How closing costs are estimated
Buyer closing costs bundle dozens of line items into one number, conventionally estimated as a percentage of the purchase price:
Closing costs ≈ price × rate, with the rate usually between 2% and 5% for buyers.
The big components: lender origination and points (0.5–1.5%), appraisal and credit-report fees, title search and lender's title insurance, escrow/settlement fees, transfer taxes where applicable, and prepaid items — the first year of homeowners insurance plus property-tax and insurance escrow funding. The calculator also shows your total cash to close: closing costs plus the down payment, which is the wire you actually send on settlement day.
Worked example
A $350,000 home with 20% down and a 3% assumption: closing costs ≈ $10,500 (plausible range $7,000–$17,500), down payment $70,000, total cash to close ≈ $80,500. Buyers who budget only for the down payment routinely get surprised by this second five-figure number — which is why lenders require proof of funds covering both.
Ways to shrink the number
Negotiate seller concessions (common in slower markets), ask the lender for a Loan Estimate and compare line-by-line, shop title insurance — pricing varies more than most buyers expect — and schedule closing at month-end to trim per-diem interest. Some lenders offer no-closing-cost mortgages that trade the fees for a slightly higher rate: worth it only if you expect to sell or refinance within a few years.