Form OP-236: Connecticut's Real Estate Conveyance Tax Return Explained

Out-of-state investors selling Connecticut property are often blindsided at the closing table. The closing attorney — acting as a state-authorized withholding agent — deducts 6.99% of your net proceeds and remits it directly to the Connecticut Department of Revenue Services before you receive a single dollar. This mandatory withholding mechanism is tied directly to Form OP-236, the Connecticut Real Estate Conveyance Tax Return.

Understanding Form OP-236 before you sell is not optional. For non-residents, it governs both how much gets withheld at closing and how you reclaim any overpayment after filing your annual tax return.

What Form OP-236 Is

Form OP-236 is the Connecticut Real Estate Conveyance Tax Return. It is filed at the time of property transfer — not at tax year end — and it serves two distinct functions:

1. It reports and pays the state and municipal conveyance tax owed by the seller at closing
2. It triggers the non-resident income tax withholding mechanism for sellers who do not reside in Connecticut

Every deed transfer of Connecticut real property requires the filing of Form OP-236. The closing attorney prepares the form, both parties (or their representatives) review it, and it is submitted to the town clerk along with the conveyance tax payment at the time of recording.

Who Must File

All sellers of Connecticut real property — resident and non-resident — are subject to Form OP-236 at closing. However, the implications differ significantly based on residency:

• Connecticut residents: File OP-236, pay the conveyance tax, proceed. The 6.99% non-resident withholding does not apply.
• Non-residents (individuals, partnerships, trusts): File OP-236 AND face mandatory income tax withholding equal to 6.99% of net proceeds at closing.

For multi-member LLCs or partnerships with both resident and non-resident members, the withholding requirements apply proportionally to the non-resident partners' share of the proceeds.

The Conveyance Tax Rates Reported on OP-236

Form OP-236 captures both components of Connecticut's bifurcated conveyance tax system:

State Conveyance Tax (tiered by property type and sale price):

Municipal Conveyance Tax:

• Standard towns: 0.25%
• Targeted Investment Communities (18 designated municipalities): 0.50%

The major investment cities — Bridgeport, Hartford, New Haven, Waterbury, Stamford, New London, Norwich, Norwalk — are all Targeted Investment Communities. Sellers in these cities pay double the base municipal rate.

Stamford uses a hybrid structure: 0.35% on the first $1,000,000 and 0.50% on any amount above that.

The Non-Resident Withholding Mechanism

For non-resident sellers, Form OP-236 is the document through which Connecticut collects an estimated income tax payment at closing. The closing attorney calculates 6.99% of the net proceeds — the sale price minus the outstanding mortgage balance and certain allowable costs — and withholds that amount directly from what you receive.

The 6.99% rate mirrors Connecticut's top marginal income tax bracket. The state does not attempt to calculate your actual marginal rate at closing; it withholds at the top rate and lets you reconcile later.

Example: Non-resident investor sells a $600,000 Connecticut duplex. Remaining mortgage: $200,000. Net proceeds: $400,000. Mandatory withholding: $400,000 × 6.99% = $27,960 withheld at closing and remitted to DRS.

After the close of the tax year, the investor files Form CT-1040NR/PY (Connecticut Nonresident and Part-Year Resident Income Tax Return) and calculates their actual Connecticut tax liability on the gain. If the actual liability is $18,000, they receive a refund of $9,960 from the state. If the actual liability exceeds what was withheld, they owe the balance.

Exemptions from the Non-Resident Withholding

Certain transactions qualify for a withholding exemption on OP-236, allowing the seller to avoid the upfront withholding. Qualifying exemptions include:

The principal residence exemption: If the property is the seller's principal residence and the gain qualifies for the federal Section 121 exclusion ($250,000 for singles, $500,000 for married filing jointly), no withholding applies. This exemption does not apply to investment properties.

The 1031 exchange exemption: A non-resident seller executing a valid 1031 like-kind exchange can claim an exemption from withholding by documenting that the sale proceeds are being routed to a Qualified Intermediary. The seller must provide the closing attorney with written certification of the exchange and the QI's name and contact information. The QI then holds the funds; the state does not withhold. This must be arranged before the closing — you cannot claim the 1031 exemption after proceeds have already been withheld.

The no-gain exemption: If the transaction produces no gain (e.g., a short sale at a loss), the seller may claim an exemption by providing documentation of the cost basis.

The insufficient proceeds exemption: If the net proceeds are zero or negative (e.g., proceeds consumed entirely by the mortgage payoff), no withholding applies.

Any exemption must be documented in writing and included with the OP-236 filing at closing. The closing attorney as withholding agent accepts the responsibility for proper application of exemptions — a misclaimed exemption creates liability for the attorney, not the state.

Filing the Form: Mechanics

Form OP-236 is prepared by the closing attorney and filed with the town clerk simultaneously with the deed recording. The conveyance tax payment accompanies the filing. The town clerk forwards the form and payment to the state.

The form itself captures:

• Grantor (seller) and grantee (buyer) names and addresses
• Property description and parcel identification
• Total purchase price (gross consideration)
• Property type classification (residential dwelling, multi-family, commercial)
• Applicable state and municipal conveyance tax rates and calculations
• Non-resident withholding amount (if applicable)
• Any claimed exemptions with supporting documentation

Sellers are not required to submit OP-236 independently — the closing attorney handles preparation and submission as a standard part of the Connecticut closing process. However, sellers should review the completed form before closing to verify:

• The correct property type classification (residential dwelling vs. multi-family — the distinction affects whether the escalating brackets or flat rate applies)
• The correct town designation (standard vs. Targeted Investment Community)
• The correct withholding exemption, if one applies

Errors in property classification can cost you. A multi-family building misclassified as a "residential dwelling" on a $900,000 sale would be taxed at 0.75% on $800,000 and 1.25% on $100,000 — rather than the correct flat 0.75% on the full $900,000. That misclassification increases your state conveyance tax by $1,250.

Planning Around OP-236 Before You Sell

For 1031 exchanges: Begin planning at least 90 days before your anticipated closing. The Qualified Intermediary agreement must be in place and documented before the closing attorney can process the OP-236 exemption. If you're also a foreign national, you must simultaneously navigate FIRPTA withholding (15% of gross sale price withheld by the buyer), which requires a separate IRS Withholding Certificate application that takes up to 90 days.

For large gains: If the 6.99% withholding significantly exceeds your anticipated Connecticut tax liability, discuss an estimated withholding certificate with your tax advisor. In some cases, DRS will issue guidance allowing a lower withholding rate where the seller can demonstrate that the full 6.99% substantially overstates the actual liability — though this process is rarely used for standard residential transactions.

For multi-member LLCs: Confirm with your closing attorney how the withholding is calculated and allocated among members before the closing. Disputes about withholding allocation create complications with year-end K-1 reporting.

The Connecticut Investment Property Guide covers the complete Connecticut closing process — from the mandatory attorney requirement and earnest money structure through Form OP-236, conveyance tax calculations, and non-resident withholding — for investors operating throughout the state.

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