The Quick Read: A home equity line recorded against a Miami-Dade rental pays the same statewide mortgage taxes as any Florida lien, and the county’s 45-cent surtax is not among them. The surtax is a deed-transfer charge, and a line of credit transfers no deed. The two taxes that do apply are documentary stamp tax on the mortgage and the nonrecurring intangible tax. Both are measured on the credit limit, not on what you draw.
- The surtax is listed under “Deed” in the Clerk’s recording instructions, not under “Mortgage.”
- Mortgage doc stamps run 35 cents per $100 of the secured amount, and the intangible tax is 2 mills.
- Together that is about 0.55% of the taxed amount, owed on the full limit even if you never draw.
- The $2,450 cap on doc stamps protects unsecured notes, not a recorded mortgage.
- On our network, an investment-property line tops out at 70% CLTV and $500,000, so the tax base has a hard ceiling.
Plenty of Miami-Dade investors budget for the wrong tax. They see the county’s higher deed rate in a purchase guide and assume it follows them into a refinance or equity line. It doesn’t. This article walks through what the taxes are, how the base is set, where the general rule bends, and how to size a line with the day-one cost in mind. For the wider financing picture, Lendmire’s complete DSCR loans guide covers the investor-loan side.
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.
Key Terms Defined
Documentary stamp tax (doc stamps): A Florida tax on documents that create or transfer debt or property, collected when the document is recorded.
Surtax: An extra county charge. In Miami-Dade it adds 45 cents per $100 on deeds for property other than a single-family home.
Nonrecurring intangible tax: A one-time Florida tax of 2 mills, or 0.2%, on debt secured by a lien on Florida real property.
Secured line: A line of credit backed by a recorded mortgage on the property.
Draw: Money you actually take out of the line. The credit limit is the most you may draw.
Consideration: The dollar amount a deed’s tax is measured on, usually the price paid.
CLTV: Combined loan-to-value, meaning all liens on the property added together and divided by its value.
Does the Miami-Dade Surtax Apply to a Rental HELOC?
No. The surtax attaches to a deed, and a HELOC records a mortgage. The Florida Department of Revenue states Miami-Dade’s deed rate as 60 cents per $100 with a separate 45-cent surtax. It also says the surtax is not due on a document that transfers only a single-family dwelling.
The Miami-Dade Clerk’s recording instructions are even more useful here. They list the surtax under “Deed,” required on transfers of real property other than a single-family residence. Under “Mortgage,” they list only two taxes: doc stamps at 35 cents per $100 of the note amount and intangible tax at 2 mills. No surtax appears.
The logic is simple. The surtax is triggered by transferring an interest in real property. A lien that secures a line of credit transfers nothing. You still own the building the day after you record.
Be careful with web pages that say the surtax applies to “all documents.” That wording conflicts with the agency’s own text. Go with the Department of Revenue and the Clerk.
Taxes at a Glance
| Tax | Triggered by | Rate | On a rental HELOC? |
|---|---|---|---|
| Deed doc stamps, single-family | Deed transfer | $0.60 per $100 | No deed, so no |
| Deed doc stamps plus surtax | Deed, non-single-family | $0.60 plus $0.45 per $100 | No deed, so no |
| Mortgage doc stamps | Recorded mortgage | $0.35 per $100 | Yes |
| Nonrecurring intangible tax | Lien on Florida real property | 2 mills | Yes |
The two deed rows are there for contrast. They are the numbers you will see in purchase-closing guides, and they are the ones that do not transfer to an equity line.
What You Actually Owe: The Two Taxes
Doc stamps on the mortgage are 35 cents per $100, or any fraction of $100, of the indebtedness the mortgage secures. The Department’s documentary stamp tax form says the base counts even if the debt is contingent. A line you have not drawn is contingent. It is still taxed.
The intangible tax is 2 mills on each dollar of the secured obligation. Per the Department’s nonrecurring intangible tax page, a line of credit is taxed to the extent a Florida mortgage secures it. Once tax is paid on the full line, no further tax is due.
