New Jersey estimated tax (quarterly) calculator
Plan quarterly payments based on New Jersey tax rules.
How this calculator works
Step 1 estimates your New Jersey tax based on the taxable income you provide and the New Jersey 1.4%–10.75% brackets. The tool adjusts for New Jersey-only income using your allocation %.
Step 2 uses your withholding and prior-year tax (if provided) to estimate a quarterly plan that aligns with New Jersey’s 80% current-year or 100% prior-year safe-harbor rules.
Step 3 divides the remaining tax into four equal payments and lists the standard due dates used by New Jersey.
Frequently asked questions
When are New Jersey estimated payments due?
New Jersey uses the standard quarterly dates: April 15, June 15, September 15, and January 15 of the following year.
What if withholding changes later?
Recalculate with updated withholding to keep your quarterly plan accurate.
Is the safe harbor the same as federal?
New Jersey generally follows an 80% current-year or 100% prior-year safe harbor. Special rules apply if at least two-thirds of your income is from farming or ranching.
Estimates use New Jersey’s published brackets (1.4%–10.75%) and are not a substitute for official payment calculations.