The Quick Read: Interest-only on a HELOC means the monthly payment covers only the interest on what you have borrowed, so the balance stays flat until the repayment phase begins, and at that point principal is added and the payment typically rises sharply, and because pricing is variable the payment can move even when you borrow nothing more.
- A HELOC is a revolving line secured by property. The draw period is when you can borrow, and the repayment period is when you cannot.
- Interest-only is a common plan feature, not a universal rule. Some plans require principal and interest from day one.
- Across our wholesale network, the draw structures are 3 years interest-only with 17 years of repayment, or 5 years interest-only with 25 years of repayment. Investment lines use the 5-year structure only.
- On an investment property, the network ceiling is 70% combined loan-to-value (CLTV), with a 700 minimum credit score and a $500,000 maximum line.
- The end of the draw is the real planning date.
How Do the Draw and Repayment Phases Work?
A HELOC has two phases. During the draw period you can borrow from the line, and on an interest-only plan you pay interest only. During the repayment period you can no longer borrow, and each payment includes principal and interest until the balance reaches zero.
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.
Think of it as a timeline with a hard edge in the middle. Before the edge, the payment tracks the interest on your balance. After it, the lender amortizes whatever you still owe over the remaining term. Amortizing means each payment is sized to pay the balance down to zero by the end of the term.
Experian reports that market draw periods typically run five to 10 years, followed by a 20-year repayment period, with lengths varying by lender. Those are market-wide figures. Our network is narrower. On primary residences and second homes, two structures exist: a 3-year interest-only draw with a 17-year repayment, and a 5-year draw with a 25-year repayment. A few states shorten both windows.
| Phase | What you can do | What you pay |
|---|---|---|
| Draw period | Borrow, and repay principal if you choose | Interest on the balance, at minimum |
| Repayment period | Repay the balance; you can no longer borrow | Principal plus interest |
| Maturity | Line is closed | Balance must be zero |
How Is the Interest-Only Payment Figured?
The payment is the interest that accrues on your outstanding balance. The simple version is: balance, times the line’s annual interest rate, divided by 12. You are charged on what you have drawn, not on the full credit limit.
That is the textbook description. Our network adds a wrinkle that matters. On both wholesale structures, at least 75% of the line is drawn at closing. So you start paying interest on most of the line immediately. The “pay only for what you use” appeal is smaller here than on a line you open and leave undrawn.
Here is the sequence the payment follows:
1. The line opens with a limit set by equity, credit, and the lender’s CLTV ceiling.
2. At least 75% of the limit is drawn at closing.
3. Each month, interest accrues on the drawn balance.
4. Your minimum payment covers that accrued interest and nothing more.
5. Principal stays unchanged unless you send extra.
6. When the draw ends, the payment is recalculated to pay the balance off over the repayment term.
The payment floats because pricing floats, so it rises when the balance rises and when the underlying index rises. That holds through both the draw and the repayment period, and it holds for both structures: pricing never converts to fixed.
What Does One Balance Look Like Across Both Phases?
Say you carry the same balance from the first month of the draw through the last month of repayment, and you never add principal. Your draw-period payment is only interest. On the first day of repayment, the payment is re-sized to retire that same balance over the remaining years.
The Consumer Financial Protection Bureau’s HELOC brochure notes that plans differ. Some require a minimum payment that includes a portion of principal plus accrued interest. Others allow interest only during the draw. It also warns that monthly payments may change even if you do not draw more money.
The step-up is the part that surprises people. The CFPB says payments are often significantly higher once repayment begins. Treat that as a caution, not a forecast. Your jump depends on the balance, the term, and where pricing sits at that point.
| Scenario | Draw-period payment | Repayment-period payment |
|---|---|---|
| Same balance, pricing unchanged | Interest only | Principal and interest, noticeably higher |
| Same balance, index moves up | Rises with the index | Rises further, on top of the step-up |
| Balance paid down during the draw | Falls with the balance | Lower than if no principal was paid |
| Extra draws taken | Rises with the balance | Higher, with the same repayment window |
The third row is the only one where you control the outcome. Principal you pay during the draw shrinks what has to be amortized later.
Key Terms Defined
Draw period: The window when you can borrow from the line and, on an interest-only plan, pay just the interest.
Repayment period: The phase after the draw ends, when borrowing stops and payments include principal.
CLTV (combined loan-to-value): All loans secured by the property, added together, divided by the property’s value.
Index: The benchmark that a variable price is tied to, so your payment moves when the index moves.
Balloon payment: A structure where the entire remaining balance is due at once when the draw or term ends.
Amortization: Paying a balance down to zero over a set number of payments.
Lien position: Your loan’s place in line behind other loans on the property. A first lien is paid first; a second lien is paid after.
Which Interest-Only Variations Exist?
Three structures cover most of what borrowers run into. Which one you hold is spelled out in the agreement, not assumed from the product name.
Interest-only draw, then amortizing repayment. This is the standard structure and the one our network places. The draw is interest only, and repayment fully amortizes the balance.