The Department’s own example shows the arithmetic: an obligation of $151,250 secured by Florida property worth $200,000 produces $151,250 × 0.002 = $302.50.
Rounding differs between the two. Doc stamps round up to the next $100. The intangible tax is a straight 0.002 multiplier with no rounding step.
Add the two rates and you get about 0.55% of the taxed amount. That is a rule of thumb, and it is the easiest way to scale the cost to any limit without a dollar figure.
Line Size Versus Draw: Why the Limit Is the Bill
You pay on the ceiling, not the balance. The Florida Senate’s Chapter 199 text says that for a line of credit, the tax is paid on the maximum amount of the line and no further tax is due on borrowing under it. The Department’s page says the same thing in current form.
Two practical consequences follow.
First, the tax is a sunk day-one cost. If you open a large line and never use it, the tax is not refunded. Size the line to a planned use, such as a renovation budget or a down payment on the next rental, rather than the maximum you can get.
Second, later draws up to the ceiling add no intangible tax. You pay once and then borrow freely within the limit. That makes a modest line you will actually use look better than a large line you will not.
Older material muddies this. A 1992 Department advisement and the general future-advance language in the statute describe tax paid on each advance. The line-of-credit provision and the Department’s current page say otherwise. Rely on the current page, and have a Florida title attorney confirm how your mortgage is drafted.
The Cap Trap: Notes Versus Mortgages
Many investors have heard that Florida doc stamps stop at $2,450. That is true for unsecured notes. It does not apply to a mortgage recorded in Florida.
Rule 12B-4.051 of the Florida Administrative Code says a recorded mortgage is taxed on the full amount of the obligation it secures. The rule’s own example is a $1,000,000 obligation secured by a mortgage recorded the same day, which produced $3,500 of tax on the mortgage.
For a HELOC secured by a rental, this means no ceiling softens the bill. Doc stamps scale straight with the limit.
How Underwriting Treats a Rental HELOC
Here is where the program side matters, because it sets the size of your tax base. Across our wholesale network, a home equity line is a different product from a DSCR loan. A DSCR loan is reviewed primarily on property-level rental income covering the payment, subject to lender guidelines. A HELOC is reviewed on your credit, your equity, and your debt-to-income ratio.
For an investment property, the network’s limits are tight and specific:
- Leverage: 70% CLTV is the ceiling on an investment line, at both the 700 and 720-plus credit tiers. Credit above 700 buys eligibility, not extra leverage.
- Credit: 700 is the floor for investment lines. There is no tier beneath it.
- Line size: An investment line caps at $500,000. There is no higher investment tier.
- Structure: A standalone line in first or second lien position, with a 5-year draw period followed by a 25-year repayment period. At least 75% of the line is drawn at closing.
- DTI: 50% maximum, qualified on the interest-only payment calculated on the maximum draw.
- Valuation: At or below $500,000, lines ordinarily use an automated valuation, so a traditional appraisal is commonly not needed.
- Property types: Single-family, 2-4 units, PUD, townhome and condominium, including non-warrantable condos. Manufactured homes, co-ops, condotels, log homes, commercial, mixed-use and agricultural zoning are not eligible.
- Title: The borrower or a revocable living trust must hold title. LLCs and corporations cannot.
- Availability: Lendmire brokers HELOCs in 16 full-service states, Florida among them. That is narrower than its 41-market DSCR footprint.
All of this is subject to lender guidelines and full file review. A pattern we see often: the borrower focuses on rate and forgets that the 70% ceiling and the $500,000 cap define how much tax could ever be owed. At the cap, the combined 0.55% rule of thumb is the most the two taxes can take of an investment line.
Note the sharp edge on title. If the rental already sits in an LLC, a HELOC does not fit as-is. You would need a vesting change or a DSCR cash-out refinance instead. And a vesting change in Florida is itself a recorded transfer, which brings us to the edge cases.
