Ask ten expecting parents about leave and most will tell you they get twelve weeks. The Family and Medical Leave Act does promise twelve weeks of job protected leave after a birth, an adoption or a foster placement. What it does not do is apply to everyone who works. Three separate tests stand between a worker and that protection, and failing any one of them means the law simply does not reach you. Federal survey work has consistently found that a large share of American workers do not qualify. Finding out which side of the line you are on is a thirty minute job that almost nobody does before the due date.

The first test is the employer. A private company is covered only if it employed 50 or more people for at least 20 workweeks in the current or previous calendar year. Public agencies and public and private elementary and secondary schools are covered no matter how small they are. A 30 person business is not covered, even if it is profitable and well run and wants to help. This is a hard line and it does not bend. Small firms employ a very large share of the country.

The second test is your worksite. Even at a covered employer, you are eligible only if the company has 50 or more employees within 75 miles of where you work. A national chain with thousands of workers can still have a branch that fails this count. Remote workers are measured against the site they report to rather than their kitchen table, which usually helps rather than hurts. This rule surprises people the most. Two workers at one company can have different rights based on geography alone.

The third test is you. You must have worked for that employer for at least 12 months, and those months do not have to be consecutive. You must also have worked at least 1,250 hours in the 12 months right before the leave starts, which comes to roughly 24 hours a week. Part time workers frequently miss that hour count without realizing it. So does anyone who changed jobs during pregnancy, which is a common and entirely reasonable thing to do. Time on paid vacation counts as hours worked only if you actually worked them, so the math is stricter than it sounds.

Then there is the part that shocks people most. FMLA leave is unpaid. The law protects your job and requires your employer to keep your group health coverage on the same terms, but it does not send a check. Any pay during leave comes from somewhere else, such as accrued vacation, short term disability insurance, an employer policy or a state program. Thirteen states and the District of Columbia have enacted their own paid family leave programs funded through payroll contributions, and the rules for each are different. If you live in one of them, that program is often more generous and easier to qualify for than the federal law.

Several other rules are worth knowing before you need them. Both parents are entitled to leave, though if they work for the same employer the total for bonding can be limited to twelve weeks combined. Leave for a new child must generally be taken within twelve months of the birth or placement. Intermittent leave for bonding requires employer agreement, while intermittent leave for a serious health condition does not. Your employer can require you to use paid time off at the same time as FMLA rather than stacking them. Notice matters as well, since foreseeable leave requires 30 days of advance notice when possible.

State law is where many families actually find protection. Some states lower the employer size threshold to 15 or even fewer employees. Some count a broader set of family members. Some pay a percentage of wages for a set number of weeks through a state fund you already contribute to. These programs stack on top of the federal law rather than replacing it, and the paperwork usually runs through a state agency instead of your employer. A single search for your state name plus paid family leave will settle it in a few minutes.

The practical step is to check all three tests now rather than in the third trimester. Ask human resources in writing whether you are FMLA eligible and ask for the answer in writing back. If you are not eligible, you still have room to negotiate, and asking early is far stronger than asking late. Look up your state program, look at short term disability if it is offered, and find out whether your employer has its own policy that goes further than the law. Learning you are not covered eight months out is a planning problem. Learning it the week you deliver is something worse.

Sources: U.S. Department of Labor, Wage and Hour Division.