Principal-and-interest from the start. Some plans require a principal portion during the draw. The CFPB brochure adds that this portion typically does not repay the principal by the end of the term, so a balance can remain.
Interest-only with a balloon. In some plans, the whole balance becomes due when the draw ends. The CFPB says you may have to pay back the entire amount you borrowed as soon as the repayment period begins. Experian says the same about balloon payments.
Our network’s draw-and-repay structures fully amortize after the draw. Confirm that in your own documents, because the structure is what sets your exit planning.
How Does Underwriting Treat a HELOC?
A HELOC is underwritten on you and on the property’s equity. A DSCR loan is underwritten on the property’s rent against its payment. That is the core difference, and it explains most of the edge cases below.
For the HELOCs we broker through select wholesale partners, the steps run like this:
1. Credit. A 600 score is the program floor on primary residences. Second homes floor at 640, and investment lines at 700. The score comes from a single-bureau model keyed to the primary wage earner, and the report can be no more than 90 days old at closing.
2. Debt-to-income. The maximum is 50%, and 45% for credit profiles from 600 to 679. A ratio above 45% requires at least a 680 score. The qualifying payment is calculated on the interest-only payment at the maximum draw, so a smaller initial draw does not shrink the test.
3. CLTV tier. The ceiling depends on occupancy and score, as shown below.
4. Valuation. Lines at or below $500,000 ordinarily use an automated valuation, though a higher CLTV may require a secondary valuation. Every line above $500,000 requires a full appraisal, and a borrower may request one in any case.
5. Property and title review. The property type, vesting, and your exposure across financed properties are checked.
| Occupancy | Top CLTV | Minimum credit | Maximum line |
|---|---|---|---|
| Primary residence | 90% (720+ only) | 600 | $500,000 at 90% CLTV; $750,000 at 75% CLTV, 700+ (720 on the longer-runway program) |
| Second home | 90% (720+ only) | 640 | $500,000 |
| Investment property | 70% | 700 | $500,000 |
A line above $500,000 is primary-residence only. It requires a credit profile of 700 or better (720 on the 5-year structure), caps at 75% CLTV, and needs a full appraisal. Every figure is subject to lender guidelines and full file review, and none of this is a commitment to lend.
Pricing is variable on all of these lines, and none of it is a quote.
Where Does the General Rule Break?
The general rule is that a HELOC is a cheap, flexible way to tap equity. It holds for a primary residence with strong credit. It bends on rentals, on entities, and on balloon plans.
Investment-property lines are a narrower market. NerdWallet says you may have a smaller pool of lenders and will not be able to borrow as much as against your primary home. It adds that lenders consider default risk higher on an investment property. In our network, the investment ceiling is 70% CLTV, the line tops out at $500,000, and the draw structure is the 5-year/25-year one only.
An LLC cannot hold title. Title must sit with the individual borrower or an inter vivos revocable living trust. LLCs, corporations, partnerships, and irrevocable, blind, or land trusts cannot hold title. If your rental is already deeded to an LLC, it needs a vesting change or a DSCR cash-out instead. This is the sharpest structural difference from a DSCR loan, and it matters most for a rental held in an entity.
Property types narrow. Single-family, 2-4 units, PUDs, townhomes, and condominiums, including non-warrantable condos, are eligible. Manufactured homes, co-ops, condotels, log homes, commercial, mixed-use, and agricultural-zoned properties are not eligible.
Credit history matters. A bankruptcy needs 4 years of seasoning. Foreclosure-family history is treated differently by each program in the network. One seasons a foreclosure in 7 years and a deed-in-lieu, pre-foreclosure, or short sale in 4. The other declines that history regardless of age.
Exposure limits apply. A borrower may hold at most three lines at once, and a borrower who owns more than 15 financed properties is not eligible.
Listing status can block a file. In a handful of states, a property listed for sale, or listed within the past 60 days, is ineligible.
A line can change after closing. If home values drop, a lender may freeze or reduce an undrawn line, depending on the agreement. This matters less when you drew most of it at closing, which our structures require.
Short-term-rental income is not a HELOC qualifier. The HELOC looks at your personal debt-to-income. Short-term rental rules can vary by city, county, HOA, and property type, so investors should confirm local rules before relying on projected rental income.
Should You Pay More Than Interest?
Yes, if you want the step-up to be smaller. Paying principal is optional on an interest-only line, and it is the only lever that changes the balance. The question is whether the money is working harder somewhere else.
A simple decision frame:
- Pay principal when the line funded a purchase you will hold for years, and you have no higher-return use for the cash.
- Stay interest-only when the line is bridging a rehab or a short hold with a defined payoff, such as a sale or refinance.
- Split the difference by setting an automatic extra payment you can stop if cash tightens.
Interest-only defers the cost rather than reducing it, because the repayment payment is sized to retire the full balance over a shorter remaining term. Tax treatment varies; consult a qualified professional.
