States With the Largest Tax Bills – 2020 Edition
states with the largest tax bills
states with the largest tax bills


If you’re expecting a big refund, tax season can be a pleasant time of the year. There is always a chance, though, that you could end up actually owing the government money. Some taxpayers are able to cover those costs, while others have to turn to alternatives like payment via installment plan. With taxpayers meeting with their financial advisor or accountant to get prepared for tax season, SmartAsset decided to analyze the data and see which states have the biggest average tax debt among those taxpayers who do owe money to the government.

To find the states with the biggest tax bill in the U.S., we analyzed two metrics at the state level: the number of tax returns with underpayments and the total amount of underpaid taxes. For details on our data sources and how we put all the information together to create our final rankings, check out the Data and Methodology section below.

This is SmartAsset’s second study on the states with the largest tax bills. Check out the 2019 version here.

Key Findings

  • The average amount owed is $5,510. Across all 50 states and the District of Columbia, the average amount owed on tax returns with underpayments is $5,510.

  • Tax bills tend to be higher in the Northeast and lower in the Midwest. Northeastern states have the highest average tax bill when we compare the data by region. Among all Northeastern returns with underpayments, the average amount owed is $5,962 versus an average of $5,196 among Midwestern returns.

  • Some taxpayers will need twice as much on hand to pay Uncle Sam. In West Virginia, taxpayers owe $4,200 on average. That’s almost doubled in Wyoming, where taxpayers owe $8,000 on average.

1. Wyoming

Wyoming has the highest average amount owed in taxes across all 50 states and the District of Columbia, at $8,077. The total amount underpaid in the state, according to 2017 data, was $442,198,000 spread out across 54,750 tax returns with underpayments.

2. Florida

The average amount owed at tax time in Florida is $7,197, almost $900 less than our highest-ranking state for this metric, Wyoming. This is the result of a total underpayment amount in the state of $14,797,608,000 – the third-largest amount for this metric in the study overall – spread out across 2,056,190 tax returns with underpayments.

3. Massachusetts

According to IRS data from 2017, there were 736,170 tax returns with underpayments in Massachusetts. The total amount underpaid was $5,192,037,000, and the average amount a Massachusetts taxpayer owed was $7,053. Those looking tackle their taxes in the Bay State should check out the top financial advisor firms in Massachusetts.