Where the General Rule Breaks
The headline answer holds for a pure lien. Several situations change it.
A deed is recorded alongside the mortgage. If you buy a property, move title into a trust, or deed it between spouses at the same time as the lien, the deed carries its own tax. In Miami-Dade, a deed on non-single-family property adds the surtax. Single-family, 2-4 unit, condo and land classification matters here, and only here.
Moving a rental into an LLC. A practice note from one Florida attorney’s site says transfers into a wholly owned entity are exempt only if no mortgage is outstanding, and that doc stamps may be owed on the unpaid mortgage balance when one exists. Treat that as secondary guidance, since the page is dated. A HELOC recorded first can turn a title move into a taxable event. Because the network’s HELOC programs cannot lend to an LLC owner, many investors who plan an entity move sequence it before choosing a product. A Florida title attorney should confirm the order.
Collateral partly outside Florida. Section 199.133 applies the intangible tax to the share of the obligation that matches the Florida share of the collateral’s value. The base is apportioned.
The value cap. The intangible base cannot exceed the value of the Florida property. The Department’s example uses a $150,000 property against a $151,250 obligation, producing $300 instead of $302.50. At 70% CLTV this rarely bites, but it exists.
Late recording. If the mortgage is not recorded promptly, the intangible tax goes straight to the Department and can become delinquent.
Out-of-state signing. A note signed elsewhere and brought into Florida can still be taxable, and a recorded Florida mortgage is taxed regardless.
Limit increases. How a later increase or modification of an existing loan is taxed is not settled here, so do not assume it is free. Ask the title agent before you proceed.
Who Pays and Where It Shows Up
The Department says the lender is the intangible-tax payer but may pass the cost to the borrower. Doc stamps are a liability of all parties to the document. In practice, the borrower usually pays both at closing. That is common practice rather than a rule, so confirm it before signing.
The closing or title agent pays the Clerk when the mortgage is recorded. The Clerk requires an original, signed and notarized mortgage, with a copy of the note attached or the note amount written on the face of the mortgage. These are state taxes collected through the county, not lender fees, though both can appear as line items on the closing paperwork.
What Purchase Guides Get Wrong for This Loan
Most Miami-Dade tax content is written for buyers. Three pieces of that advice do not transfer:
- The 1.05%-per-$100 deed figure. That is the 60-cent deed rate plus the 45-cent surtax, and it applies to deeds on non-single-family property. Budgeting it for a HELOC overstates the cost.
- Seller-pays customs. Who pays deed stamps on a sale has no bearing on an equity line. There is no seller.
- Property type as a tax driver. Single-family versus condo versus duplex decides the surtax on a deed. On a pure lien it decides nothing about tax, though it still decides eligibility.
A Worked Comparison: Reading the Math Without Dollars
Take an investor with a Miami-Dade rental and a planned renovation budget. She is deciding between a modest line sized to the project and a line sized to the maximum the equity allows.
Both lines carry the same rate structure: 0.35% doc stamps plus 0.20% intangible tax. The larger line simply multiplies the base. Double the limit and the day-one tax doubles. Since the tax applies to the ceiling and not the balance, the extra size buys access she may never use, and she pays for it up front.
Now compare a HELOC with a cash-out refinance. A refinance creates a new note and mortgage, so the same two taxes apply to the new loan amount. A HELOC taxes the ceiling. The honest comparison is the tax on the full ceiling against the tax on the new loan balance, plus the other differences in qualification. A DSCR cash-out refinance qualifies primarily on property-level rental income, with leverage typically topping out around 75% LTV across most of the network and about six months of seasoning commonly expected. A HELOC runs on credit, equity and DTI.
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.
Ways to Manage the Day-One Cost
You cannot negotiate the statutory rate. You can control the base.
- Size the line to a plan. Pick the amount tied to a specific use, since unused limit still carries tax.
