Updated October 24, 2026. Quick answer: Lines 40a, 40b and 41 of the 2025 NJ-1040 work together. Line 40a records property taxes paid directly or through rent, line 40b records whether you were a homeowner or a tenant, and line 41 is the property tax deduction. The booklet lets you take either that deduction or a credit on line 56, and it has Worksheet H to compare the two.
What this line asks
The booklet introduces the whole group in one paragraph: “If property taxes were paid (directly or through rent) on your principal residence (main home)” the filer “may qualify for either a Property Tax Deduction that reduces your taxable income, or a refundable Property Tax Credit.”
Line 40a is headed with the phrase “Total Property Taxes (18% of Rent) Paid”, and line 41 is the deduction itself. The credit alternative is on NJ-1040 line 56.
Who it applies to
The booklet prints a list of eligibility requirements. They begin “You were domiciled and maintained a main home as a homeowner or tenant in New Jersey during 2025;” and continue “Your main home, whether owned or rented, was subject to property taxes that were paid either as actual property taxes or through rent;”
Two more requirements: “If you rented your main home in a building that had more than one dwelling unit, you had access to kitchen and bath facilities;” and “If your main home was a unit in a multi-unit property you owned, the property had no more than four units, and no more than one of those was a commercial unit;”
An income requirement ties the group to NJ-1040 line 29: “Your income on line 29 is more than the filing threshold amount for your filing status”. The same bullet carries an exception for older and disabled filers. If you were 65 or older or blind or disabled on the last day of the tax year (or your spouse was, on a joint return) and you were not required to file a return, the booklet sends you to its section for seniors and blind or disabled persons not required to file. That section says a filer in that position whose line 29 income is $20,000 or less ($10,000 if single or married/CU partner filing separately) and who meets the other eligibility requirements qualifies for the Property Tax Credit on line 56.
The booklet also lists who is not eligible, starting with “For a vacation home, second home, or any other property you do not reside in permanently;” and including “If you were a homeowner who made P.I.L.O.T. (Payments-In-Lieu-of-Tax) payments;”
What the instructions say to enter
| Step | What the booklet says |
|---|---|
| Before line 40a | “If you meet the eligibility requirements, complete line 40a, and either line 41 or 56.” |
| Line 40a, tenants | “Enter 18% of the rent paid for 2025.” “This is the amount that is considered property taxes.” |
| Line 40a, homeowners | “Enter the amount of property taxes due and paid to the municipality on your main home for 2025.” |
| Line 40a, shared or special cases | “If you answered “Yes” to any question above, complete Worksheet G on page 27 to determine the amount to report.” |
| Line 40b | “Fill in only one oval to indicate whether you were a homeowner, a tenant, or both a homeowner and tenant during 2025.” |
| Line 41 | “enter on line 41 the amount of the Property Tax Deduction from Worksheet H or Schedule NJ-COJ and make no entry on line 56.” |
For multiple owners, the booklet says “you can use only the amount of property taxes paid that reflects your percentage of ownership in the property”. For spouses who file separately: “enter on line 40a only one-half of the property taxes (one-half of 18% of rent) due and paid.”
Worksheet G, for the cases above, is a multi-column worksheet. It is not read on this page; the booklet prints it with the instructions for line 40a.
The figures the line prints
The deduction limit is in one sentence: “you can take either a Property Tax Deduction of up to $15,000 ($7,500 if you and your spouse file separate returns but maintained the same main home) or a Property Tax Credit.”
Worksheet H applies the limit in its line 2 instruction: “Enter the amount from line 1 or $15,000, whichever is less.” Worksheet H is a two-column comparison of the deduction and the credit. It is printed in the booklet and is not read here.
The booklet explains how to choose: “If you will receive a greater benefit by taking the deduction, enter on line 41 the amount of the Property Tax Deduction”. Those taking a credit for taxes paid to other jurisdictions follow a different path, described on NJ-1040 line 44.
Where the result goes next
The line 41 result reduces taxable income on the next line: “Subtract line 41 from line 39 and enter the result.” That is line 42, and the booklet adds “If you did not claim a Property Tax Deduction, enter the amount from line 39.”
If you take the deduction, make no entry on line 56. For general background on property tax relief, see property tax relief for seniors. For the wider state picture, see New Jersey retirement taxes and New Jersey and Social Security.
Part-year residents
The booklet prints a part-year paragraph where it explains the deduction and credit comparison: “You can claim a deduction or credit for property taxes or 18% of rent due and paid during the time you were a resident.” For line 40a it also says “Only include amounts due and paid while you were a resident of New Jersey.”
Edition and line numbers
This page reads the 2025 NJ-1040 New Jersey Resident Return booklet, the current file the New Jersey Division of Taxation served on 2026-10-24. Check the edition printed on your own form and use that edition’s line numbers.
Common mistakes
- Using a second home. The booklet says the deduction or credit is not available “For a vacation home, second home, or any other property you do not reside in permanently;”
- Claiming both the deduction and the credit. The booklet says you can take “either a Property Tax Deduction of up to $15,000” or the credit, and that for the deduction you “make no entry on line 56.”
- Entering full rent on line 40a. The booklet says “Enter 18% of the rent paid for 2025.”
Related: property tax relief for seniors, New Jersey retirement taxes, and New Jersey and Social Security.
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- 2025 NJ-1040 New Jersey Resident Return booklet (instructions and forms), New Jersey Division of Taxation: www.nj.gov
- 2025 Form NJ-1040 New Jersey Resident Income Tax Return, New Jersey Division of Taxation: www.nj.gov
Read from the state revenue documents linked above on October 24, 2026. General information, not tax advice. Your own facts decide the outcome, and a preparer or the state revenue department is the right place to confirm anything consequential.