Zakat due date calculator
Find the date your zakat falls due, counted as a lunar year from the day your wealth reached nisab rather than from a Gregorian anniversary.
Zakat has a date, and it is yours alone
Zakat on wealth is not an annual tax with a common deadline. It falls due once your own wealth has been held above nisab for one lunar year. That year starts on the day you first crossed the threshold, so two people in the same household can easily have different zakat dates.
The eleven-day trap
A lunar year runs about 354 days; a solar year runs 365. Anyone who pays on the same Gregorian date each year is therefore letting their zakat year stretch by eleven days annually. Do that for long enough and a whole zakat year goes unpaid, roughly one in every thirty-three.
It is not a dramatic error in any single year, which is exactly why it goes unnoticed. Working from the Hijri anniversary, as this tool does, avoids it entirely.
When wealth dips below the threshold
This is the part that is genuinely unsettled, and the tool asks rather than choosing. One widely held position tests only the two ends of the year: if you were at nisab when it opened and are at nisab when it closes, what happened in between does not matter. Another requires nisab to be held throughout, so any fall restarts the year from the day wealth next reaches the threshold.
The gap between those readings can be most of a year, which is too large to paper over with a default. Wealth falling to nothing ends the year on either reading, so that case is not offered as a choice.
Paying in Ramadan
Very common, and there is nothing wrong with it, paying ahead of the due date is permitted. But it is a practice rather than the rule, and it is worth being clear which you are doing. If your year closes in Shawwal and you pay each Ramadan, you are paying early every year, not on time.
What the indicative figure is and is not
If you enter your wealth, the tool shows what 2.5% of it would be. That is a sense of scale, not a bill. Zakat is assessed on what you hold when the year actually closes, and between now and then it will move. Work out the real figure on the day, with the full zakat calculator.
If you have never tracked this
Most people have not. Take the earliest date you are reasonably confident your wealth was above nisab, use it, and keep it consistent from now on. Erring earlier means paying slightly sooner than strictly required, which is permitted; erring later means paying late, which is not.
Questions
When does my zakat year start?
Why is the year 354 days rather than 365?
What if my wealth dropped below nisab during the year?
Most people pay in Ramadan. Is that the rule?
Is the figure the tool shows what I will owe?
I missed a zakat year. What now?
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