The Quick Read: The payment jumps because principal repayment starts, and the size of the jump depends on your balance, your repayment term, and where your variable rate sits at that point. Published estimates run from roughly 20% to more than double, and no authoritative national average exists. Your own agreement holds the real answer.
- During the draw period, the minimum payment is often interest only, so the balance never shrinks.
- When the draw ends, the line freezes and the full balance is re-amortized over the repayment term.
- A shorter repayment term, a larger balance, or a higher variable rate all make the jump bigger.
- A balloon structure can make the entire balance due at once.
- On an investment property, the line caps at $500,000, and the draw and repayment terms are fixed by the program.
A HELOC (home equity line of credit) is a revolving line secured by a property you own. For a rental investor, it can look like cheap flexibility. The catch is that the payment you see on day one is not the payment you will carry on day 3,000. Here is how the step-up works, how big it gets, and how to plan around it.
How large a line the equity supports.
An equity line is sized by combined loan-to-value, occupancy, and credit — not by rental coverage. Switch the occupancy or the credit band and the ceiling moves with it.
Investment-property lines require a 700 minimum credit score; second-home lines start at a 640 minimum and primary-residence lines at 600, and the combined-LTV ceiling steps down as the credit band drops on primary-residence and second-home lines and holds on investment-property lines; the line cap steps down on primary-residence lines and holds at every tier on investment-property and second-home lines.
A debt-to-income ratio above 45% requires 680+ credit. Profiles under 640 are limited to single-family homes. At least 75% of the approved line is drawn at closing. Ceilings, floors, and caps update from Lendmire’s centralized guideline source.
Line estimate
Illustrative estimate only — not a quote, Loan Estimate, approval, or commitment to lend. The rate is an editable assumption; equity-line pricing is variable through both the draw and repayment periods and never converts to fixed. Occupancy and credit drive the ceiling together: an investment property tops out at 70% combined LTV (minimum credit 700, line cap $500,000); a second home tops out at 90% combined LTV (minimum credit 640, line cap $500,000), with the ceiling stepping down as the credit band drops (the cap holds at every tier); a primary residence tops out at 90% combined LTV (minimum credit 600), and its $750,000 maximum line is available only at 75% combined LTV or below with a 700-or-better credit profile (720 on the longer-runway program) and a full appraisal. Lines above $500,000 require a full appraisal. Credit, debt-to-income, property type, and full underwriting review all affect the final line.
What Actually Happens When the Draw Period Ends?
When the draw period ends, you can no longer borrow, and the line enters a repayment period. The lender sets a schedule that pays off the whole balance. Payments are often significantly higher, and in some plans the entire amount comes due at once.
That is how the CFPB describes the HELOC lifecycle. It also notes that repayment schedules often run over ten or 20 years.
Think of it as two different loans wearing one name. The draw phase is a credit line with a small, interest-only bill. The repayment phase is a fully amortizing loan, meaning every payment covers interest and chips away at principal. Nothing about your property or your tenants changed. The loan’s design did.
Why Does the Payment Jump?
The payment jumps because principal gets added to it. Interest-only means you pay only the cost of borrowing. Once amortization starts, the lender needs the balance gone by the end of the term, so each payment must carry principal too.
The CFPB’s HELOC brochure confirms that some plans allow interest-only payments during the draw, so no principal is paid at all. That is the setup for a step-up.
Many people think the payment only rises if interest rates rise. That is wrong. Re-amortization alone raises it. A rate increase stacks on top.
Here is the sequence, step by step:
1. Draw phase. The minimum is often interest on the drawn balance only.
2. The line freezes. New draws stop. Whatever you owe becomes the amount to repay.
3. Re-amortization. The lender computes a payment that retires the full balance over the repayment term.
4. First repayment bill. That payment arrives with no phase-in. Your agreement will confirm it.
Key Terms Defined
Draw period: The stretch when you can borrow from the line and often pay interest only.
Repayment period: The stretch after the draw ends, when you can no longer borrow and must pay down principal.
Amortization: A payment schedule where each payment covers interest plus some principal, so the balance reaches zero by the end.
Balloon payment: A single large payment of the remaining balance, due at the end of a term instead of being spread across payments.
Variable rate: A rate built from an index plus a margin, so it can move over time.
CLTV (combined loan-to-value): All loans secured by the property, added together, divided by the property’s value.
How Big Is the Jump?
It depends, and honest sources say so. Consumer-education pages give a wide spread. Experian says payments can more than double compared with the interest-only stage, though that page is several years old. Some calculator sites claim far bigger figures. None of these is a national statistic.
