There is no fixed percentage for sadaqah, unlike Zakat's 2.5% — any calculator that implies otherwise is guessing. What follows is an honest tool: pick a percentage benchmark that other giving guides commonly use, apply it to your income, and treat the result as a starting point to adjust, not a religious calculation to get "right".
Key Takeaways
- Sadaqah has no obligatory minimum or fixed rate — unlike Zakat, which is calculated at 2.5% of qualifying wealth above the nisab threshold.
- Percentages like 2.5% or 10% of income appear on other "sadaqah calculators" as common practical benchmarks, not because either figure is religiously mandated for voluntary charity.
- The calculator below uses a simple formula — income × your chosen percentage — and shows the result as a daily, monthly, and annual figure so you can see what different rhythms of giving actually look like.
- If you have no regular income, percentage-based tools don't apply well; a fixed small weekly amount or a "round up your spending" habit works better.
- Whatever figure comes out, the Prophet ﷺ cautioned against taking on more than you can sustain (Sahih al-Bukhari 6465) — a smaller amount kept up consistently outweighs a larger one you can't maintain.
Is there a fixed percentage for sadaqah like there is for Zakat?
No, and this is worth being direct about before using any calculator, including this one. Zakat has a precise, scholarly-agreed calculation: 2.5% of qualifying wealth held above the nisab threshold for a full lunar year. Sadaqah has none of that — it's voluntary, with no minimum, no percentage, and no threshold. Several "sadaqah calculators" online present a percentage slider as if it were a formula; it isn't. It's a convenience tool built on common benchmarks, and this calculator is no different — the honesty is in saying so plainly rather than letting the maths imply an authority it doesn't have.
How does this calculator work?
Enter your income and how often you receive it, choose a percentage benchmark (or drag the slider to any value between 0.5% and 20%), and the tool multiplies your income by that percentage, then converts the result into daily, monthly, and annual figures. That's the entire calculation — there's no hidden adjustment for expenses, dependents, or debts, because a percentage-of-income tool can't sensibly account for those. Treat the output as a conversation starter with yourself, not a final number.
What percentage of income do people commonly use as a guide?
Other UK sadaqah calculators and giving guides typically offer a range between 1% and 10%, sometimes with 2.5% highlighted for comparison with Zakat, and 10% offered as a round, memorable figure some people adopt as a personal habit rather than a requirement. None of these numbers come from a hadith mandating a sadaqah rate — they're practical anchors, borrowed partly from Zakat's own rate and partly from general "give a tenth" habits found in other traditions of giving. Pick whichever feels sustainable for your circumstances; there's no wrong choice on this scale.
What if I don't have a regular income?
Percentage-of-income tools assume a steady figure to work from, which doesn't fit everyone — students, those between jobs, or anyone on irregular or variable income. In that case, two alternatives tend to work better than forcing a percentage calculation:
- A small fixed weekly amount — something you'd barely notice missing, kept consistent regardless of how the week has gone financially.
- Rounding up everyday spending — treating the difference between a purchase and the nearest pound (or five pounds) as your sadaqah, so the amount naturally scales with how much you're spending day to day.
Both sidestep the need for a stable income figure while still building the habit of regular giving — see HNCO's guide to setting up monthly sadaqah for how to automate either approach, or HNCO's guide to sadaqah in Rajab if you'd rather give in occasional bursts around meaningful times instead.
Should I calculate sadaqah on gross or net income?
There's no ruling that settles this either way, so it's a personal choice. Net (take-home) income is the more common practical choice, since it reflects money you actually have available rather than a figure reduced by tax and other deductions you never see. Some people prefer gross income precisely because it's the larger, more generous base — either is defensible; consistency matters more than which one you pick.
How is sadaqah different from Zakat when it comes to calculating amounts?
Sadaqah vs Zakat — how the amount is decided
| Factor |
Sadaqah |
Zakat |
| Obligation |
Voluntary |
Obligatory (one of the Five Pillars) |
| Rate |
None fixed — any amount counts |
2.5% of qualifying wealth |
| Threshold |
None |
Nisab (a set wealth threshold) |
| Timing |
Any time, any frequency |
Once per lunar year, on wealth held a full year |
| Who can receive it |
Anyone in need, or general good causes |
Restricted to specific categories in the Qur'an |
Because of this, a genuine Zakat calculation is precise and rule-based in a way a sadaqah calculator can never honestly be — worth knowing if you land on this page looking for your Zakat figure specifically.
Sadaqah Calculator — Frequently Asked Questions
Is there an official sadaqah percentage I should follow?
No. Unlike Zakat's fixed 2.5% rate, sadaqah has no mandated percentage — any amount you can sustainably give counts.
Why does this calculator use a percentage if sadaqah has no fixed rate?
A percentage-of-income formula is simply a practical way to turn "give what you can" into a concrete number to start from — it's a convenience tool, not a religious calculation.
Should I use gross or net income in the calculator?
Either is defensible; net (take-home) income is the more common practical choice since it reflects money you actually have available.
What if my income is irregular or I don't have one?
Try a small fixed weekly amount or rounding up everyday purchases to the nearest pound, rather than forcing a percentage calculation onto unstable income.
Is this the same as a Zakat calculator?
No. A genuine Zakat calculation is precise and rule-based — 2.5% of qualifying wealth above the nisab threshold. This tool is for voluntary sadaqah, which has no equivalent formula.
Is a larger one-off sadaqah better than smaller regular amounts?
Not necessarily — the Prophet ﷺ specifically praised deeds that are small but consistent over larger ones that aren't sustained (Sahih al-Bukhari 6465).
HNCO — Hajjah Naziha Charitable Organisation
UK non-profit organisation delivering Sadaqah Jariyah water wells and masjid-building projects in Pakistan and Kenya since 2010.
About HNCO
