07/01/2026
You might not be withholding enough taxes:
Everyone has a general idea of how much their salary is and what their take-home pay is. And some people might understand that increasing pretax benefits at work could lower your tax bill. However, when it comes to other pieces of the tax equation (e.g., retirement account withdrawals, capital gains, pensions), withholding the suggested percentage recommended by your broker may not be enough.
Example: Munetaka is 32 years old and single, lives in Illinois, and makes a $150,000 salary. Munetaka withholds the proper amounts for federal and state taxes. Munetaka has sold some investments in his brokerage account to pay for a vacation, leading to $5,000 in short-term capital gains. In addition, Munetaka converted $100,000 of his 401k into a Roth IRA to avoid paying taxes on these withdrawals in retirement. Munetaka didn't make any withholdings for his brokerage account but Munetaka withheld 20% for taxes.
What Munetaka missed: Regarding the brokerage account, the capital gains will be taxed at Munetaka's ordinary tax rate since they are short term. He will not receive preferential tax treatment since he didn't hold the investments longer than one year. Regarding the Roth conversion, Munetaka's total income for the year places him in a tax bracket higher than 20%. Moreover, there is a 10% penalty assessed on this type of transaction.
Outcome: Munetaka was expecting a minimal tax bill given the proper amounts were being withheld from his W-2 and since he withheld money for taxes on the retirement account transaction. In reality, Munetaka is left owing the IRS more than $19,000 and the state of Illinois $250.
Wilson CPA Services can help you estimate the proper amount to withhold for taxes or make an estimated tax payment during the year. Please reach out to learn how certain transactions impact will impact your tax return.