What makes a waqf different from an ordinary charitable donation?

A one-time donation is typically spent and gone; a waqf's principal is legally locked and preserved forever, with only the income or usufruct it generates distributed for the charitable purpose — an ongoing, self-sustaining source of charity (sadaqah jariyah).

Who decides how the waqf's income is used?

The founder (waqif) specifies the purpose and beneficiaries when establishing the waqf, and a trustee/administrator (mutawalli/nazir) manages it accordingly afterward — this calculator doesn't set or track terms, only the payout math.

Is the return rate I enter guaranteed?

No — this calculator simply multiplies whatever return rate you enter by the principal; actual investment returns depend entirely on how the principal is invested and carry real risk, including loss.

Must a waqf's investments be Shariah-compliant?

Yes, in principle — since a waqf is a religious endowment, its underlying investments are generally expected to follow Shariah-compliant structures, which this calculator doesn't verify or enforce.

Can a waqf be dissolved or its principal reclaimed later?

Classical fiqh generally treats a properly constituted waqf as permanent and irrevocable — the founder gives up ownership once it's established. Some modern waqf laws provide narrow restructuring mechanisms, but reclaiming the principal outright generally isn't possible.

Can a waqf be established for a specific family rather than the general public?

Yes — a "family waqf" (waqf ahli/dhurri) endows income for the founder's descendants, as distinct from a "charitable waqf" (waqf khairi) for public benefit; both share the same preserved-principal structure this calculator computes.

What happens if the waqf's investment loses money in a given year?

This calculator doesn't model losses — it assumes a positive return rate you supply. In real life, an underperforming investment can shrink the distributable amount (and potentially the principal), which is why administrators generally favor lower-risk, capital-preserving investments.

Is a cash waqf the same as a real-estate waqf?

Both share the core "preserve the principal, distribute the return" structure, but real-estate waqfs traditionally generate income through rent, while cash waqfs generate income through Shariah-compliant investment — this calculator applies to either, since it only computes a percentage-based payout.

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Waqf Calculator

Annual distributable amount from an endowed principal, corpus preserved forever.

🔒 Runs entirely in your browser — nothing here is ever uploaded

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Last reviewed 2026-09-06

About the Waqf Calculator

Computes the annual amount distributable from an endowed (waqf) principal, with the principal itself preserved forever.

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How to use it

Enter the endowed principal.
Enter the expected annual return/payout rate.
Read the amount distributable each year.

Formula

Annual distribution = principal × return rate. The principal itself is never spent.

Worked example

A $100,000 endowment at an expected 4% annual return distributes $4,000 per year, indefinitely, while the $100,000 principal stays intact.

Example annual distribution by return rate (on a $100,000 endowment)

Example annual distribution by return rate (on a $100,000 endowment)
Annual return rate	Annual distribution	Principal
2%	$2,000	$100,000 (preserved)
4%	$4,000	$100,000 (preserved)
6%	$6,000	$100,000 (preserved)
8%	$8,000	$100,000 (preserved)

Interpreting your result

This is a straightforward perpetuity calculation, not a religious computation — the actual return you'll earn depends entirely on how the principal is invested. A real waqf's terms and Shariah-compliant investment structure should be set up with a qualified scholar and financial advisor, not this tool alone.

Recommendations

• A higher assumed return rate isn't automatically better — it usually means a riskier investment, which can threaten the very principal a waqf is meant to preserve forever.

Frequently asked questions

No — preserving the principal in perpetuity is the defining feature of a waqf. Only the return it generates is distributed for its charitable purpose.