Rental HELOC vs. a 401(k) Loan for Your Next Down Payment

The Quick Read: A rental HELOC borrows against equity in a property you own and is underwritten on your credit and that property, while a 401(k) loan borrows from your own plan balance under federal limits, so the better pick depends on your equity, the amount you need, and your job stability.

• A 401(k) loan is repaid from your own plan balance, so your risks are job loss, which can trigger a taxable offset, and the borrowed money leaving the market.
• On the Lendmire network, an investment line tops out at 70% CLTV and $500,000, with a 700 minimum credit profile.
• A 401(k) loan has a hard federal cap, and your plan may set it lower or not offer loans at all.
• Both only fund the down payment. The new rental still has to clear its own rental-coverage test.

A rental HELOC fits the investor who already holds meaningful equity in a rental, has strong credit, and needs a larger sum. A 401(k) loan fits the investor with a modest gap to fill, a plan that allows loans, and a steady job. Neither one replaces the equity-plus-coverage test a DSCR purchase has to pass. The complete DSCR loans guide covers that purchase side in full.

Side-by-Side

The 401(k) column below reflects published federal norms and typical plan rules. The HELOC column reflects Lendmire’s wholesale network guidelines, which vary by lender and file.

How a Rental HELOC Works on This Network

A rental HELOC on the Lendmire network is a standalone line in first or second lien position, capped at 70% CLTV on an investment property. The line runs up to $500,000, and the borrower needs at least a 700 credit profile. Subject to lender guidelines, credit above 700 does not buy more leverage on an investment line. It buys eligibility only.

Because the line cannot exceed $500,000, it sits in the automated-valuation lane, and a traditional appraisal is commonly not needed. A borrower can still request one.

The structure is a 5-year draw period followed by a 25-year repayment period. At least 75% of the line is drawn at closing, so this is not a product for holding a large unused cushion. The line does not convert to a fixed structure.

DTI tops out at 50%. Qualifying runs on the interest-only payment calculated on the maximum draw, not on what you actually borrow. That matters if you plan to draw only part of the line.

Property rules are strict. Single-family, 2-4 units, PUDs, townhomes, and condominiums are eligible. Manufactured homes, co-ops, condotels, log homes, commercial, mixed-use, and agricultural zoning are not.

Title is the sharpest limit. The rental must be held by the individual borrower or a revocable living trust. LLCs, corporations, partnerships, and irrevocable, blind, or land trusts cannot hold title on this product. A rental already deeded to an LLC needs a vesting change first, or a DSCR cash-out instead. A borrower is also limited to three lines, and an owner of more than 15 financed properties is not eligible.

This product runs in Lendmire’s 16 full-service states, which is narrower than the 41-market DSCR footprint. A 401(k) loan has no such geographic limit.

How a 401(k) Loan Works

A 401(k) loan is a participant loan from your own plan balance, governed by federal tax rules and your plan document. Under the IRS retirement plan loan FAQ, a plan that offers loans can permit up to the lesser of two figures. The first is the greater of $10,000 or 50% of the vested balance. The second is $50,000. A plan may set a lower cap, and not every plan offers loans at all.

Repayment must finish within 5 years, in substantially equal payments made at least quarterly. Payroll deduction is the usual method. The same FAQ says a loan used to buy your principal residence may run longer than 5 years. A rental down payment is not a principal residence, so plan on the 5-year term.

Plans differ in what they allow. Read the summary plan description before you build a purchase around the loan. IRAs, SEP-IRAs, and SIMPLE-IRAs generally cannot offer loans. A solo 401(k) can, if its plan document includes loan provisions.

The Quiet Trap: Leaving Your Job With a Balance

If you leave an employer with an unpaid plan loan, the plan may offset your account balance by the unpaid amount. That offset is treated as a distribution. RSM’s tax alert on qualified plan loan offsets explains that a qualifying offset gets a longer rollover window than the usual 60 days. An offset that is not rolled over becomes taxable income.

How the plan treats an outstanding balance after separation varies by plan document. Some plans let you keep repaying, and others demand the balance. That is a plan-level question to answer before you borrow.

This is the failure mode to price in. A down payment funded this way ties your purchase to your employment for the full repayment period. Tax treatment can depend on how the funds are used and how the property is held; borrowers should keep clear records and speak with a qualified tax professional before relying on any deduction.

When a Rental HELOC Is the Better Fit

A rental HELOC is the better fit when the amount you need exceeds what a plan loan can supply. The 401(k) loan has a $50,000 ceiling no matter how large your balance is. A line against rental equity scales with the property, up to $500,000 on this network.

Picture an investor with a paid-down duplex, strong credit, and a plan that caps loans or offers none. The equity is already built, the line is sized by the property, and nothing is pulled out of retirement. For that investor the HELOC keeps the retirement account compounding.

It also fits when you want to avoid a job-linked obligation. A HELOC does not depend on your employer. A layoff does not create a tax event on the line, though the payment still has to be made.

