What Is a Second Mortgage on an Investment Property?

A second mortgage on an investment property is a loan secured by a rental you already have a mortgage on. It records behind your first mortgage, gives you the money as a lump sum or a line of credit, and leaves the first loan, and its rate, alone.

Can you take out a second mortgage on an investment property?

Yes. A second mortgage can be recorded behind the first mortgage on a rental, within the lender's limits and your first mortgage's documents. Three things decide whether yours fits: how much room is left under the CLTV cap, whether your first mortgage allows a junior lien, and whether the loan is for a business purpose. The sections below take them in turn. In Texas, the homestead rules are a fourth check, covered in the Texas rental guide.

Lump sum or line of credit

A closed-end second, sometimes called a HELOAN, pays out once, at closing. A HELOC is a revolving line you borrow from and repay over time. USA Mortgage's second mortgage program offers both, a lump-sum second and a line of credit, at a fixed rate. See second mortgage vs HELOC for the side-by-side. If you hold several rentals, pulling equity from several rentals without refinancing covers how to do it property by property.

The result is two loans on one property. Your first mortgage keeps its balance, rate and payment. The second adds a new balance and a new payment, and the lender behind it is usually a different one.

Lien position: who gets paid first

Liens are generally ranked in the order they are recorded. The first mortgage is paid in full before the second receives anything. For a deeper look, read our guide to lien position.

That order matters most when something goes wrong. In Texas, courts have held that foreclosure of a senior lien generally extinguishes junior liens (Diversified Mortgage Investors v. Lloyd D. Blaylock General Contractor, 576 S.W.2d 794 (Tex. 1978)). A second-lien lender carries that risk, and it is one reason second-lien programs cap combined debt. For you, it means the second is real debt on a property that stays pledged to both lenders.

CLTV sets how much you can borrow

The limit on a second is combined loan-to-value (CLTV): every lien on the property, including the new one, divided by the property's value. Fannie Mae's Selling Guide says a lender must count all subordinate liens secured by the property when it calculates CLTV (B2-1.2-04, accessed 2026-10-06). Read the full walkthrough in CLTV explained.

An example, not a quote. A rental worth $400,000, with an 80% CLTV limit: $400,000 x 80% = $320,000 total debt allowed. Subtract a $180,000 first mortgage and the most a second can be is $140,000. Run your own numbers in the second mortgage calculator.

Typical terms, subject to underwriting

• Loan amount: $50,000 to $1,000,000.
• Structure: a lump-sum (closed-end) second or a line of credit (HELOC).
• Rate: fixed, from 6.99%.
• Lien position: first or second lien, including a first lien on a rental you own free and clear.
• Minimum FICO: 660.
• Combined loan-to-value: up to 80% CLTV on investment properties.
• Prepayment penalty: 0 to 5 years.
• Qualification: minimum 1.00 debt service coverage (DSCR).
• Property: 1 to 4 unit residential investment property, non-owner-occupied only, worth at least $100,000. Short-term rentals qualify.
• Borrower: an individual or an entity, such as an LLC.
• Closing: 3 to 4 weeks.

These are typical terms, and every loan is subject to underwriting. Every loan is conditional on the borrower and the property, and some files may be placed with partner lenders. If the room left under the CLTV cap is smaller than the minimum loan, the deal does not fit.

Business purpose only

This loan is for investment property you do not live in, and the money has to go to a business purpose. Federal rules treat credit to buy, improve or maintain a rental you do not occupy as business purpose, as long as you do not expect to stay there more than 14 days in the coming year (CFPB, Regulation Z, 12 CFR 1026.3, comment 3(a)-4, accessed 2026-10-06). Other uses of the cash have to stand on their own business purpose. That is why we do not offer this on a primary residence or second home. The glossary defines a business-purpose loan and non-owner-occupied property.

Spending the cash on personal items can undercut the business purpose of the loan, so plan on stating what the money is for. Common uses are property improvements, paying off debt on the investment, or putting a down payment on the next deal. Interest treatment depends on how the money is used, so read whether second mortgage interest on a rental is tax deductible and ask your tax professional.

Two things to check before you apply

Your first mortgage may need to allow it. The standard 1-4 Family Rider, which Fannie Mae requires on one- to four-unit investment loans (B8-4-01, accessed 2026-10-06) and which some other lenders also use, and whose text (Form 3170) bars any lien inferior to the mortgage from being perfected against the property without the lender's prior written permission. Garn-St Germain's implementing rule limits its junior-lien protection to loans on a home the borrower occupies or will occupy (12 CFR 191.5(b), accessed 2026-10-06). Read your first mortgage documents, and ask your first lender, before you assume you are clear. Putting a second lien behind a DSCR or conventional first walks through the clauses. If your first is a DSCR loan, see second mortgage on a DSCR rental.

Refinancing the first later usually takes a second signature. A new first mortgage records after your existing second. To keep the order the same, the second-lien holder generally has to sign a resubordination agreement. Plan for that if you expect to refinance the first. Compare the two paths in second mortgage vs cash-out refinance, and weigh the trade-offs in the pros and cons of a second mortgage on a rental.

Texas: homestead is a question of fact

Texas limits the liens a homestead can carry to the list in Article XVI, section 50 of the state constitution, and section 50(c) makes a lien outside that list invalid. A rental that is not your homestead is outside that list. Whether a property is your homestead depends on how you use it and what you intend, not on what a form says. Title companies can treat a borrower's only Texas house as a homestead by default, so expect occupancy to be checked, not assumed (sources and the full list of limits are in the Texas rental guide). This is general information, not legal advice. Talk to a Texas real estate attorney about your own property.

Business-purpose lending only, on non-owner-occupied investment property. Not a commitment to lend. Terms shown are typical and subject to underwriting.