After landing a new job, I opened a health savings account (HSA) in February 2019. I decided to contribute $1 of my pay per pay period to my HSA. However, I can change my contribution amount at any time.
Recently I've been advised by my endodontist that a $10,000 operation is in order. If I'm having the operation in 5 pay periods, can I now start funneling in $2,000 per pay period into my HSA, enabling me to pay the bill in full through my HSA debit card, and expect to have $10,000 less in taxable income? Or, does the IRS lay out time restrictions for a scenario like this (in which case I can postpone my operation to next year and have the same result).