Is there a time limit to when I can reimburse myself?

No, there is no time limit to when you can reimburse yourself, as long as the eligible medical expenses were incurred after you opened your HSA.

For example, if you opened your HSA in January 2021 and had eligible medical expenses in June 2021 but decided to pay out-of-pocket, you can be reimbursed for those funds months or even years later. This is a great way to utilize your HSA as an emergency savings fund for larger expenses down the road. This also helps with saving for retirement. If you reach retirement age with years’ worth of eligible medical expenses, you can still receive reimbursement for these expenses free of taxes. The main thing to remember when applying this strategy is to ensure you keep all your medical receipts and documentation in case of IRS audit.