Texas HELOC Rules for a Lock-in Homeowner With a Low First Mortgage

The Quick Read: A Texas homeowner can keep a cheap first mortgage and add a home equity line behind it, but only inside the state’s constitutional limits. The combined balance of all liens on a primary residence cannot pass 80% of the home’s value, and the line is a homestead product only. Rentals and second homes follow different rules.

• Combined liens on a Texas primary residence cap at 80% of fair market value.
• The first mortgage counts against that cap, so it is never new borrowing room.
• Only one home equity loan of this kind can be secured by the homestead at a time.
• A 12-day wait before closing and a 3-day cancellation window after closing both apply.
• Rentals and second homes sit outside these homestead rules.

Why This Rule Set Matters to Someone Holding a Cheap First Mortgage

Owners with a low-rate first mortgage do not want to refinance the first lien. A second lien lets them reach equity and leave the first loan alone.

Texas adds a wrinkle. Home equity lending is written into the state constitution, not left to lender policy. The Texas A&M Real Estate Research Center explains that these loans fall under Article XVI, Section 50, and that the Finance Commission of Texas interprets the provisions. Lenders can be stricter than the constitution. They cannot be looser.

For a lock-in owner, that makes the rule set a sizing tool. Learn the cap, the timing, and the property limits before applying. Surprises on these files usually trace to one of those three.

How the 80% Combined Cap Actually Works

The cap counts every lien. Take 80% of fair market value, subtract the first mortgage balance and any other liens, and what remains is the most the line can be. A low-rate first mortgage uses up part of the cap whether or not the rate is cheap.

Run it on a home valued at $400,000 with a $200,000 first mortgage (a modeled assumption). Eighty percent of value is $320,000. Subtract the first lien and the ceiling on a new line is $120,000. The program may set a smaller number, but it cannot set a larger one.

Now take an owner who bought recently with a small down payment. The first mortgage might already sit close to 80% of value. There is little or no room, however attractive the first loan’s terms are. Those owners are better off waiting for amortization or appreciation.

Across Lendmire’s wholesale network, the program matrix layers on top of the state cap. On a primary residence, leverage tiers rise with credit score, and the top tiers go well past 80%. A Texas primary never uses them. The 80% state cap governs, and the calculator on the page carries the same cap. Credit tiers still matter for eligibility and for lines in the lower leverage bands, where 70% to 80% CLTV is the working range on a primary at 620 to 640 scores. Treat all of this as guidance, subject to lender guidelines and full file review.

Does the Low First Mortgage Block a Line?

Usually not. A line can sit in second position behind the existing first lien, and the network’s standalone line is available in first or second lien position. The first mortgage does not need to be touched, paid off, or re-underwritten.

Three things can get in the way:

• An existing home equity lien of the same constitutional type. Texas permits one such loan against the homestead at a time. The one-loan rule is among the protections that attach. A prior equity loan or line must be resolved first.
• Too little room under the cap. Covered above.
• Seasoning. A 12-month seasoning requirement applies to Texas primary residences in this network, alongside the 12-day wait and the one-lien rule. Confirm the history of the first lien and any recent cash-out before applying.

Pull the closing documents from the first mortgage and check whether it was a purchase loan, a no-cash-out refinance, or an equity-type loan. Title work will show it. Owners who skip this step find the problem during review, not before.

The Step-by-Step Timeline

The process has mandatory waiting periods, so cash is never available the same week. The sequence runs like this.

1. Compute capacity. Value times 80%, minus all existing liens. The State Bar of Texas gives a worked version of this arithmetic.

2. Apply and receive the statutory notice. The lender delivers a separate notice about home equity credit. Closing cannot happen before the 12th day after the later of application or notice delivery.

3. Sign the fair-market-value acknowledgment. The borrower acknowledges the value, and the lender may rely on it where it matches an appraisal or evaluation. Lines at or below $500,000 ordinarily run an automated valuation, though a borrower may request a full appraisal. Every line above $500,000 needs one.

4. Close at an authorized location. Both spouses sign, even if only one is on title, according to the State Bar of Texas page.

