Home Equity Loan & HELOC Calculator

Loan, HELOC, Cash-Out Refi & Personal Loan

The CLTV Rule That Decides Everything

Combined loan-to-value — (first mortgage balance + new second lien) ÷ appraised home value — is the first filter on every home equity application, and it decides your fate before anyone looks at your credit score. Lenders cap it because the second lien loses first in foreclosure: if prices fall 10% and you borrowed to 95% CLTV, the second lender’s collateral is already underwater. The cushion between your total debt and the home’s value is their margin of safety, and every pricing tier, approval decision, and rate quote flows from it.

The formula is simple — maximum loan = (home value × CLTV cap) − mortgage balance — but each input has teeth. Home value means the lender’s appraised value or automated valuation, which routinely lands 3–8% below listing-site estimates, especially after fast price run-ups. The cap is 80% for the best rates at most banks. And the mortgage balance is the payoff figure, not your last statement. Plug in optimistic numbers and you’ll fall in love with a project budget no lender will fund — then pay for a second appraisal after restructuring. Work it with conservative numbers first; the “Use max at 80% CLTV” button in the calculator does exactly that in one click.

Notice the gap that surprises everyone: $170,000 of equity produces only $80,000 of borrowing at standard caps. That $90,000 cushion stays with the lender, untouched, as insurance against price drops and selling costs. Borrowers who confuse “equity” with “available” waste weeks — and often an appraisal fee — chasing a number that was never on the table. If your project needs more than the cap allows, the honest fixes are paying down the first mortgage, waiting for documented appreciation (a new appraisal after real comparable sales, not hope), choosing a lender that genuinely offers 85–90% tiers, or scaling the project. What doesn’t work is applying everywhere at 95% CLTV and collecting hard inquiries.

One state plays by its own written rules: Texas caps all home-equity debt at 80% CLTV by state constitution, limits fees to 2% of the loan, mandates a 12-day cooling-off period, and allows only one home equity loan at a time. If the property is in Texas, treat 80% as law, not lender preference. A handful of other states add their own wrinkles — New York’s mortgage recording tax, for example, makes larger second liens disproportionately expensive unless structured carefully — but Texas is the only state where the constitution itself sets your borrowing ceiling. Details live in our loan vs. HELOC guide and the qualifying walkthrough below.

Appraisals: the Number That Overrules Yours

Almost every second lien requires a valuation, and it comes in three strengths. A full walk-through appraisal — a licensed appraiser measuring, photographing, and comparing your home to recent nearby sales — carries the most weight and costs $300–$700, often passed to you at closing. A drive-by or desktop appraisal uses photos and records without full access and runs cheaper but more conservative. An automated valuation model (AVM) is an algorithm’s instant estimate, the cheapest and the most skeptical of unique or recently renovated homes. Lenders choose the strength; hotter markets and higher CLTVs push them toward full appraisals, because the risk of an inflated value falls on them.

Protect yours before the appraiser arrives: document every improvement with costs and dates, because appraisers can only credit what they can verify — a $40,000 kitchen with receipts beats a vague “updated kitchen” every time. Tidy the exterior and fix the small visible defects (peeling paint, broken fixtures) that signal deferred maintenance and invite condition adjustments. And never anchor the conversation to a listing-site estimate; instead, pull three genuinely comparable closed sales within half a mile and six months, and have them ready. If the value still lands low, you have two honest moves: accept the smaller line the math supports, or pause and reapply after documented comparable sales strengthen — paying for a second appraisal on the same weak comps just doubles the fee. Remember that falling markets cut both ways: a 10% price drop on a $450,000 home erases $45,000 of borrowing power at 80% CLTV, which is exactly why lenders keep that cushion and why you should never borrow the maximum unless the payment survives a down year.

How Lenders Actually Underwrite a Second Lien

Past the CLTV gate, underwriters score four things. Credit: 620 is roughly the floor for approval anywhere mainstream, 680+ opens normal pricing, and 740+ unlocks the advertised best rates — second-lien pricing tiers are steeper than first-mortgage ones, so a 40-point score gap can cost a full percentage point. Debt-to-income: most lenders cap total monthly debts near 43–50% of gross income including the new payment. Run it yourself: $1,800 mortgage + $400 car and cards + a $620 equity payment = $2,820 ÷ $8,000 gross income = 35.3% DTI — comfortably inside. At 47% you’ll need to pay down a debt or borrow less; at 55%+ expect a decline regardless of score. The Affordability check in the calculator meters this automatically, with flags at both bands.

Collateral condition and liens: the appraiser confirms the home’s condition and the title search confirms lien position — existing HELOCs, tax liens, or judgments all count against your CLTV math, and a fixer with deferred maintenance can take a condition adjustment. Income documentation: W-2 borrowers sail through with pay stubs; self-employed borrowers should prep two years of returns, because second-lien underwriting discounts variable income harder than purchase underwriting. Typical timeline from application to funding is 2–6 weeks: docs and credit pull in days 1–3, valuation plus underwriting in days 4–14, approval and disclosures, then a federally mandated 3-day right of rescission on primary homes before money moves. HELOCs fund right after rescission as an open line; fixed loans fund as one lump sum.

