Health Savings Accounts (HSA) are often underutilized tools. Tax-Free on the way in, the way up, and the way out is as good a deal as you can get. I joke with clients if you end up the most healthy human being on the planet and never get to use it on health costs, at age 65 and later you can use it for anything and just pay the tax like you would with a 403b or 401k. The magic is when you save receipts for large medical bills and pay for the bills at the time with cash instead of the HSA. By doing this, that $4,000 labor and delivery receipt you saved and left the money in the HSA may be worth $8,000 in 10 years if you got a reasonable 7.2% return. At the time of this writing, there is no time limit on when you must reimburse yourself. Letting that money grow to be redeemed later leverages tax-free growth while being as accessible as a savings account if you find yourself in a pickle. We have a client with a baby that had multiple cleft palate surgeries with a nice amount of accessible funds available on demand while allowing their money to grow using this strategy.