Arizona small businesses have both federal and state payroll tax obligations. The federal side is the same everywhere. The good news is that Arizona keeps the state side fairly straightforward compared to places like California or New York.

On the federal level, you and your employees each pay 6.2% for Social Security on wages up to the annual wage base (which adjusts each year). Medicare is 1.45% from each side with no cap, and employees earning over $200,000 pay an additional 0.9% Medicare tax that you don’t have to match. Federal Unemployment Tax (FUTA) is 6.0% on the first $7,000 per employee, but after the standard state credit most employers pay an effective rate of 0.6%. That comes out to about $42 per employee per year.

For Arizona-specific taxes, there are two main obligations. First is state income tax withholding. Arizona has a flat income tax rate of 2.5%. Your employees fill out Form A-4 to select their withholding percentage, with options typically ranging from 0.5% to 3.5% of gross taxable wages. You withhold their chosen amount from each paycheck and remit it to the Arizona Department of Revenue.

Second is State Unemployment Insurance, which is paid by the employer only. New employers in Arizona generally start with a rate around 2.0% on the first $8,000 of each employee’s wages per year. Over time your rate adjusts based on your claims experience. Fewer unemployment claims filed against your account means a lower rate going forward.

Arizona does not have state disability insurance, paid family leave taxes, or local city payroll taxes. That makes your state payroll burden lighter than in many other states.

For deposit schedules, most small businesses deposit federal payroll taxes monthly, due by the 15th of the following month. Arizona state withholding is typically remitted quarterly for smaller employers using Form A1-QRT, with an annual reconciliation filed on Form A1-R. FUTA deposits are due quarterly if your liability exceeds $500.

Getting payroll taxes wrong leads to penalties that add up fast. The IRS is particularly aggressive about payroll tax compliance because it involves trust fund taxes, meaning money you’ve withheld from employees that belongs to the government. Late deposits, incorrect filings, or misclassifying employees as independent contractors can all trigger problems. Working with a small business accounting firm that understands these obligations helps you avoid costly mistakes. And having your full-service bookkeeping handled properly means your payroll liabilities are tracked accurately in your books each month, so nothing falls through the cracks at filing time.