HELOC Phases Without the Surprise

The draw period feels like a credit card: borrow up to the limit, pay interest (often only interest) on what you drew, repay and re-borrow freely. The repayment period feels like a loan: borrowing freezes and the balance amortizes over 10–20 years. The shock that blindsides borrowers is pure arithmetic. Take a $40,000 draw at 9%: interest-only costs $300/month for ten comfortable years — then repayment demands about $406/month for fifteen years, and that’s before any rate movement. Three numbers, one debt, and most borrowers only ever budgeted the first.

Professionals budget backwards from that table: size the draw so the stressed repayment fits, not the teaser. Three habits separate comfortable HELOC borrowers from cautionary tales. First, pay principal during the draw even when only interest is due — every $1,000 prepaid at 9% skips roughly $1,700 of lifetime interest and softens the repayment jump. Second, keep utilization under half the line: a maxed-out line plus a rate rise is the double-hit behind most HELOC defaults, and high utilization drags credit scores until it’s paid down. Third, price intro rates honestly: a 3.99% teaser for 12 months saves real money early, but the loan reprices to prime-plus-margin after — model the intro in our HELOC calculator and confirm the post-intro payment fits before you draw, not after rates move.

Rates, Fees, and the APR Trick

Second-lien rates run 1–3 points above first mortgages for a structural reason: in foreclosure the second lien gets paid after the first, so lenders charge for the extra risk. Fixed home equity loans loosely track long-term bond yields; HELOCs track prime and typically move within weeks of Federal Reserve decisions. Your personal markup on top of those benchmarks comes from four dials: credit score (740+ for the best tier), CLTV (each 5% band can add an eighth to a quarter point), DTI, and occupancy — rentals and second homes pay more at every tier, and some lenders won’t write them at all above 80% CLTV.

Fees decide every close race, which is why the APR beats the rate for comparisons. The APR folds fees into an annualized cost, so it already knows what salespeople hope you won’t compute: a 7.99% rate with $1,500 in fees (8.4% effective APR) loses to 8.25% with $0 fees (8.3% APR) whenever you prepay, sell, or refinance within about five years. Our calculator computes that effective APR for both fee handlings — cash upfront or financed into the loan — because financed fees look free but accrue interest for the full term. Enter any lender’s quote as dollars or percent, either handling, and the “true cost” line settles the tie. As a rule of thumb, paying discount points only pays if you’ll keep the loan past break-even: $1,000 to cut 0.25% on $50,000 saves about $7/month — a twelve-year payback most second liens never survive, since the average one is prepaid or refinanced far sooner.

Which Option Fits Your Situation?

• Fixed home equity loan — the signed-bid loan.

  One lump sum, fixed rate, fixed payment. Best for known, one-time bills: roof replacement with a signed bid, debt consolidation, a single tuition payment. Prepay freely — extra principal earns your APR risk-free. Full math in the loan calculator.

• HELOC — the staged-cost line.

  Borrow, repay, re-borrow during the draw; variable rate. Best for phased or uncertain costs: multi-stage remodels, tuition paid semester by semester, a business buffer. Discipline required — the interest-only years feel cheap by design. Model both payments in the HELOC calculator.

• Cash-out refinance — the reset button.

  Replaces your first mortgage with a bigger one and hands you the difference. Wins only when market first-mortgage rates sit below your current rate — otherwise you reprice cheap old debt upward just to reach equity. Compare its closing costs (a full first-mortgage fee stack) against a second lien’s lighter fees.

• Personal loan — the no-lien fallback.

  No appraisal, funding in days, but 10–15% rates over 2–7 year terms make payments brutal per borrowed dollar. Cheaper only for small amounts over short horizons where lien costs would dominate. Never risk the house for a depreciating purchase you could cash-flow.

Seven Expensive Mistakes (and the Five-Minute Fixes)

1. 1

   Borrowing to the advertised max without a payment plan

   Lenders approve maximums; budgets survive payments. Price the monthly payment first, the project second.

2. 2

   Budgeting the HELOC draw payment

   The draw payment is rent on the debt; the repayment payment is the debt. Budget the larger, stressed number.

3. 3

   Comparing rates instead of effective APRs

   Fees hide in rates and show in APRs. Any quote without an APR is a quote you can’t compare.

4. 4

   Using listing-site values for CLTV math

   The lender’s appraisal decides. Run your numbers 5% below your estimate as a matter of habit.

5. 5

   Draining the full HELOC line immediately

   Full utilization plus a rate rise is the classic distress pattern. Draw what the phase needs, keep half in reserve.

6. 6

   Ignoring the 12-day clock in Texas (or rescission everywhere)

   Primary-home second liens carry rescission rights. Plan funding dates around them, not through them.

7. 7

   Raiding equity for depreciating spending

   Cars, vacations, and general bills convert secured wealth into unsecured memories — with foreclosure risk attached.

Turn This Page Into a Decision in Ten Minutes

Run this sequence and you’ll know more than most applicants walking into a bank branch. First, enter home value and mortgage balance, press the max-at-cap button, and write down the fundable ceiling — that’s your project budget’s hard edge. Second, price your scenario (loan or HELOC), add fees the way the lender quoted them, and read the effective APR and true cost, not the payment alone. Third, open Affordability check, enter income and debts, and confirm DTI sits under 43%. Fourth, stress it: extra payments on a loan, +2% on a HELOC. Fifth, download the report and send it to two more lenders asking them to beat the effective APR. The cheapest second lien is rarely the first quote — it’s the third quote, compared properly. Formulas behind every number are published in Methodology.