If you're a freelancer, contractor, or single-member LLC in New Jersey, you owe quarterly estimates to two agencies — IRS for federal, New Jersey Division of Taxation for state. The top marginal rate is 10.75%. Penalties on under-paid estimates accrue independently per agency.
New Jersey uses a progressive bracket system on top of federal tax. For single filers in 2026:
| Income (single filer) | Marginal rate |
|---|---|
| $0 – $20,000 | 1.40% |
| $20,000 – $35,000 | 1.75% |
| $35,000 – $40,000 | 3.50% |
| $40,000 – $75,000 | 5.53% |
| $75,000 – $500,000 | 6.37% |
| $500,000 – $1,000,000 | 8.97% |
| $1,000,000+ | 10.75% |
Federal estimated tax due dates (April 15, June 15, September 15, 2026, and January 15, 2027) apply to your New Jersey state estimated payments as well — most states piggyback on the federal schedule. Pay New Jersey taxes through the New Jersey Division of Taxation's online portal: www.nj.gov/treasury/taxation. You can also mail Form NJ-1040-ES with a check.
Federal and state estimated tax safe harbors work in parallel for New Jersey freelancers. Hit the federal safe harbor (90% of current-year federal tax OR 100% of prior-year federal tax — 110% if your prior-year AGI exceeded $150,000) and you avoid the IRS underpayment penalty on Form 2210.
For New Jersey state estimated taxes, most filers can match the federal safe harbor approach by paying 100% of last year's New Jersey tax in four equal quarterly installments. New Jersey's underpayment penalty is calculated on the state's equivalent of Form 2210 — the DOT can assess interest plus a flat penalty on the under-paid amount.
Practical advice for New Jersey self-employed taxpayers: pay both federal and state estimates on the same quarterly schedule (April 15, June 15, September 15, January 15). File your federal payment via IRS Direct Pay and your state payment via www.nj.gov/treasury/taxation. Keep records of every payment — both agencies can request proof if the safe-harbor math is challenged later.
Four things New Jersey freelancers should know before their first quarterly payment:
New Jersey has the third-highest top rate (10.75%) and applies it starting at $1M. NJ does NOT recognize federal QBI, S-corp pass-through deductions, or HSA deductions — all common federal benefits are added back on the NJ return. Plan ~10-15% higher state burden than federal projections suggest.
Five common errors that bite New Jersey freelancers at filing time: