Most Americans with Social Security numbers are eligible for coronavirus stimulus checks. However, those who file married joint returns with spouses who use ITIN numbers could not initially receive checks. Higher income Americans also saw their checks reduced or their eligibility eliminated entirely. The full amount of the stimulus checks was available for single filers earning up to $75,000, heads of household earning up to $112,500, and married joint filers earning up to $150,000. For those earning more, the amount of the check was reduced by $5 per each extra $100.