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By Alex Diaz · How we calculate this
Tithing isn't a purchase in the usual sense - it's a giving commitment rooted in religious practice, and the traditional 10% figure comes from that tradition rather than from any financial-planning formula. Nothing about it is legally binding the way a mortgage or a car loan is; a household that tithes is choosing to treat a spiritual obligation as a budget line, which is exactly why the decision is worth revisiting on its own terms rather than filed away like a bill you're stuck with.
These key factors affect tithing affordability
Percentage of income and which income it's based on
Ten percent is the customary figure, but nothing enforces it - some traditions teach it as a floor to work toward, others as a fixed rule, and plenty of people who tithe land on a different number for reasons specific to their own household. Gross versus take-home pay is the bigger practical fork: 10% of a $70,000 gross salary is about $583 a month, while 10% of what actually lands in the checking account after taxes is meaningfully less. Pick one basis and stick with it, since switching back and forth between paychecks makes the number impossible to plan around.
Tax deductibility depends on itemizing
Tithes and other charitable gifts are only deductible if you itemize, and the 2017 tax law nearly doubled the standard deduction, which pushed the large majority of filers away from itemizing at all. For most people who tithe, the tax code simply isn't part of the equation, since the giving happens regardless of what ends up on the return. Anyone still itemizing, usually because of a mortgage or an unusually high-earning year, is the exception where the deduction actually moves the math.
Fixed commitment versus flexible giving
A tithe treated like rent - same amount, same day each month - tends to survive a tight stretch better than one calculated from whatever's left over, because leftover money has a habit of reaching zero before it gets there. That said, this is one of the few recurring line items in a budget with no penalty for scaling it back: no late fee, no call from a collector. A household under real strain has more room to adjust the number than the fixed framing suggests, and it's not the same kind of obligation as a bill or a loan payment.
How to use your results
- Decide whether your percentage is based on gross or net income before comparing results month to month.
- If the risk result is high, consider whether a smaller percentage now with room to increase later fits better than pausing entirely.
- Keep a record of gifts over the year in case your overall deductions end up high enough to itemize at tax time.
Ways to make tithing more sustainable
- Base the amount on net income rather than gross if the full 10% of gross doesn't fit your current budget.
- Set it up as an automatic transfer on payday so it's treated like a fixed expense rather than an afterthought.
- Track total annual giving in case it helps you clear the itemizing threshold at tax time.
- Revisit the percentage after any major income change rather than leaving it fixed indefinitely.
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