How to Size a Bank Statement HELOC to Cover a Rental Down Payment

The Quick Read: Size the line from the cash the rental needs, then test that number against your equity. The equity math is simple: property value times the allowed combined loan-to-value, minus what you owe on the first mortgage. Rent plays no part in sizing the line. It matters on the purchase loan, where the rent has to carry the new payment.

• On an investment property, the line caps at 70% CLTV and $500,000, with a 700 minimum credit score.
• The line is the lesser of your equity room and the program maximum.
• Divide the line by the down-payment percentage to estimate the price you can reach.
• Down payment, closing costs, and reserves are three separate pots of cash.
• The purchase lender must accept borrowed funds, so ask before you draw.

Most investors size this backward. They ask how much the equity will give them. The better question is how much cash the deal needs, and whether the equity can supply it without choking the new rental’s cash flow. This guide walks through both directions.

Key Terms Defined

HELOC: A home equity line of credit, a revolving credit line secured by a property you own.

Bank statement HELOC: A line that documents your income from 12 to 24 months of deposits, not traditional personal-income documentation. It is reviewed on documented income under the applicable program, subject to lender guidelines.

CLTV (combined loan-to-value): All loans secured by the property, added together and divided by its value.

DSCR (debt service coverage ratio): Monthly rent divided by the full monthly housing payment on the loan: principal, interest, taxes, insurance, and any HOA dues. The purchase loan uses it. The HELOC does not.

DTI (debt-to-income ratio): Your monthly debt payments divided by your monthly income. The HELOC is underwritten on this.

Reserves: Liquid cash left over after closing, held as a cushion.

Seasoning: How long funds have sat in your account before the lender will count them.

What Does a Bank Statement Change?

It changes how income is documented, and nothing else. Leverage, credit, lien position, and property eligibility are still underwritten. The reviewer typically looks at 12 to 24 months of personal or business statements. They strip out transfers between your own accounts, refunds, loan proceeds, and one-time deposits. Then they average what remains.

Business accounts get an expense factor applied. The lender sets it by business type. You do not choose it.

Here is what that means for sizing. Statements prove you can carry the payment. They never raise the equity ceiling. A strong deposit history helps your DTI. It does not lift the 70% cap.

How Much Cash Does the Rental Actually Need?

Start with the purchase, not the equity. Across the wholesale network Lendmire places files with, most DSCR purchases land at 75% to 80% LTV, which means 20% to 25% down. Select programs reach 85% LTV on a purchase, which means 15% down, with roughly a 700+ score. Each tier is subject to lender guidelines and full file review.

Now stack three buckets:

Borrowed money may cover one pot and be refused for another. That is why you size the line above the down payment alone. If the purchase lender wants reserves in your account, a line you plan to draw down to zero will not satisfy that.

Reserves vary by lender, leverage, loan size, and transaction type. A common expectation is around 6 months of the full housing payment, though conservative files at modest leverage can see them waived. Larger loans typically step up. Ask for the number on your specific file before you set the draw.

How Much Line Can Your Equity Support?

Use this formula: property value × CLTV cap − first-mortgage balance = equity room. The CFPB’s HELOC booklet shows the same subtract-the-mortgage logic with a simple example: $100,000 × 75% = $75,000, less $40,000 owed, leaves a $35,000 line.

On this network’s investment-property tier, the cap is 70%. Run the numbers on a rental worth $500,000 with a $225,000 first mortgage. That is $350,000 less $225,000, so $125,000 of equity room. This is a modeled example, not a market figure.

Then apply the program limits. The line is the lesser of your equity room and the $500,000 investment maximum. A few more points shape the result:

• Credit above 700 does not buy more leverage on an investment line. Both 720 and 700 reach 70% CLTV, and 700 is a hard floor.
• A full appraisal begins only above $500,000, so investment lines usually run on an automated valuation, though you can request a full appraisal.
• Draw structure on an investment line is a 5-year interest-only draw followed by a 25-year repayment. Pricing floats and never converts to fixed.
• A borrower is limited to three lines in total, and owning more than 15 financed properties makes you ineligible.

One more catch. Bankrate’s glossary notes a related measure, HCLTV, that counts the full credit line rather than only the drawn balance. An undrawn line still uses up leverage room.

Which Property Should Secure the Line?

The rental itself is capped at 70% CLTV. Primary-residence and second-home lines can reach higher tiers. The 90% CLTV tier exists only on primary and second homes at a 720 or better credit profile. A primary-residence line can go above $500,000, up to $750,000, but only at 75% CLTV, with a full appraisal and a 700 or better credit profile (720 on the longer-runway structure, one of the two wholesale draw structures in the network).

So pledging your home can fund a bigger down payment. The trade-off is real. The CFPB warns that falling behind on a HELOC could cost you the home. You would be putting the roof over your head behind a rental purchase.

