Loan HELOC vs Home Equity Loan Calculator
Same house, same amount of money, two very different cost shapes. A HELOC charges interest-only during the draw period, then amortizes; a home equity loan amortizes from day one. This prices both honestly over their full lives.
The HELOC path assumes you draw the full amount on day one and hold it — the worst case for a HELOC and the fair comparison. Drawing only what you need, when you need it, is the HELOC's real advantage and lowers its cost a lot. HELOC rates are variable: if the rate rises 2% during a 30-year HELOC life, its total interest climbs by roughly another $20,000 on $50,000. The fixed loan's number cannot move.
How it works
HELOC: during the draw period you pay interest only — amount × rate ÷ 12 each month, and the balance does not fall. In the repayment period the full balance amortizes like a normal loan. Total HELOC interest = draw-period interest + repayment-period interest. Home equity loan: one fixed amortizing payment from month one; total interest = payment × months − amount. The comparison that matters is total interest AND payment shock: the HELOC jumps from $333 to $418 a month when repayment starts, while the fixed loan asks $492 from the start and is done in 15 years.
Method & worked example
Method: There is no single formula — the answer lives in the two structures. HELOC: interest-only payments (balance × rate ÷ 12) through the draw period, then a standard amortizing payment over the repayment period. Home equity loan: one amortizing payment from month one. This calculator totals the interest of both full paths at a constant rate; real HELOC rates float with prime, which is the fixed loan's structural advantage.
Worked example: On $50,000: the HELOC (8%, 10-year draw, 20-year repayment) accrues $40,000 of draw interest alone and $90,373 in total. The 15-year fixed loan at 8.5% accrues $38,627.
When to use this
- You have quotes for both a HELOC and a home equity loan and the payments alone are misleading
- A renovation will be drawn in phases and you want the flexibility priced honestly
- You are consolidating debt and need to see what the interest-only years really cost
- You want to know the payment shock waiting at the end of a draw period before you sign
How to use it, step by step
- Enter the amount once — both structures price the same dollars.
- Set the HELOC's draw and repayment periods from the offer in front of you.
- Set the fixed loan's rate and the shortest term whose payment you can carry.
- Compare total interest first, then the three payment figures (draw, repayment, fixed).
- Re-run with the HELOC rate 2 points higher to see its variable-rate risk.
- If you will draw in stages, discount the HELOC mentally — this page prices the full-draw worst case.
What the inputs mean
| Input | What it is | Typical values |
|---|---|---|
| Amount to borrow | The same amount priced through both structures — the only fair comparison. | Use your real project or consolidation figure |
| HELOC rate (variable) | Priced off the prime rate; the number can move monthly. | Enter today's rate, then stress-test +2% |
| Draw period (interest-only) | Years you can draw while paying interest only. The balance does not fall. | 10 years is the standard structure |
| Repayment period | After draw ends, the balance amortizes over this window. | 15–20 years typical; payment jumps at the switch |
| Home equity loan rate / term | Fixed from day one; shorter terms slash total interest. | 15 years is a common sweet spot |
Another worked example
A smaller job: $25,000. The HELOC at 7.5% charges $156.25 a month interest-only through a 10-year draw — $18,750 of interest before repayment even starts — then $231.75 a month for 15 years, totaling $35,466 of interest across its life. The fixed loan at 8.0% over 10 years costs $303.32 a month and $11,398 total interest. Shortening the fixed loan's term is what does the damage to the HELOC's case: the HELOC's enemy is never the rate, it is the calendar.
Frequently asked questions
Why is the HELOC's total interest so much higher?
Time. On $50,000 the default HELOC spends 10 years paying interest without reducing the balance ($40,000 of interest), then 20 more years amortizing — $90,373 total interest. The 15-year fixed loan costs $38,627. The HELOC is a flexibility tool; used as a 30-year loan, it is an expensive one.
When is the HELOC actually the better choice?
For staged spending — a renovation drawn in phases, tuition across semesters — where you only pay interest on what you have drawn, and for short holding periods where you repay from a known event (a sale, a bonus). Drawn fully and held for decades, the fixed loan wins; drawn gradually and repaid early, the HELOC can win.
What is the payment shock people warn about?
When the draw period ends, the payment must suddenly cover principal too: $333 a month becomes $418 on the defaults here — and if you kept drawing, or rates rose, the jump is bigger. Any HELOC plan should be tested against the repayment-phase payment, not the draw payment.
Can I pay a HELOC down during the draw period?
Yes — extra payments reduce the balance and the interest charged, and you can usually redraw that room later. That flexibility is the product. The discipline it demands is the catch: minimum payments never reduce the balance on their own.
Which is safer if rates rise?
The fixed home equity loan — its rate and payment are locked for the whole term. A HELOC re-prices with the prime rate, typically monthly. On $50,000, a sustained 2% rise adds roughly $20,000 of interest across a full HELOC life.
🔑 How much equity do you actually have?
Both products lend against the same number. The Home Equity Calculator shows your equity and the borrowable room at 80% and 85% combined loan-to-value.
Can I close a HELOC early?
Yes, though some lenders charge an early-closure fee if you close within the first 2–3 years, and you owe the outstanding balance in full at closure or convert it to the repayment schedule. Read the closure terms before signing — they are the most commonly skipped clause.
Which one is better for a renovation paid in stages?
The HELOC, usually: you draw the contractor deposits as they come due and pay interest only on what is outstanding, so a $60,000 line drawn evenly across a year carries roughly half the interest of a $60,000 lump-sum loan in that year. The risk is discipline — minimum payments never shrink the balance.