Tri-state real estate bookkeeping means keeping one set of books that can answer to three state tax departments at once. If you own rentals in New York, New Jersey and Connecticut, each property's income is taxed by the state where it sits and again by your home state. Every purchase or sale also triggers a separate transfer tax with its own payer and form.
Good tri-state real estate bookkeeping tracks every transaction and closing cost by property and by state, so the nonresident returns and resident credits come straight out of the ledger. This guide covers the filing rules and transfer tax figures published by the three states, with a worked example and a month-by-month routine you can follow.
All three states tax nonresidents on income from property located inside their borders. The New York State Department of Taxation and Finance says that as a nonresident, "you only pay tax on New York source income, which includes earnings from work performed in New York State, and income from real property located in the state" (NY Tax Department nonresident FAQs). Connecticut uses similar wording: nonresident income is Connecticut sourced when it is "attributable to ownership or disposition of real or tangible personal property within Connecticut including but not limited to the income from the rental or sale of the property" (CT DRS nonresident guidance).
Your state of residence, meanwhile, taxes your income from everywhere. The result is that rent from a Hoboken condo owned by a Manhattan resident shows up on a New Jersey nonresident return and again on the New York resident return, with a credit on the New York side to prevent double tax. For the bookkeeping, this means every rent receipt and every expense has to carry a state tag from the day it is posted.
For the federal side of the same income, the IRS Schedule E guide to reporting rental income and loss explains how property-level results roll up. The state returns start from those same property-level numbers, which is why a combined "all rentals" ledger causes so much rework at filing time.
Each state has its own nonresident form and its own filing test.
| State | Nonresident form | When a nonresident with rental property files |
|---|---|---|
| New York | IT-203 | When you have New York source income, which includes income from real property in the state, and your New York adjusted gross income (federal amount column) is more than your New York standard deduction |
| New Jersey | NJ-1040NR | When gross income from everywhere exceeds $10,000 (single or married filing separately) or $20,000 (joint, head of household, qualifying widow(er)) |
| Connecticut | CT-1040NR/PY | When you have Connecticut sourced income and meet the gross income test, for 2025 more than $15,000 single, $12,000 married filing separately, $19,000 head of household, $24,000 joint |
The New Jersey threshold is measured on income "from everywhere for the entire year," according to the NJ Division of Taxation's nonresident guidance, so a New York resident with a salary and one modest New Jersey rental will usually cross it. Connecticut counts "Gross rental income" in its gross income test, which means the test uses rent before expenses.
Connecticut also computes a nonresident's tax "based upon the greater of your Connecticut adjusted gross income or your total income from Connecticut sources," then prorates it by the Connecticut share of income. For bookkeeping, that means the Connecticut return needs your full federal picture as well as the Stamford or Greenwich property results.
The real estate investor bookkeeping checklist walks through the property-level setup in more detail. If your properties sit inside LLCs, the single member LLC for rental property guide explains how a disregarded entity still reports through your personal return.
Double taxation is relieved by your home state, through a resident credit.
New Jersey residents claim the credit on Schedule NJ-COJ. The Division of Taxation says you may qualify "if you paid income or wage tax on the same income in the same year to both New Jersey and to another jurisdiction outside New Jersey," and that "your credit cannot be more than the amount you would have paid if you earned the income in New Jersey" (NJ credit for taxes paid to other jurisdictions). A separate Schedule NJ-COJ may be needed for each jurisdiction.
New York residents use Form IT-112-R, New York State Resident Credit. The Tax Department's credit page says you can claim it if you were a full-year or part-year New York resident and "had income sourced to and taxed by another state."
Two practical points follow for the books. First, the credit is capped at your home state's tax on that same income, so the home-state preparer needs the other state's net rental income per property, as well as the tax paid. Second, the credit depends on the nonresident return being filed and the tax being paid, so the nonresident returns in practice come first in the filing sequence. A more detailed treatment of filing order, allocation and credits sits in the guide to multi-state rental income taxation.
If you hold the portfolio in a partnership or multi-member LLC, an elective entity-level tax may change how the state credit works. The explainer on how the pass-through entity tax turns state tax into a federal deduction covers the general mechanics; the state-specific election rules should be checked with your preparer each year.
Transfer taxes hit at closing. The figures belong in your acquisition and disposition entries and stay out of operating expenses.
New York State charges a transfer tax "at a rate of two dollars for each $500, or fractional part thereof, of consideration," which works out to 0.4%. On top of that, "an additional tax (mansion tax) of 1% of the sale price applies to residences where consideration is $1 million or more" (NY real estate transfer tax). The base tax is paid by the seller, and "the additional tax (mansion tax) and supplemental tax are paid by the buyer." Conveyances outside New York City are reported on Form TP-584; New York City conveyances use Form TP-584-NYC.
For New York City property, the state adds further layers on large deals: an additional base tax on residential conveyances of $3 million or more and on other property of $2 million or more, plus a supplemental tax on residential conveyances of $2 million or more at "an incremental rate between .25% and 2.9% based on the purchase price."
New York City charges its own RPT on top of the state tax. For one- to three-family houses, condo units and co-op apartments, "if the value is $500,000 or less, the rate is 1% of the price. If the value is more than $500,000 the rate is 1.425%." For all other transfers, the rates are 1.425% at $500,000 or less and 2.625% above that (NYC Department of Finance RPT page). The city notes that the tax "is usually paid as part of closing costs," so the purchase contract and closing statement are the documents that show which party paid it.