Title matters too. Title must be held by you individually or in a revocable trust. LLCs, corporations, partnerships, and irrevocable or land trusts cannot hold title on this line. If a property sits in an LLC, you need a vesting change or a DSCR cash-out refinance instead, subject to program terms.

Eligible properties are single-family, 2-4 units, PUDs, townhomes, and condos, including non-warrantable condos. Manufactured homes, co-ops, condotels, log homes, commercial, mixed-use, and agricultural properties are not offered.

Will the Purchase Lender Accept the Money?

It depends on the program. Many DSCR lenders in the network accept down payment funds drawn from a line on another property, if documented. Some cap how much can be borrowed. The HELOC lender may not care what you spend the money on. The next lender will.

The practical sequence:

1. Confirm the purchase lender’s rule on borrowed funds before you draw.

2. Draw into your own account.

3. Keep the statements and move the money as a documented transfer.

4. Expect large deposits to be traced back to the line.

Lendmire’s piece Can Gift or Business Funds Cover a Bank Statement Loan Down Payment? covers the source-of-funds side in more detail. Seasoning rules for HELOC-sourced funds are program-dependent. Ask before you draw.

Does the Deal Still Work With Both Payments?

This is the test most borrowers skip. The HELOC and the purchase loan are underwritten differently, and both must be paid.

The purchase loan uses DSCR: rent against the new loan’s full housing payment. Select programs start at 1.00, and stronger ratios open better pricing and leverage. A separate select-lender path takes coverage below 1.00, with leverage and terms adjusted. The HELOC is not in that ratio.

The HELOC is underwritten to you. The reviewer looks at credit, equity, existing liens, and DTI, up to 50%. The line is qualified on the interest-only payment calculated on the maximum draw. So a larger line raises your DTI even if you only draw part of it.

Then do the plain-sense check. The rent has to carry the first mortgage and, in practice, the HELOC payment too. Clearing 1.00 does not mean positive cash flow. DSCR compares rent to the housing payment only. Repairs, vacancy, management, utilities, and capex sit outside it.

Also plan for the shift at the end of the draw. The CFPB notes that payments are often significantly higher once repayment starts. A line that pencils during the interest-only years can pinch later.

The cost of all this is simple. You are financing close to 100% of the purchase. That is the reason the strongest files clear two tests: enough equity and enough rental coverage.

A Full Worked Example

Consider an investor eyeing a $400,000 rental at 25% down. The investor owns a $500,000 rental with a $225,000 first mortgage. These are modeled assumptions. These specifics are subject to lender guidelines and a full review of property, leverage, and credit.

• Equity room at 70% CLTV: $350,000 less $225,000, which is $125,000.
• Program cap: $500,000, so equity is the binding limit.
• Cash need: 25% of the price for the down payment, plus closing costs, plus a separate reserve target.
• Price reach: line divided by down-payment percentage. A $125,000 line at 25% down reaches roughly a $500,000 price on paper, but only if nothing is left for closing costs.
• The adjustment: set aside part of the line for closing costs, and hold reserves in a separate account. The usable price drops. Terms depend on the lender’s guidelines, the property type, the leverage, and a full review of the credit profile.

A useful rule of thumb: a line around 25% of the first property’s value can fund a 25% down payment on a property of roughly equal value. That fits the example above. The exact numbers vary by lender and program and follow a full review of property, leverage, and credit.

Sizing Checklist

1. Set the target price and the leverage tier (typically 75%-80% LTV on a purchase). 2. Add up down payment, closing costs, and reserves. 3. Compute equity room: value × 70% − first-mortgage balance. 4. Take the lesser of equity room and $500,000. 5. Ask the purchase lender whether borrowed funds count, and how much. 6. Confirm the HELOC’s DTI works at the maximum draw. 7. Confirm the new rental covers its own loan with room left for the line.

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.

When Another Route Fits Better

Rental cash-out refinances top out around 75% LTV across most of the network, with about 6 months of seasoning as a common expectation. For the BRRRR crowd, the line is bridge capital. The refinance is the exit, and it needs its own appraisal, leverage, and seasoning. For the purchase side, the complete DSCR loans guide is the better next read. Lendmire’s piece on how line size on a bank statement HELOC shapes a rental down payment goes deeper on the sizing side. Final terms depend on the lender’s guidelines, the property type, and the borrower’s complete credit picture.

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 mortgage broker, and these lines are available only in its 16 full-service states. Every figure here is subject to lender guidelines and is not a commitment to lend.

About Lendmire

Lendmire (NMLS# 2371349) is a mortgage brokerage serving homeowners and real estate investors in its 16 full-service states. Home equity lines of credit are arranged through wholesale lending channels; Lendmire brokers the line and the lender underwrites each application under its occupancy-based guidelines. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.

References

1. CFPB – What You Should Know About HELOCs (booklet)

2. Bankrate – Combined Loan-to-Value Ratio

3. CFPB – HELOC brochure