Tithe Calculator — figure your giving amount

A tithe calculator takes the guesswork out of figuring how much to give based on your income, your chosen percentage, and how often you're paid — so you can plan consistent giving instead of estimating it in your head every payday.

This is a straightforward math tool from Arb Digital's free calculator library. It doesn't tell you what percentage to give or how to interpret tithing — that's a matter of personal conviction and faith tradition — it simply does the arithmetic accurately once you've made that decision.

What This Tithe Calculator Does

You enter your income amount, how often you receive it (weekly, biweekly, monthly, or annually), your chosen tithe percentage, and whether you want the calculation based on your gross income or your net take-home pay. The calculator then shows your tithe amount for that pay period, your annualized tithe total, what that works out to per week regardless of your actual pay schedule, and your combined tithe-plus-offering figure if you also give beyond your base percentage. It also shows what percentage of your annual income your total giving represents, which is useful for anyone tracking giving as part of an annual budget or year-end tax planning.

How to Use It

1. Enter your income amount for one pay period — for example, one paycheck, one month, or your full annual salary.
2. Select your income period so the calculator knows whether that figure is weekly, biweekly, monthly, or annual.
3. Enter your tithe percentage. Ten percent is the traditional benchmark, but this field is fully editable to whatever percentage you've chosen.
4. Choose gross or net as your basis. This is a personal decision — see the section below on why this question doesn't have one universal answer.
5. Add any additional offering beyond your base tithe percentage, if applicable.
6. Click "Calculate My Tithe" to see your per-period amount, annual total, weekly equivalent, and percentage of income.

The Formula / How It's Calculated

The core formula is simple: Tithe = Income × (Tithe Percentage ÷ 100). The calculator then annualizes your income based on the period you selected — multiplying weekly income by 52, biweekly by 26, or monthly by 12 — to compute your annual tithe total and a normalized per-week figure, so you can compare giving across different pay schedules on equal footing. The combined figure simply adds your entered offering to your calculated tithe for that period. None of this changes based on tax treatment; it's a straightforward percentage-of-income calculation applied consistently across time periods.

The Gross-vs-Net Question

This is genuinely the most-debated practical question in tithing, and there is no single correct answer — it's a matter of conscience, not arithmetic. Those who tithe on gross income reason that the tithe is meant to be given on the "first fruits," the full amount earned before anything is taken out, treating taxes and deductions the same as any other expense that comes after giving rather than before it. Those who tithe on net, take-home income reason that money withheld for taxes was never theirs to give in the first place, since it never reached their hands, and that tithing on the amount actually available to them is what they can meaningfully commit to giving. Both positions are held sincerely across different faith communities and even within the same congregation. This calculator supports both by letting you toggle the basis, and it's worth simply picking the one that matches your own conviction rather than treating it as a math problem with a hidden right answer.

Consistent Giving Through Automation

One of the most common reasons people's giving becomes inconsistent isn't a change in conviction — it's simply forgetting, or being distracted on the Sunday or the payday when giving would normally happen. Calculating your tithe once per income period and setting up an automatic transfer or recurring donation for that exact amount removes the friction entirely. Many givers find that calculating the figure here, then setting it as a standing transfer that fires the same day their paycheck lands, keeps giving steady through busy seasons, travel, or simply forgetting on a given week — without needing to recalculate or remember each time.

The Tax Deductibility Question

A separate, purely practical question is whether tithes and offerings are tax-deductible. In the United States, donations to a qualified religious organization generally are deductible as charitable contributions — but only if you itemize your deductions on your federal tax return rather than taking the standard deduction. Since the standard deduction was significantly increased in recent years, a large majority of U.S. filers now take the standard deduction and receive no direct tax benefit from itemizing their charitable giving, even though the gift itself is still fully deductible in principle. If you give consistently and itemizing might apply to you, the IRS's own guidance on charitable contribution deductions, available at IRS.gov, is the authoritative source for what qualifies and how to substantiate it, typically with a giving statement from your church or organization.

Tracking Giving Alongside Your Budget

Many people who give consistently treat their tithe as a fixed line item in their monthly budget, the same way they'd treat rent or a loan payment, rather than something calculated and given as an afterthought at the end of the month. Building your tithe into your regular budget planning, alongside categories like groceries and savings, tends to produce more consistent giving than calculating it reactively each time.

Handling Variable Income and Self-Employment

Salaried employees with a predictable paycheck have an easy time running this calculator once and reusing the figure for months. Self-employed people, freelancers, and commission-based earners face a harder version of the same problem: income that changes meaningfully from month to month makes a single fixed tithe amount either unsustainable in lean months or under-committed in strong ones. A common approach among variable-income givers is to calculate and set aside the tithe percentage from each individual payment as it arrives, rather than trying to average an annual figure and pay it out evenly. Running each payment through this calculator as it lands keeps giving proportional to actual income in real time, and the annual total the calculator shows you can serve as a useful check against your full-year giving goal even when individual months vary widely.

Some self-employed givers also choose to calculate their tithe after setting aside estimated taxes and business expenses, treating those as necessary costs of generating the income in the first place, similar in spirit to the gross-versus-net question but applied to business income rather than a paycheck. Again, this is a matter of personal conviction rather than a calculation this tool can resolve for you — it simply applies whichever percentage and basis you've already decided on.

Giving as a Household Decision

For married couples or shared households, gross-versus-net and the percentage itself are often decisions made jointly rather than individually, especially when incomes, tax filing status, or take-home pay differ significantly between partners. Running each partner's income through the calculator separately, then combining the results, can make it easier to see the household's total giving picture and have a concrete number to discuss rather than an abstract percentage that's harder to agree on in the moment.

Common Mistakes to Avoid

• Switching basis inconsistently. Pick gross or net and stick with it period to period, rather than switching based on which number is smaller that month.
• Forgetting bonus or irregular income. If you receive a bonus, freelance payment, or gift, decide in advance whether your tithe percentage applies to it too.
• Assuming tithing automatically reduces your tax bill. It only does if you itemize deductions instead of taking the standard deduction — check with a tax professional if this matters to your filing.
• Not keeping giving records. If you might itemize, ask your organization for an annual giving statement — most maintain these automatically.
• Treating this as a religious authority. This is strictly a calculation tool; the percentage, basis, and whether to tithe at all are personal decisions outside its scope.

Related Free Tools From Arb Digital

Building your tithe into a full spending plan? Try the budget calculator or the grocery budget calculator. Counting cash from a collection or offering? Use the money counter calculator. Splitting a group expense fairly? See the bill splitter calculator or tax and tip calculator. Browse everything in our free online tools hub.

Frequently Asked Questions

This tool provides general estimates for educational purposes only and is not financial, tax, legal, or medical advice. Figures are illustrative; consult a licensed professional for decisions.