New Jersey's Realty Transfer Fee is imposed "on the seller of real property for recording a deed for the sale." For consideration above $350,000, the standard rates run from $2.90 per $500 on the first $150,000 up to $6.05 per $500 on consideration above $1,000,000.
The old buyer-paid 1% mansion tax has been replaced. For deeds submitted for recording on or after July 10, 2025, New Jersey imposes a Graduated Percent Fee on deeds above $1,000,000, and "the seller is statutorily responsible for the RTF and the Graduated Percent Fee" (NJ Division of Taxation, Realty Transfer Fee). The fee is a flat percentage of total consideration: 1% above $1 million up to $2 million, 2% up to $2.5 million, 2.5% up to $3 million, 3% up to $3.5 million and 3.5% above $3.5 million. It applies to Class 2 residential property, Class 4A commercial property (other than industrial or apartment), Class 4C cooperative units and certain farm property with a residence.
In Connecticut, the grantor or the grantor's attorney files Form OP-236 to report a transfer of Connecticut real property, and tax is due when consideration is $2,000 or more unless an exemption applies. Confirm the current state and municipal rates in the OP-236 instructions before closing.
Assume an investor sells a Hoboken condo for $2,750,000 and, in the same year, buys a Manhattan condo for $1,200,000 to rent out. Neither transaction qualifies for an exemption. An individual condo unit falls within New York's definition of residential real property for the mansion tax, so the Manhattan purchase is subject to it.
| Item | Rate used | Amount | Paid by |
|---|---|---|---|
| NJ Realty Transfer Fee on $2,750,000 | Tiered rates per $500 | $30,750 | Seller |
| NJ Graduated Percent Fee on $2,750,000 | 2.5% of total consideration | $68,750 | Seller |
| NY State transfer tax on $1,200,000 | $2 per $500 | $4,800 | Seller (the other party) |
| NY mansion tax on $1,200,000 | 1% | $12,000 | Buyer |
| NYC RPT on $1,200,000 (residential, over $500,000) | 1.425% | $17,100 | Per contract and closing statement |
The New Jersey fee breaks down as $870 on the first $150,000, $425 on the next $50,000, $3,360 on $200,000 to $550,000, $3,180 on $550,000 to $850,000, $1,740 on $850,000 to $1,000,000 and $21,175 on the remaining $1,750,000. Added to the $68,750 Graduated Percent Fee, the seller's New Jersey transfer charges total $99,500. The $68,750 figure matches the example New Jersey published in its July 2, 2025 notice for a $2.75 million deed.
On the New York purchase, the investor as buyer pays the $12,000 mansion tax. IRS Publication 551 lists "Transfer taxes" among the settlement costs included in the basis of purchased property, so this amount belongs in the property's cost on the fixed asset register and is allocated between land and building along with the rest of the purchase price. The seller-side New Jersey charges belong in the sale workpapers that feed the federal gain calculation, covered in the guide to Form 4797 for the sale of rental property. Posting either amount to a "taxes" expense account overstates the year's deductions and misstates basis when the property is sold later.
If the sale is part of a like-kind exchange, the state treatment of the deferred gain adds another layer. The overview of state-specific 1031 exchange rules covers how states track gain that moves across borders.
A short, repeated routine keeps the year-end work small.
Every month: reconcile one bank account per property or per entity, tag every transaction with property and state, and attach leases, invoices and closing statements to the entry.
Every quarter: review the year-to-date net income by state, since that figure shows whether estimated payments are needed in a state where you are a nonresident. Recheck any shared-cost allocations.
At each purchase or sale: book the full closing statement, separating transfer taxes, title charges, loan costs and prorations. Loan costs follow different rules from transfer taxes, so they need their own accounts.
At year end: produce a property-level profit and loss statement, a state summary of net rental income, a fixed asset roll-forward and a list of transfer taxes paid during the year with the party that paid each one.
New York owners will also want the property-level expense detail to support the items in New York landlord tax deductions, since the deduction review and the nonresident allocation draw on the same records.
Do I file a New Jersey return if I only own a rental there and live in New York? If your gross income from everywhere for the year is above $10,000 (single or married filing separately) or $20,000 (joint, head of household, qualifying widow(er)), New Jersey requires a nonresident return, Form NJ-1040NR. You then claim a credit on your New York resident return for the New Jersey tax paid on that income.
Who pays the New Jersey mansion tax in 2026? The seller. For deeds recorded on or after July 10, 2025, the old 1% buyer-paid fee became a Graduated Percent Fee from 1% to 3.5% of total consideration on transfers above $1 million, and the seller is statutorily responsible for it.
Does the New York mansion tax apply to investment condos? Generally yes. The New York State Tax Department's mansion tax bulletin defines residential real property as premises that "are or may be used in whole or in part as a personal residence at the time of conveyance," and the definition expressly includes an individual condominium unit. The buyer's plan to rent the unit out does not change that, so a condo bought for $1 million or more usually carries the 1% tax, paid by the buyer.
Is New York City RPT in addition to the state transfer tax? Yes. New York City property is subject to both the state real estate transfer tax and the city RPT, and New York City residential deals of $2 million or more can also carry the state's supplemental tax.
Can one bookkeeper handle properties in all three states? Yes. The work depends on a chart of accounts and fixed asset register organized by property and state, which any bookkeeper can maintain once the structure is set up correctly.
Madras Accountancy provides bookkeeping, tax preparation support and CFO support for real estate investors and the CPA firms that serve them, including property-level ledgers, closing statement entries and state workpapers for owners with rentals in more than one state. For firms that want to hand off this work, the overview of outsourced bookkeeping for real estate investment firms explains the usual setup. To talk through your portfolio, contact our team.
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