When you make Social Security contributions, you also make contributions to your Medicare account. As of 2018, both you and your employer contribute 1.45 percent to Medicare (self-employed people contribute 2.9 percent). If you earn more than $200,000, or $250,000 for a couple, you pay 0.9 percent more in Medicare taxes. Check your Social Security statement to make sure you're getting credited properly for everything you've paid.

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