Ask five new mothers how their leave was paid and you will get five different answers, because there is no single federal paid-leave program in the US. What you actually get is a stack of separate pieces: FMLA guarantees up to twelve weeks of unpaid, job-protected leave for eligible employees, your employer may pay some of those weeks at full or partial salary on top of that, and some states run disability or paid-family-leave programs that replace part of your wages for a limited stretch. None of these pieces line up automatically, so the only honest way to plan is to add them up yourself: your weekly salary, the weeks your employer actually pays and at what percentage, any state disability weeks you qualify for, and the tax bite on whatever income does arrive.
A simple example shows why the gap matters. Someone earning $52,000 a year makes about $1,000 a week. If the employer pays six weeks at full salary, that is $6,000 of gross pay; at a 25 percent tax rate roughly $1,500 goes to taxes, leaving about $4,500 net. If the total leave runs twelve weeks and only six are paid, the remaining six weeks (another $6,000 at that salary) are a straight income gap unless a state program, saved PTO, or a partner’s paycheck covers part of it. That gap is the number most families do not plan for until they are already living it, and it is exactly what the fields above are meant to surface before leave starts, not after.
Once you can see the shortfall in dollars, you can decide how to close it: savings built up before the due date, a partner picking up extra hours, or negotiating a phased return once the leave ends, such as three days a week for the first month back. Confirm with HR exactly how many weeks your plan pays and at what percentage, and check your state’s disability or paid-family-leave office directly instead of guessing, since eligibility rules and benefit amounts vary by state and change over time.
What FMLA actually guarantees
FMLA is job protection, not pay. If your employer has 50 or more employees and you have worked there at least a year with 1,250 hours logged, you are entitled to up to twelve weeks of unpaid leave without losing your position, and your employer has to keep your health insurance active on the same terms as if you were working (you still pay your normal share of the premium). It says nothing about a paycheck. Whether any of those twelve weeks come with pay depends entirely on your employer’s policy or a state program, which is why the calculator asks about FMLA-protected weeks and paid weeks as two separate inputs rather than assuming they are the same thing.
Stacking employer pay with state disability
Employer-paid weeks and state disability weeks do not simply add on top of each other in every case; the calculator treats state benefits as covering part of the unpaid gap left after your employer-paid weeks run out, up to however many state disability weeks you enter and at the percentage your state program pays. If your employer pays six of a twelve-week leave and your state covers, say, four more weeks at a partial percentage, you are left with two weeks that are genuinely unpaid. Enter zero for the state fields if your state has no such program, or if you are not sure you qualify yet.
Where the tax rate applies
The estimated tax rate you enter is applied only to the income you actually receive during leave, whether that is employer pay or state disability, not to the unpaid weeks. That distinction matters: an unpaid week is not a taxable event, it is simply money you do not have. So the net income figure above reflects taxes on your paid weeks, while the lost income figure reflects the full pre-tax value of the weeks nobody pays you for.
Closing the gap before it opens
Most of the financial stress of leave comes from timing, not the total amount. Building a cushion in the months before the due date, lining up a partner’s income or overtime, and asking HR early about a phased or part-time return can turn a scary total into a manageable few months. Some employers will agree to a reduced schedule for the first month or two back, which softens both the income hit and the childcare transition at the same time.