However, there are instances when you may be able to take advantage of both an FSA and the tax credit, Alison said. Generally, for 2021, if your qualified expenses exceeded your FSA reimbursements, the difference could qualify if the total doesn’t exceed $8,000 (one child) or $16,000 (two).
For example: If you used $5,000 in FSA dollars yet spent $12,000 in care for your one child, you could use $3,000 — the difference between $5,000 and $8,000 — of the excess toward the tax credit.
Meanwhile, the 50% share of expenses for 2021 is for taxpayers with income of $125,000 or lower. So in the above example, you’d get 50% of $3,000, or $1,500, as a credit.
Above that income threshold, the credit begins to phase out, until reaching 20% for income of $183,000 to $400,000 and completely disappearing at income above $438,000.
Before the 2021 change, the maximum of 35% started going lower at income above $15,000 until reaching 20% at about $45,000.