- Check the future-advance drafting. Ask the title attorney how the mortgage states the secured amount.
- Settle title first. If an LLC or trust move is coming, decide the sequence before the lien is recorded.
- Record on time. Late recording shifts the intangible tax to the Department and makes it delinquent after 30 days.
- Compare against the alternative. If you want a larger sum than a $500,000 investment line allows, a cash-out refinance may suit better, taxed on the new loan balance.
For borrowers whose collateral or plans cross state lines, Lendmire’s piece How Much Florida Doc Stamps Add to an Out-of-State Rental HELOC covers that variation.
Common Mistakes
1. Applying the surtax to the lien. It belongs to deeds.
2. Counting on the $2,450 cap. It protects notes, not recorded mortgages.
3. Assuming you pay only on draws. The base is the limit.
4. Treating single-family status as a doc stamp exemption. It exempts only the surtax on deeds.
5. Expecting later draws to cost more. After tax is paid on the full line, borrowing up to the ceiling adds no intangible tax.
6. Reading a DSCR ratio as cash flow. A DSCR compares rent to PITIA only; repairs, vacancy and management sit outside it, and a HELOC does not use it anyway.
Frequently Asked Questions
Does Miami-Dade charge its surtax on a HELOC recorded against a duplex?
No. Property type matters for the surtax only on a deed. A duplex HELOC pays mortgage doc stamps at 35 cents per $100 and the 2-mill intangible tax, the same as a single-family rental. The surtax would appear only if a deed were recorded in the same transaction.
Do I pay tax on the amount I draw or the full limit?
The full limit. Doc stamps apply to the indebtedness secured, even if contingent, and the intangible tax applies to the maximum amount of the line. Once paid, later draws up to the limit add no intangible tax.
Is there a cap on doc stamps for a large line?
Not on a recorded mortgage. The $2,450 cap applies to unsecured notes. A mortgage is taxed on the full secured obligation, so the tax scales with the credit limit.
Who is responsible for paying the intangible tax?
The lender is the taxpayer, but it may pass the cost to the borrower. Borrowers commonly pay it at closing, though that is practice and not a rule.
How large can an investment-property line be in this network?
Up to $500,000, at a ceiling of 70% CLTV with a 700 minimum credit profile, subject to lender guidelines and full file review. Lines above $500,000 are available on primary residences only.
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.
About Lendmire
As a mortgage broker (NMLS# 2371349), Lendmire helps homeowners and real estate investors in its 16 full-service states open home equity lines of credit arranged through wholesale lenders. Lendmire is never the lender; line amounts, ceilings and terms are set by the lender under its guidelines. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.
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References
1. Florida Department of Revenue – Documentary Stamp Tax
2. Miami-Dade Clerk – Official Records
3. Florida Department of Revenue – Form GT-800014
4. Florida Department of Revenue – Nonrecurring Intangible Tax
5. Chapter 199, Florida Statutes
6. Florida Administrative Code Rule 12B-4.051
This article is part of Lendmire’s investment property HELOC program — full qualification details, guidelines, and scenarios live on the program page.
Related reading: Cash-Out Refinance Title Requirements on an Inherited Tenanted Rental · Probate and Title Requirements for an LLC-Held Inherited Rental Refinance · How to Stress-Test DSCR on a Short-Term Rental Cash-Out Refinance
Guides: Investment Property HELOC in Miami, FL · Investment Property HELOC in Florida
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
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Compliance and disclosures. Lendmire (NMLS# 2371349) is a licensed mortgage broker and is not a direct lender, depository institution, financial advisor, or tax professional. Content in this article is general market analysis and educational information — not financial, legal, or tax advice for any specific situation. Lendmire does not guarantee loan approval; every transaction is subject to underwriting by the funding lender. Mortgage pricing and loan program guidelines are subject to change at any time without notice and vary by borrower characteristics, property type, and state regulations. Lendmire complies with Equal Housing Opportunity. Licensure verification: NMLS Consumer Access.