Pick your path. Get the right numbers. Move with confidence.

Most people arrive here with a rate they saw in a headline and a payment they hope is real. Those two numbers rarely belong to the same loan. The headline is a weekly survey average for a strong-credit conventional borrower, often with points already priced in. Your file still has a credit band, a down payment, a lock length, and a county tax bill sitting on top of it. Until those are in the same worksheet, the rate is a weather report.

Start with the payment that actually leaves the account. Principal and interest is the piece a calculator prints first. Taxes, insurance, and mortgage insurance are the piece that surprises people at the loan officer's desk. On a typical purchase that gap is several hundred dollars a month, and in a high-tax or high-insurance county it is larger than a quarter-point rate move. The walkthrough is PITI and escrow. Put that full number into the mortgage calculator before you tour.

The second document that matters is the Loan Estimate, not the email quote. Page 1 is the payment and the cash you need at the table. Page 2 is where two lenders stop being the same offer: origination, points, credits, and the third-party fees one of them shops and the other does not. APR is useful only when the lock length and the point structure match. We wrote that comparison as a long read in how to read a Loan Estimate and in APR and discount points.

Approval is a credit test. Debt-to-income divides counted debts plus the proposed housing payment by gross documented income. It does not ask whether you will enjoy the month. The 43 percent figure people still quote is a leftover from an older qualified-mortgage rule. Fannie Mae's manual underwriting guide is tighter, and desktop underwriting can go higher. The approval letter is the wrong household budget. That argument, with the CFPB and Fannie sources, is in debt-to-income is a credit test.

If you are already under contract, the decision that costs real money this week is whether to lock. A quarter point on a $360,000 loan is about $55 a month. Over five years that is a few thousand dollars, not the thirty-year interest total the scare headlines use. Lock when the payment already works and the lock covers the close. Float only if you wrote a ceiling in advance. The framework is lock the payment you can live with. The reason a Fed meeting can leave that quote untouched is in why mortgage rates move when the Fed sits still, and the 55-year spread between mortgages and Treasuries is in what actually affects mortgage rates.

Sellers have a different wrong number: the offer price. Net is what is left after payoff, commission, and the credits that show up after inspection. Rank envelopes by cash and by whether the buyer will still be in contract in six weeks. The worked examples are in seller net proceeds and how to compare offers. This month's market read, which is thinner crowds and the same rate math, is the October housing note.

Rateshive does not lend, lock, or quote a personal rate. The calculators are planning math. The Learn library is the research. Current survey levels live on the market page, and how we source them is in the methodology.