How this instrument works
Zakat due is a fixed 2.5% of qualifying wealth, but only the portion sitting above a floor called nisab — wealth below that floor owes nothing at all. The arithmetic is deliberately narrow: it does not touch a household's full net worth, only assets that are liquid or tradeable and have been held for a complete lunar year (a hawl), such as cash, bank balances, gold, silver, and business inventory awaiting sale.
Nisab itself is set by two competing metal standards handed down from early Islamic jurisprudence: 87.48 grams of gold, or 612.36 grams of silver, priced at whatever the metals cost today. Because gold and silver move independently, the two standards rarely agree — silver is usually the smaller figure, so it pulls more people above the line and into the obligation, while gold sets a stricter, higher bar. This instrument does not price metals for you; you look up the current value for your chosen standard and supply it as Nisab threshold, $.
The person running this sheet is rarely a landlord or a fund manager — it's an individual or household closing out their own zakat year, often timed to Ramadan, tallying what actually qualifies before a single multiplication settles the amount. The most common misreading is feeding in total net worth instead of qualifying wealth: a primary home, a personal car, and furniture for one's own use are excluded even when they dwarf the cash on hand, and folding them in inflates the payment far past what is owed.
- Total your qualifying wealth — cash, savings, gold, silver, and business inventory held a full lunar year — into Qualifying wealth (cash, savings, gold, etc.), $.
- Price 87.48 grams of gold or 612.36 grams of silver in today's terms, per your own school of thought, and enter that as Nisab threshold, $.
- Read Zakat due, $ — the fixed 2.5% rate applied only to the amount your wealth clears above nisab.
- Recompute whenever holdings change or a new lunar year turns over; each year's figure is independent of the last.
Worked example — $500,000 against a $300,000 nisab
Set Qualifying wealth (cash, savings, gold, etc.), $ to $500,000 and Nisab threshold, $ to $300,000 — a household that has priced its cash, savings and gold and already looked up a nisab figure for the year. The formula subtracts nisab from wealth first: $500,000 minus $300,000 leaves $200,000 sitting above the floor. Only that surplus enters the next step, not the entire $500,000 held.
Multiplying the $200,000 surplus by the fixed 2.5% rate returns Zakat due, $ of exactly $5,000, the figure this instrument gives for those two inputs. Raise qualifying wealth while nisab stays put and the payment climbs at the same 2.5-cent-per-dollar step; drop wealth to or below $300,000 and the max() floor sends the result straight to zero instead of a small negative number.
Questions
What counts as qualifying wealth for Zakat?
Cash, bank balances, gold, silver, tradeable stock, and business inventory held a full lunar year count. A primary home, a car, furniture, and other everyday personal-use items do not, even when they're worth more than everything else combined — leave them out of the figure you enter entirely.
Why does the nisab threshold matter so much?
Nisab is the floor below which nothing is owed — traditionally 87.48 grams of gold or 612.36 grams of silver, priced in your currency. Below that line the formula returns zero rather than a fractional payment; above it, the fixed rate applies only to the surplus, never to the whole sum held.
Should I use the gold or the silver nisab figure?
Either is accepted, but they rarely match, since the two metals price independently. Silver usually gives the smaller figure, so more people clear it and owe something; gold sets a larger, stricter bar. Enter whichever your own school of thought specifies as Nisab threshold, $.
Is this the same calculation as Zakat al-Fitr?
No. Zakat al-Fitr is a small, fixed payment per household member due at Ramadan's end, unrelated to wealth or nisab. What this instrument computes is Zakat on wealth — a percentage of qualifying assets held above nisab for a full lunar year, worked out fresh on its own date each year.
Do debts reduce the wealth I should enter?
Many scholars allow subtracting debts due immediately — rent owed, bills, wages payable — from gross holdings before comparing to nisab, while a long-term balance like a mortgage is treated differently across schools of thought. Net the figure against your own guidance before it goes into Qualifying wealth.
Why one flat 2.5% instead of a sliding scale?
Zakat on cash-type wealth uses a single fixed rate no matter how far above nisab the total sits — there is no bracket system the way income tax uses one. A household at $310,000 and one at $3,100,000 both pay 2.5% of whatever clears their own nisab line, which is why the formula is one multiplication, not a table.
References
Read this first: This instrument shows arithmetic, not advice. Real offers add fees, taxes and terms that vary by lender and place — verify the figures against your actual paperwork before deciding anything.