actual property under consideration, which is why it can run several hundred dollars above a generic pre-qualified amount.
When does PMI stop being charged on a conventional loan?
PMI drops automatically once the loan balance falls to 78% of the home's original value under the Homeowners Protection Act, and a borrower can request cancellation earlier, at 80% equity, by asking the servicer for a new appraisal. Set PMI rate, % of loan/year to 0 in this sheet to see the payment once that threshold is crossed — the total falls by exactly the PMI line, nothing else changes.
Does a monthly HOA fee affect my loan balance or interest cost?
No — the HOA fee entered here is a flat pass-through to the association, not part of the loan itself, and it never appears in the principal-and-interest formula. Raising or lowering Monthly HOA fee, $ shifts the total dollar for dollar but leaves Principal + interest untouched, which is why two properties with an identical loan can carry very different total monthly costs.
Why might my actual PMI rate differ from what I entered here?
PMI rate, % of loan/year is set by the mortgage insurer based on credit score, loan-to-value ratio, and loan type, so two borrowers on identical loan amounts can be quoted noticeably different rates, commonly somewhere between roughly 0.15% and 1.5% a year. Enter the specific annual rate from a loan estimate or insurer quote rather than a rough guess, since the PMI line scales directly with it.
What does this calculator leave out?
It excludes any upfront PMI premium or lender funding fee charged at closing, an escrow cushion some servicers require on top of the monthly tax and insurance deposit, and costs that fall outside a mortgage bill entirely — utilities, routine maintenance, or a special assessment an association might levy beyond its regular due. Treat the total here as the recurring mortgage-linked payment, not the full cost of owning the home.
Can this compare a condo against a single-family house fairly?
Yes — set Monthly HOA fee, $ to the condo's due and to 0 for the house, keep the other inputs matched, and compare the two Total monthly payment figures directly. Because HOA dues, property tax, and insurance premiums vary independently of the loan itself, two listings priced identically at the same rate can still produce noticeably different totals once every recurring cost is added in.
References
- Consumer Financial Protection Bureau — Mortgages
- Federal Reserve — Consumer's guide to mortgage settlement costs
Read this first: This instrument shows arithmetic, not advice. Real offers add fees, taxes and terms that vary by lender and place — verify the figures against your actual paperwork before deciding anything.