Yes, but only if the employer offers it. Under section 601 of the SECURE 2.0 Act, an employer that maintains a SIMPLE IRA plan can give participating employees the option to designate a Roth IRA as the account that receives their plan contributions, creating what the IRS calls a Roth SIMPLE IRA.
The option is up to the employer, so check your plan before assuming Roth contributions are available. The tax treatment differs from a traditional SIMPLE IRA. Employee salary reduction contributions to a Roth SIMPLE IRA are subject to federal income tax withholding, Social Security and Medicare (FICA) taxes, and federal unemployment (FUTA) taxes, and they are reported in boxes 1, 3 and 5 of Form W-2 and in box 12 with code S. Employer matching and nonelective contributions sent to a Roth SIMPLE IRA are not subject to withholding for income tax, FICA or FUTA. Instead, the employer reports them on Form 1099-R for the year they are made. The IRS explains the detailed rules in Questions and Answers K-1 through K-8 of Notice 2024-2.
Source: IRS, “SECURE 2.0 Act impacts how businesses complete Forms W-2”
Image: Deposit into a piggy bank, by Ken Teegardin, CC BY-SA 2.0, via Wikimedia Commons.