The cost is concentration of risk. The line is secured by the rental, so missed payments could endanger the property. A vacancy stretch hits twice: rent drops while the line payment continues. Qualifying also runs on the interest-only payment at the maximum draw, so a large line eats DTI room even if you draw less.

An investor who holds rentals in LLCs often finds the equity sits in a property the product cannot take. The options are re-vesting into an individual or revocable trust, or using a DSCR cash-out refinance on that property.

When a 401(k) Loan Is the Better Fit

A 401(k) loan is the better fit when the gap is modest and you lack equity elsewhere. A first-time investor has no rental to borrow against. A 401(k) loan needs no property, no valuation, and no vesting change.

It also suits the investor who wants no collateral risk on real estate. If a payment is missed, the consequence runs through the plan and the tax code, not through a lien on a rental. That is a different risk from a HELOC, not necessarily a smaller one.

Credit is less of a gate. The loan typically does not involve a credit check, which helps a borrower below the 700 floor an investment line requires. Whether a purchase lender counts plan-loan repayments in any ratio depends on the program, so ask before you rely on it.

The costs are real. Borrowed dollars stop growing while they are out of the plan. Repayments are not plan contributions, so they can crowd out your ability to keep contributing. The loan is also small relative to many down payments. At 20% to 25% down, which is where most DSCR purchase files land, the $50,000 cap covers the whole down payment only on lower-priced properties. Terms depend on the lender’s guidelines, the property type, the leverage, and a full review of the credit profile.

What the Purchase Lender Will Still Ask

Either source of funds only solves half the file. The purchase loan has its own tests, and the money you borrowed does not change them.

On the Lendmire network, DSCR purchases most often land at 75% to 80% LTV, which means 20% to 25% down. Select high-leverage programs reach 85% LTV, or 15% down, with roughly a 700+ score. Coverage of 1.00 is where select programs start, not a universal standard. A separate select-lender path goes below 1.00, with leverage and terms adjusted. Most programs want credit around 660, and a 620 floor exists in parts of the network.

DSCR compares rent to PITIA only. Clearing 1.00 is not the same as positive cash flow, because repairs, vacancy, management, utilities, and capex sit outside the calculation. The same goes for the debt you took on to fund the down payment. A HELOC payment or a plan-loan payment is not part of the property’s coverage ratio, but it is still a real obligation on your balance sheet.

Reserves vary by lender, leverage, loan size, and transaction type. About 6 months of PITIA is common. Conservative rate-term files at modest leverage under $1,500,000 can see reserves waived, and larger loans typically step up to about 9 months. Reserves have to be documented separately from the down payment, so one pool of cash cannot serve both.

Expect the lender to ask where the down payment came from. For a 401(k) loan that means the loan agreement, the plan statement, and evidence the funds reached your account. For a HELOC it means the line agreement and the draw record. Whether a given program accepts borrowed funds for the down payment is a program-level question to settle before you go under contract.

Using Both, or Neither

The two sources are not mutually exclusive. An investor might draw a HELOC for the bulk of the down payment and a plan loan for the remainder. The risk is stacking obligations: a line payment, a plan repayment, and the new mortgage can all land while the new property is still in lease-up.

Run the sequence before you commit. Know which constraint binds first, the lender’s equity limit or the plan’s loan cap. Then confirm that the purchase lender accepts borrowed funds, and keep reserves outside the borrowed pool.

A larger down payment lowers the new loan’s monthly payment and can lift its DSCR. It never erases leverage caps, credit floors, reserve rules, or property eligibility. The strongest files clear both tests: enough equity and enough rental coverage. For a cash-out version of this comparison, Lendmire’s piece on whether a bank statement cash-out can fund the next rental covers the refinance side.

Key Terms Defined

CLTV: combined loan-to-value, the total of all liens on the property divided by its value.

Qualified plan loan offset: the reduction of your 401(k) balance by an unpaid loan after you leave your job, treated as a distribution.

DSCR: debt service coverage ratio, the property’s monthly rent divided by its monthly PITIA.

The Verdict

Choose the HELOC when you hold real equity in an individually titled rental, your credit clears 700, and you need more than a plan loan can supply. Choose the 401(k) loan when the amount is modest, your plan allows it, your job is stable, and you have no equity to borrow against. If neither fits cleanly, the DSCR loan itself may carry more of the purchase through its leverage tiers, with a larger down payment as the lever.

Neither option is free money. One puts a rental behind the loan, and the other puts your retirement balance and your employment behind it. Pick the risk you can carry through a vacancy or a layoff.

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 arranges these through select wholesale lenders, and every figure is subject to lender guidelines and full file review. Call 828-256-2183 or request a quote.

About Lendmire

Lendmire (NMLS# 2371349) is a mortgage broker. Home equity lines of credit — on a primary residence, a second home or an investment property — are arranged through wholesale lenders in Lendmire’s 16 full-service states, and every line is underwritten by the lender under its program guidelines. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.

References

1. IRS – Retirement plans FAQs regarding loans

2. RSM’s tax alert on qualified plan loan offsets