What this calculator actually measures
Almost every other calculator on this subject answers one question: how much is the tithe this month. This one answers a different one — what the whole thing costs. Not one payment, but the sum of everything: the money you handed over, the hours you will never get back, and the work you did not do because the parish needed you on Sunday morning.
Four inputs, one number, and a lifetime figure that most people find difficult to look at. If you are eighteen today and stay until eighty, the calculator will show you sixty-two years of it.
A tithe calculator and this calculator are not the same tool
A tithe calculator tells you that ten percent of your income is ten percent of your income. True, and worth knowing — but ten percent of a salary is not the cost of a religion. The cost is ten percent for forty years, plus the fuel to the pilgrimage, plus the candles, the christening, the collection at a stranger's funeral, two hours every Sunday, twenty minutes every morning of prayer, the volunteering, the retreat, the books, and the business you never started while you were being a good Christian.
None of that fits in a tithe calculator. All of it fits here.
What a tithe actually is
A tithe is one tenth. The word comes from the Old English teogotha, and the command behind it is Malachi 3:10: bring the whole tithe into the storehouse. In the Hebrew Bible that tithe was agricultural produce, not cash — grain, wine, oil, livestock — collected on a three-year cycle and shared with the Levites, the foreigner, the orphan and the widow (Deuteronomy 14:22–29). Cash tithing is a later invention, and a very successful one.
What churches teach today varies more than most believers realise:
- Catholic Church: no fixed ten percent rule. Many dioceses recommend proportional giving, and a common guideline is five percent to the parish and five percent to other charities.
- The Church of Jesus Christ of Latter-day Saints: ten percent of income, taught as a commandment.
- Seventh-day Adventists: ten percent tithe plus a separate line of offerings.
- Jehovah's Witnesses: no tithe at all — voluntary donations, with no amount named.
- Islam: not a tithe but zakat, roughly two and a half percent of accumulated wealth, once a year.
If your church names no figure, enter what you actually give. That is the only number that matters to your own life.
How much is the tithe on $10,000 — or on your salary?
Ten percent. The only real question is ten percent of what, and how often. On an annual income the figures look like this:
| Annual income | 10% a year | 10% a month | Over 40 years |
|---|---|---|---|
| $10,000 | $1,000 | $83 | $40,000 |
| $20,000 | $2,000 | $167 | $80,000 |
| $30,000 | $3,000 | $250 | $120,000 |
| $50,000 | $5,000 | $417 | $200,000 |
| $75,000 | $7,500 | $625 | $300,000 |
| $100,000 | $10,000 | $833 | $400,000 |
The same numbers apply in euros. And every figure in the last column assumes the income never rises — which, over forty years, it usually does. That is why the calculator asks for your own numbers instead of averages.
Gross or net?
Most teaching says gross: before tax, on the money you never actually receive. Plenty of believers give on net income instead. Both are inside the calculator — enter the amount you really pay, not the amount someone told you to pay.
Why the lifetime figure is so much larger than the yearly one
Because annual costs repeat. A cost of twelve thousand a year over sixty-two years is not twelve thousand — it is three quarters of a million. And the money has a second life: had the cash contributions been invested instead at a net six percent a year, the calculator shows what the portfolio would have become. That compounding is not a trick or an exaggeration; it is what a bank does with money that is left alone.
What this calculator does not count
It does not count what you got in return — the music, the community, the consolation, the weddings and the funerals that carried you. It is a bill, not a verdict. It also ignores inflation, salary growth and currency conversion: every figure is in today's money, so the total is honest but not exact.
If the consolation was worth the price, no calculator decides that for you. This one only makes sure you know what the price was.
Questions people ask before they use it
How much is the tithe for $10,000?
Ten percent: $1,000. If the $10,000 is a monthly income, that is $12,000 a year, and over forty years $480,000.
Is tithing calculated on gross or net income?
Most churches teach gross — before tax. Many believers give on net. Enter whichever you actually use; the calculator does not assume.
How do I calculate the tithe from my salary?
Divide your income by ten. On a monthly salary of €2,400 that is €240 a month, €2,880 a year. The quick field above the financial section does it for you and fills the form.
Is there a monthly tithe calculator?
This page is one. Choose “per month”, type your income into the quick field, and it gives you the monthly figure and the annual total at the same time.
What is a 10% tithe calculator?
Any tool that multiplies income by 0.10. This calculator does that and then continues: it adds the direct costs, the hours, and the earnings you never made, and carries the total across your whole life.
Does the Catholic Church require a 10% tithe?
No. The Catholic Church sets no fixed percentage and has no biblical tithe law in force. Many dioceses suggest proportional giving, often described as five percent to the parish and five percent to other charities — a guideline, not a rule.
How much does the Bible say to tithe?
Ten percent, in the Hebrew Bible, on agricultural produce — Malachi 3:10 is the verse usually quoted. The New Testament names no percentage at all: 2 Corinthians 9:7 speaks of giving as one has decided in his heart, not reluctantly or under compulsion.
Is there an app for the cost of religious belief?
This page is it. It runs entirely in your browser, needs no installation and no account, and stores nothing — not even the numbers you type.