So treat the numbers as a range, not a rule. Four things set where you land:
| Factor | Effect on the jump |
|---|---|
| Balance at end of draw | Bigger balance, bigger payment |
| Repayment term length | Shorter term, bigger step-up |
| Rate at conversion | Higher rate, bigger payment |
| Structure | Fully amortizing vs. balloon |
Hold three of these constant and move the fourth, and you see the logic. A shorter term compresses the same balance into fewer payments. A higher rate raises the interest share of each one. Paying principal during the draw shrinks the balance that gets re-amortized, which is the one lever fully in your hands.
Is It Only the Draw Ending?
Not always. Three separate things can raise a HELOC payment, and borrowers often blur them together.
| What you notice | Likely cause | What to check |
|---|---|---|
| Payment rose at a set date | Phase change to repayment | Draw end date in your agreement |
| Payment rose mid-draw | Variable rate moved | Index and margin terms |
| Payment rose after a new draw | Higher balance | Statement balance history |
The CFPB notes that many HELOCs base the minimum payment on the current balance. So a new draw raises the bill even if nothing else moved. The worst case is a combined shock: re-amortization and a rate increase landing in the same month.
How Do You Find Your Own Numbers?
Your agreement answers every question here. Pull out these documents and look for these items:
- The HELOC agreement and disclosures. Find the draw end date and the repayment term.
- The note. Look for a balloon clause.
- The rate-adjustment terms. Find the index, the margin, and how often the rate resets.
- Your latest statement. Confirm the balance and whether any principal is being paid.
The CFPB brochure also lists what to ask before you sign. Ask about the index and its current value, the length of the draw and repayment periods, penalties for overpayment, whether the repayment payment is fully amortizing, and whether a balloon applies. Ask these on day one, not year nine.
What About a Balloon HELOC?
A balloon structure skips amortization and makes the whole balance due when the draw ends. The CFPB brochure warns that a borrower who cannot cover a balloon must refinance, borrow elsewhere, or risk losing the home. Experian also flags balloon repayment as a possibility.
Balloons are less common than they used to be, but they exist. Treat one as a refinance-risk event with a fixed date. You need an exit plan before you draw, not after.
How Does the Jump Hit a Rental Investor Differently?
It hits the cash flow of the rental. A line sized around the interest-only draw payment can look comfortable. Then principal starts, and the same rent covers a much bigger obligation.
Here is the honest broker view: investors tend to size HELOC draws on the draw-period payment. Across our wholesale network, files for investment lines are different from owner-occupied ones, so the terms are worth knowing up front.
On an investment property, the network’s HELOC program tops out at 70% CLTV, requires a credit profile of 700 or better, and caps the line at $500,000. Investment lines run a 5-year interest-only draw followed by a 25-year fully amortizing repayment. At least 75% of the line is drawn at closing. Pricing floats across both the draw and the repayment period and never converts to fixed. Subject to lender guidelines and full file review, those are the terms that shape your step-up. Lendmire’s piece How Much a Rental HELOC Costs When the Draw Is Large Next to the First covers the sizing side.
Two structure points matter here:
- Because pricing floats, you should stress-test the repayment payment at a higher level than today’s.
- Title matters. LLCs and corporations cannot hold title on these lines, so a property already deeded to an LLC needs a vesting change or a different product.
Also keep one rule straight. DSCR compares rent to the full monthly obligation. Clearing 1.00 is not the same as positive cash flow, because repairs, vacancy, management, and utilities sit outside the calculation.
Where the General Rule Breaks
The pattern above has exceptions. Know them before you assume.
- Principal-paying draw periods. If you paid principal all along, the step-up is smaller or absent. The CFPB brochure says some plans require partial principal payments in the draw.
- Balloon structures. Covered above. The jump is the entire balance.
- Rates that moved. The step-up compounds a rate change on top of re-amortization.
- Terms are not universal. A 10-year draw with a 20-year repayment is common in retail HELOCs, but it is not a national rule. Investment lines through our network use the 5-year and 25-year structure.
- Renewal offers. Lenders sometimes encourage you to renew or leave the line open. Renewal terms are not guaranteed.
How Do You Soften the Jump?
You cannot erase it, but you can shrink it.
1. Pay principal during the draw. A smaller balance at conversion means a smaller payment.
2. Stress-test the payment. Model the repayment payment at a higher variable rate, not today’s.
3. Know your term. A longer repayment term lowers the monthly bill but costs more interest over time. A shorter one does the reverse.