5. Wait out the cancellation window. The owner or spouse can cancel without penalty during the rescission period after closing, so funds are not released until it ends; timing varies by file and lender.

6. Draw. At least 75% of the line is drawn at closing in this network, and later draws carry a $4,000 minimum in Texas.

HELOC or Cash-Out Refinance?

The choice comes down to whether the cheap first mortgage survives. A comparison for this borrower:

Two points sit under that table. First, a Texas homestead cash-out refinance is itself a constitutional equity loan with the same caps, so it does not escape the rules. Second, the line in this network floats across both the draw and repayment periods and never converts to fixed. An owner who wants a fixed payment on the new money should weigh that before choosing a line.

The structure is a 3-year interest-only draw with a 17-year amortizing repayment, or a 5-year draw with a 25-year repayment. Qualification runs on the interest-only payment calculated on the maximum draw, with DTI at 50% maximum. A payment that looks small during the draw steps up when amortization starts. Stress that step before committing.

Where the General Rule Breaks

Rentals and second homes. These are outside the homestead rules. The Texas A&M center notes that homestead equity loans cannot be taken against second homes or rental property. In this network, Texas second homes and investment properties are eligible as non-homestead transactions. They follow their own tables: a second home reaches 90% CLTV only at a 720-or-better score, and an investment line tops out at 70% CLTV with a 700 minimum.

The owner who moved out. Say an owner relocated and kept the old home as a rental. The homestead line is gone. That owner can look at an investment line, or at a DSCR cash-out refinance of the rental, which qualifies primarily on property-level rental income covering the payment, subject to lender guidelines. Coverage of 1.00 is where select programs start. Leverage and terms vary. Lendmire’s complete DSCR loans guide covers that path.

A prior equity lien. If the home already carries one, a second line cannot sit behind it. The state’s strict reading of what a homestead lien may secure is reflected in Texas Attorney General opinion JC-0357.

Title and vesting. The line requires title held by an individual or a revocable living trust. An LLC cannot hold it. A home already deeded into an LLC needs a vesting change first, or a DSCR cash-out instead.

Property limits. Texas properties are limited to 10 acres. A property listed for sale, or listed within the past 60 days, is ineligible in Texas. Manufactured homes, co-ops, condotels, log homes, and agricultural or mixed-use zoning are not eligible.

Using Homestead Equity to Fund a Rental Purchase

A common lock-in play is borrowing against the primary home for the down payment on a rental. It works mechanically. It also stacks a variable payment on top of the new rental’s own debt, and DTI at 50% maximum counts both.

Two funding paths exist. One is the homestead line against the primary residence. The other is a DSCR purchase loan on the rental itself, where most files land at 75% to 80% LTV and a score around 660 or higher is typical. The strongest files clear both tests: enough equity and enough rental coverage. A DSCR ratio compares rent to the full housing payment only. Clearing 1.00 is not the same as positive cash flow, because repairs, vacancy, management, and capex sit outside the calculation.

Key Terms Defined

Homestead: the owner’s primary residence, which Texas protects with special lien rules.

Combined loan-to-value (CLTV): all liens on the property divided by its value.

Fair market value acknowledgment: a signed statement of the home’s value that sets the cap math.

Rescission window: the short period after closing when an owner can cancel without penalty; the exact timing depends on the loan type and the specific file.

Draw period: the stretch when the line allows borrowing and payments are interest-only.

Lock-in: an owner’s reluctance to give up a low first-mortgage rate.

Common Misconceptions

• The 80% is new room. It is not. The first mortgage counts against it.
• Advances stop at 50% of value. That older threshold was removed by a 2017 constitutional amendment, according to a law-firm summary of S.J.R. 60. The OCCC notice now uses 80%. Some bank pages still repeat the old figure.
• The waiting period runs after closing. It runs before closing, and the timing varies by file and lender.
• The rules reach rentals. They bind the homestead only.
• A line avoids the constitutional rules. In Texas a homestead line is itself a constitutional equity loan.

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. 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.

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.

Investors who want the broader program framework can review how DSCR loans work.

References

1. Texas A&M Real Estate Research Center

2. State Bar of Texas client page

3. Texas Attorney General opinion JC-0357

4. S.J.R. 60 handout