Check the agreement before you pay extra. On many lines, paying principal restores available credit. Some lenders charge fees or restrict it.
How Do You Plan for the End of the Draw?
Start planning a year or more before the draw ends. The cliff arrives on a fixed date, and your options narrow as it approaches. The payoff paths are few, and each has its own prerequisites.
Pay it down. Apply sale proceeds, a bonus, or cash flow from other properties directly to the balance.
Refinance into a DSCR cash-out. If the line is on a rental, a DSCR cash-out refinance can replace it. On most files across the network, cash-out tops out around 75% LTV on a standard rental and 70% on short-term-rental collateral. About 6 months of seasoning is the common expectation. Coverage matters here: 1.00 is where many select programs start, while a separate select-lender path takes coverage below 1.00 with leverage and terms adjusted. Clearing 1.00 is not the same as positive cash flow, since repairs, vacancy, management, and capex sit outside the calculation. For the full mechanics, see the complete DSCR loans guide. For a side-by-side with this product, see Lendmire’s comparison of a DSCR HELOC and a DSCR cash-out refinance with interest-only draw payments.
Refinance into another home equity product. Possible, but you must qualify again on credit, DTI, and CLTV at that time.
Ask about renewal or extension. Some lenders offer it, and many do not. Treat it as a bonus, not a plan.
What Should You Confirm Before Signing?
Ask for the agreement and the disclosure booklet, then check each item below.
- Whether the draw period is interest only, or includes a principal portion.
- The draw length, repayment length, and maturity date.
- Whether any balloon applies.
- The index, the margin, and any caps on how far the price can move.
- Whether the price can ever convert to fixed. In our network it never does.
- The minimum draw at closing. Both wholesale structures require at least 75% of the line drawn at closing. One program in the network sets a $1,000 minimum for draws after closing, and some states set it higher.
- Fees, and any restriction on paying principal early.
- Renewal, freeze, and reduction terms.
What Are the Tradeoffs?
| Factor | Advantage | Drawback |
|---|---|---|
| Monthly cost in the draw | Lower than amortizing | Balance does not fall |
| Payment predictability | Easy to calculate | Floats with index and balance |
| Flexibility | Pay extra when you choose | Easy to leave principal untouched |
| Exit | Clear maturity date | Step-up lands on a fixed date |
| Collateral | Uses equity you already have | Your property secures the debt |
Frequently Asked Questions
Are all HELOCs interest-only during the draw period?
No. Some plans require a minimum payment that includes principal plus interest from the start. The CFPB brochure describes both types. Read the agreement and look for the words minimum payment, principal, and balloon before you rely on interest-only assumptions.
Do I owe the whole credit limit?
No. You owe only what you drew, plus interest on that balance. On our network’s structures, though, at least 75% of the line is drawn at closing, so most of the limit is typically owed from the first day.
Why does my payment change when I have not borrowed more?
Because pricing is variable. The payment follows the index, so it can rise or fall even if the balance stays flat. In our network, pricing floats through both the draw and the repayment period and never converts to fixed.
Can I use a HELOC on a rental held in an LLC?
Not directly. Title must be held by the individual borrower or a revocable living trust, and an LLC cannot hold title. A property already deeded to an LLC would need a vesting change, or a DSCR cash-out refinance instead, subject to lender program eligibility.
What is the most I can borrow on an investment property?
On an investment property in our network, the ceiling is 70% CLTV, with a 700 minimum credit score and a line of up to $500,000. Those figures apply to investment properties only; primary residences and second homes follow separate tables. HELOC availability through Lendmire covers 16 states, which is narrower than its DSCR footprint of 41 markets, including Washington, D.C.
Next Step
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 that arranges financing through select lenders in its wholesale network, and every figure above is subject to lender guidelines and full file review.
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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Informational only. Not a Loan Estimate, approval, or commitment to lend. Program availability and eligibility are subject to lender guidelines, credit approval, property review, and underwriting.
References
1. Experian
2. CFPB – What You Should Know About Home Equity Lines of Credit
3. CFPB: What Is a Home Equity Line of Credit HELOC
4. NerdWallet
This article is part of Lendmire’s HELOC & home equity loan program — full qualification details, guidelines, and scenarios live on the program page.
Related reading: How Much Can You Borrow on a DSCR HELOC for a Franchise? · How Much Can You Borrow on an Investment Property HELOC With Interest-Only Payments? · How an Investment Property HELOC Works as a Second Lien Behind Your Mortgage
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
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Required disclosures. Lendmire (NMLS# 2371349) operates as a licensed mortgage broker, not a direct lender or depository. The discussion in this article is general in nature and should not be relied upon as financial, legal, or tax advice — every investment scenario is unique and should be reviewed by a qualified professional. Any loan inquiry is subject to lender underwriting, and this article is not a commitment to lend or a guarantee of approval. Mortgage rates, loan terms, and program guidelines vary by borrower, property, and state, and may change without notice. Equal Housing Opportunity. Verify licensure at NMLS Consumer Access.