SUI Rate Verification: Why Your Payroll Provider Might Be Wrong

State unemployment insurance (SUI), also known as SUTA, is a payroll tax every employer pays. Unlike flat payroll taxes, SUI rates are individualized — each employer gets an assigned rate based on their specific claims history. That rate changes annually. And your payroll provider may not update it correctly.

The result: employers systematically overpay or underpay SUI every year, often without knowing it. Overpayment is simply lost money. Underpayment becomes a collection action with penalties and interest attached.

How SUI Experience Rating Works

Most states use one of two methods to assign SUI rates. Reserve ratio states (including Ohio, California, and most of the midwest) calculate a reserve ratio: the employer's account balance divided by average taxable wages over a lookback period. Employers with higher reserve ratios get lower rates. Benefit ratio states (including Florida, Michigan, and Illinois) calculate a benefit ratio: total UI benefits charged against the account divided by total taxable wages.

Each year, the state mails an annual rate notice — usually between November and January for the upcoming calendar year. This notice shows the new experience rate. Employers have a limited window (typically 30 days) to protest if the rate is incorrect.

Three Ways Payroll Providers Get Rates Wrong

1. Applying Last Year's Rate

The most common error. A payroll system updates rates based on a flat data import from the state. If the import fails, or if the employer's account was not correctly linked, the system defaults to the prior year rate. This can persist for months or an entire year before anyone notices.

2. Multi-State Rate Confusion

Employers with workers in multiple states must track a separate SUI rate for each state. A California employee working remotely in Oregon triggers Oregon SUI, not California SUI. Payroll systems with poor multi-state configuration apply the wrong state's rate — or worse, apply the employer's home state rate to all employees regardless of work location.

3. New Employer vs. Experience Rate

New employers get a flat new employer rate for their first 1-3 years. Once they accumulate enough claims history, they transition to an experience rate. Some payroll systems continue applying the new employer rate past the transition date — which can mean overpaying significantly if the experience rate is lower.

How to Manually Verify Your SUI Rate

To verify your SUI rate without Kreto, you need three pieces of information:

1. Your current year SUI rate notice from the state agency
2. Your payroll system's SUI configuration for the relevant state
3. The state's published rate table to verify the agency's calculation

Compare the rate on your notice to the rate in your payroll system. If they differ, the payroll system needs correction. If the rate on the notice looks wrong relative to your claims history, you have grounds to protest — but you must act within the deadline.

2026 SUI Wage Bases — All 50 States

The wage base is the annual per-employee amount on which SUI tax is calculated. Once an employee's wages exceed the wage base, SUI stops accumulating for that year. Higher wage bases mean higher SUI liability for employers with well-paid employees.

Source: State unemployment agency publications for 2026 calendar year. Washington has the highest wage base at $68,500. Hawaii follows at $59,100. California, Florida, Arkansas, and Tennessee have the lowest at $7,000.

How Kreto Automates SUI Rate Verification

When you upload a SUI rate notice to Kreto, the platform extracts the assigned rate, tax period, and effective date automatically. It then compares the extracted rate against the rate applied in your connected payroll system. If there is a discrepancy, Kreto flags it, calculates the exposure, and generates a protest letter pre-populated with the correct regulatory citations.

For CPA firms, Kreto runs this verification automatically across all client accounts as each notice arrives. No manual cross-referencing required.