Short answer: a cash-out refinance replaces your current mortgage with a new, larger one and pays you the difference in cash at closing. It is not a second loan sitting beside the first — the whole balance moves to a new rate, a new term and a new payment. That single fact decides most of whether it is a good idea: you are not just pricing the cash, you are re-pricing every dollar you already owe.
You apply with a lender, the lender appraises the home, and at closing the new loan does three things at once: it pays off your existing mortgage in full, it covers the new loan's closing costs (paid out of the proceeds or rolled into the balance), and it hands you the remainder as cash. From that month on there is one loan, one payment and one servicer. Your equity drops by the amount of cash you took — you have converted part of your ownership into money in hand, and the home still secures everything you owe.
Your equity is your home's value minus what you owe. A lender will not let the new loan exceed a set share of the value: for a conventional cash-out refinance that cap is typically 80%, meaning at least 20% equity stays in the home, while FHA and VA cash-out programs run their own limits and rules, and every lender's exact terms vary. So the most cash available is: value × the cap − your current balance − closing costs. One labeled example: a home appraised at $400,000, $240,000 still owed, an 80% cap — the largest new loan is $320,000, so the cash ceiling is $80,000 before closing costs come out of it. The value in that arithmetic is the lender's appraisal, not an estimate.
The rate applies to everything. If your current mortgage sits at a low rate and today's rate is higher, a cash-out refinance raises the cost of the balance you already had — not just the new cash. A home equity loan or HELOC prices only the new money and leaves the cheap first mortgage alone; that comparison is the one this decision turns on.
The clock restarts. A new 30-year term lowers the payment partly by stretching the debt over more years. Ten years into a mortgage, refinancing into a fresh 30 can mean paying interest on the same house for 40 years in total. A lower monthly payment is not the same as a cheaper loan — compare the total cost over the years you realistically expect to keep it.
It fits when the new rate is at or below your current one, when the cash funds something that builds value or removes more expensive debt, or when one single payment genuinely simplifies a tangle of loans. It tends not to fit when your current rate is well below today's and the cash need is modest or arrives in stages — that is the shape a home equity loan or a HELOC prices better, and the loan-vs-line comparison guide in this series works through that choice. Either way, the amount to take is set by the job the cash has to do, not by the maximum the lender offers.
A Homeowner HQ estimate is not an appraisal. The value and equity tracked in HQ are the preparation — they show you roughly how much room a cash-out refinance could have before you apply — but the lender's own appraisal sets the value in the loan-to-value arithmetic, and the lender's underwriting decides the amount you are actually offered.
Your own agent sends a monthly value update from Homeowner HQ — the estimate, labeled as an estimate, with your equity beside it — and HQ runs on Amazon AWS. Realtors and lenders use the same HQ together: homeowners stay connected to their own agent, and the monthly trend is the honest way to watch what is moving the number. When borrowing against the home is on the table, that tracked value-and-equity line is the starting point you and your agent bring to the lender conversation.
Homeowners are always free. Realtors pay $25/mo to join and lenders join at the $5/mo founding rate, at any book size, with no setup fee; sending messages inside HQ is a $100/mo unlock ($125/mo total for realtors, $105/mo total for lenders). A lender-sponsored realtor joins for $0.
Homeowner HQ is an AI-powered marketing department for agents and lenders — a relationship and revenue engine, not a homeowner database. A homeowner's record routes them back to their own agent; it is never sold and never shown to lenders.