Almost every number in a mortgage file leans on one ratio. How much you can borrow, whether you pay mortgage insurance, what a HELOC limit can be, how much cash a refinance can take out — each is decided by comparing the loan to the value of the home behind it. That comparison is loan-to-value, and it is simpler than the uses it is put to: one division, honestly labeled, with the lender choosing which value counts. Here is the ratio, the lines it is read against, and the mirror image every homeowner already tracks — equity.
LTV = the loan amount ÷ the home’s value × 100. One labeled example: a $320,000 loan against a $400,000 value is an 80% LTV; a $360,000 loan against the same value is 90%. The value in the lender’s formula is never the hopeful number. On a purchase it is the lower of the contract price or the appraised value — buy above the appraisal and the ratio is computed on the appraisal, which is the arithmetic underneath every appraisal gap. On a refinance or an equity loan it is the current appraised value against the current balance. And equity is the same fraction read from the other side: 100% minus the combined LTV is the share of the home that is yours, which is why the equity line in a homeowner’s record and the LTV line in a lender’s file always move in opposite directions, by the same amount.
The line everyone meets first is 80%. On a conventional loan, a first-mortgage LTV above 80% generally requires private mortgage insurance; at or below it, none is required — and PMI’s own exits are keyed to the same scale, cancellation requestable at 80% of the original value and automatic termination at 78%. Purchase programs set their ceilings above that line: FHA insures loans up to 96.5% LTV (the 3.5% down payment), and VA and USDA loans can reach 100% for eligible borrowers, with their own guarantee and insurance structures standing behind the risk. Cash-out refinances are commonly capped near 80%. None of these lines is a recommendation — a ceiling says how much risk a program will carry, priced back to the borrower in insurance and rate as the ratio climbs, not how much debt a household should take on.
A second loan changes the question from the first mortgage’s ratio to the combined one: CLTV = everything secured by the home ÷ its value × 100. It is the number that caps HELOCs and home equity loans — typically a combined ceiling in the 80–85% range, varying by lender — because in a forced sale every lien is paid from the same value, in order. Worked on the same labeled numbers: a $400,000 value with a $280,000 first mortgage sits at 70% LTV; draw $40,000 on a HELOC and the combined figure is 80%, and the remaining borrowing room is read off the combined line, not the first. An undrawn line is not free space either — lenders commonly set the HELOC limit itself against the CLTV ceiling at approval, reserving the room whether or not it is ever drawn.
Two real levers, and both are slow. The balance falls with every principal payment — faster early in the loan’s life with even a modest extra principal payment, because the early scheduled payments are mostly interest. The value moves with the market and with the home itself: closed sales nearby reprice it, and real improvements, honestly recorded, support it at appraisal time. What does not move a lender’s LTV is an online estimate, however current: the estimate is a model’s read of public records, useful for watching the direction between appraisals, and the appraisal is the only value an underwriter will divide by. Run the ratio on your estimate to plan; expect it to be re-run on the appraisal to decide.
Homeowner HQ does not calculate your loan-to-value for a lender, set your borrowing limit, or lend — the LTV that decides anything is computed by the lender, on the lender’s appraisal, under the loan program’s rules. What HQ keeps straight is the homeowner’s side of the same fraction: the value estimate and everything owed against the home, refreshed monthly by your own agent, so the ratio you plan around is built on the home’s real facts — and the corrections you file here are the same facts an appraiser will be handed.
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. Read the two numbers together and you are reading your own LTV the way a lender will: the tracked value on one side, the balances on the other, the insurance and borrowing lines those numbers imply. When a loan closes or a balance changes, file the statement against the tracked record, and correct any fact about the home in HQ with your own agent the same week, so the home you track stays the home on paper.
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.