The latest state Tax Commission revenue summary shows more good news for Utah's bottom line: The state's estimated surplus has expanded to $112 million.

The new surplus has swelled by $25 million since last month's figures - and that's on top of a $235 million surplus and $370 million in projected growth state leaders built into the budget in March.

"You had a large surplus then," legislative analyst Bryant Howe told members of the state Revenue and Taxation Committee Wednesday. "Since then, the surplus has grown even more."

Corporate franchise-tax revenues are up 29 percent in fiscal 2005 to $162 million. Growth from severance taxes collected on oil and gas extractions is up 44 percent. And personal-income taxes have grown by more than 13 percent this year. Individual tax returns totaled $1.6 billion, including $303 million in April. More than $70 million of the total surplus is from increased income tax revenue.

At the same time, income tax refunds were down 4 percent at $79 million and payroll taxes fell by 2 percent last month. Howe said that dip may be a "one-month glitch" in employment growth.

The numbers come in the tenth month of the fiscal year that ends June 30. State Budget Director Richard Ellis said that's enough time to establish a healthy surplus. But while the state's revenues have grown by an average of 6 percent this year, Ellis said it's unlikely that trend will continue. He predicts 3 to 5 percent growth next year.

"We've never had back-to-back years like this," Ellis said. "It's been relatively volatile."

While the numbers are heady, Senate Budget Chairman Lyle Hillyard warned his colleagues not to start spending yet. The final surplus number will be set in September. Before that happens, money for the rainy-day fund, debt and tax credits for expanding businesses will be siphoned off.

"It's always good to hear you're up rather than down," Hillyard said. "But don't go to the bank thinking you've got $112 million to spend."