4. Size the draw for the repayment, not the draw payment. Borrow only what the rental can carry after principal starts.
What Are Your Options at the End of the Draw?
| Option | What changes | Who it suits |
|---|---|---|
| Repay as scheduled | Principal and interest begin | Borrowers with cash-flow cushion |
| Renew or extend | New draw period, terms not guaranteed | Borrowers the lender will re-approve |
| Refinance the balance | New loan replaces the line | Borrowers with equity and credit |
| Pay off in full | Line closes | Borrowers with a sale or cash event |
For rental investors, a fourth path often deserves a look: a DSCR cash-out refinance. It qualifies primarily on property-level rental income covering the payment, subject to lender guidelines. Across our network, cash-out refinances top out around 75% LTV on a standard rental, with about 6 months of seasoning as the common expectation. For short-term rental collateral, the cash-out ceiling is 70%. Loan terms are set at closing, with a 30-year fixed option and, through select lenders, extended terms or interest-only periods. For the full picture, see Lendmire’s complete DSCR loans guide.
Tax treatment can depend on how the funds are used and how the property is held; investors should keep clear records and speak with a qualified tax professional before relying on any deduction.
A Simple Preparation Timeline
Start earlier than feels necessary.
- Two years out: Read the agreement. Confirm the draw end date, repayment term, and any balloon clause.
- One year out: Model the repayment payment at your current balance and at a higher variable rate.
- Six months out: Talk to the servicer about options. Check your credit and your equity.
- Three months out: Pick a path: repay, renew, refinance, or pay off. Line up documents if refinancing.
What If You Can’t Afford the New Payment?
Call the servicer before the date, not after. Ask what renewal or modification options exist. Then check whether a refinance fits: that depends on equity, credit, and property income. If neither works, selling the property or paying down the balance from other assets are the remaining routes. Waiting is the worst move.
Frequently Asked Questions
Can I still borrow after the draw period ends?
No. The line freezes, and new draws stop. Whatever you owe becomes the balance to repay, according to your agreement’s repayment terms.
Why did my HELOC payment go up if I made no new draws?
Either the draw period ended and principal began, or your variable rate moved. Check your statement date against the agreement, then check the rate adjustment terms. Both can happen at once.
Is there a gradual phase-in?
Generally no. The first repayment-period bill carries the full amortizing payment. Your agreement controls, so confirm it, but plan for an abrupt change.
Is a balloon payment common?
Less common than it once was, but real. Check your note for a balloon clause. If one applies, you must refinance, repay, or find another exit when the draw ends.
Does the rate keep changing in repayment?
On a floating-price line, yes. On the investment lines we place through our network, pricing floats across both the draw and the repayment period and never converts to fixed.
If you are considering a home equity line and want to see how the numbers work, Lendmire can help you compare HELOC options based on the property, the equity available, credit profile, combined leverage, and your goals. Lendmire is a broker arranging financing through select lenders in its wholesale network, and HELOC availability covers 16 full-service states, narrower than the 41-market DSCR footprint. Every figure is subject to lender guidelines and file review, and none is a commitment to lend.
About Lendmire
Lendmire — NMLS# 2371349 — is a mortgage broker that arranges home equity lines of credit in its 16 full-service states through wholesale lenders, on primary residences, second homes and investment properties. Every line is subject to the lender’s guidelines and full underwriting. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.
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References
1. CFPB – What is a home equity line of credit?
3. Experian – How does HELOC repayment work?
This article is part of Lendmire’s home equity line of credit program — full qualification details, guidelines, and scenarios live on the program page.
Related reading: Rental HELOC Calculator for a Portfolio Down Payment Strategy · Digital Rental HELOC vs Bank HELOC on a 2 to 4 Unit · Rental HELOC Fees When You Are Protecting a Low First Lien
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
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Legal disclosures. Lendmire (NMLS# 2371349) is a state-licensed mortgage brokerage that arranges financing through wholesale lender relationships. Lendmire is not a direct lender, depository institution, or registered financial advisor. The discussion above is general informational content about real estate financing — it is not financial, legal, or tax advice, and readers should consult licensed professionals for guidance on their individual circumstances. Loan inquiries are subject to lender underwriting; this article does not represent a commitment to lend. Loan terms, rates, and qualification standards vary by borrower, property, and state, and are subject to change at any time. Equal Housing Opportunity. NMLS Consumer Access: nmlsconsumeraccess.org.