Should I tithe on my gross income or net income?

This is one of those practical questions that Scripture simply does not address directly, because ancient Israelite farmers were not filling out pay stubs with federal withholding and payroll deductions. When Leviticus commands a tithe of the seed of the land or of the fruit of the trees (Leviticus 27:30), there was no equivalent of taxes taken before the harvest ever reached the farmer's hands. The gross-versus-net question is a genuinely modern dilemma layered onto an ancient command.

That means the answer has to come from principle rather than a direct proof text, and reasonable, faithful Christians land in different places on the specifics.

What Scripture does emphasize repeatedly is the idea of firstfruits, giving God the first and best portion rather than whatever happens to be left over. “Honor the Lord with your wealth and with the firstfruits of all your produce” (Proverbs 3:9). Cain and Abel's offerings illustrate the same principle in reverse: Abel brought the firstborn of his flock and their fat portions, the best he had, while Cain brought merely an offering from the ground, with no indication it was his best (Genesis 4:3-5).

Applied to income, this principle leans toward giving generously and giving first, before other expenses eat into what is available, rather than tithing only on whatever happens to remain after every other obligation is paid.

Many Christians choose to tithe on gross income precisely because it represents genuine firstfruits giving and an act of faith. Tithing before taxes and deductions means trusting God with the fuller picture of what he has provided, not just the portion that survives after the government and other obligations take their share. It also keeps the calculation simple and consistent.

For those who can manage it, gross-income tithing often becomes a spiritual discipline in itself, a regular reminder that everything, including the portion that goes to taxes, ultimately belongs to God, and that giving from the larger number is an act of trust rather than a mathematical inconvenience.

Other sincere believers tithe on net income, reasoning that they never actually receive the withheld portion to give in the first place, and that Scripture's emphasis on giving as he may prosper (1 Corinthians 16:2) points to what is actually realized as income, similar to how ancient tithing was calculated on the harvest actually gathered, not a theoretical projected yield.

This is not a lesser form of giving; someone tithing faithfully on net income, especially while also giving beyond the tithe in other ways, is not failing to honor God. The New Testament simply does not provide enough detail to declare one approach the only faithful one.

For believers who find the gross-versus-net debate genuinely paralyzing, a practical middle path exists: begin giving faithfully at whatever level you can commit to in good conscience now, whether calculated on gross or net, and let that commitment grow over time rather than waiting for perfect theological certainty before giving anything at all.

Many families choose to tithe on net income during a season of tight finances, such as paying off debt or a single-income season with young children, and shift toward gross income tithing as their financial margin increases. This kind of thoughtful, prayerful flexibility honors both the letter of firstfruits giving and the New Testament's emphasis on giving according to what you actually have (2 Corinthians 8:12).

A related question follows quickly behind the gross-versus-net debate: what about a year-end bonus, a birthday check from a grandparent, a tax refund, or an inheritance? These do not fit neatly into either category, since they are not regular wages with predictable withholding. The firstfruits principle again offers the clearest guidance, honor the Lord with your wealth and the firstfruits of all your produce (Proverbs 3:9), a phrase broad enough to cover any increase, not merely a paycheck.

Many believers who tithe faithfully on their regular income choose to apply the same percentage to unexpected windfalls as an act of consistency, treating every increase as coming from God's hand rather than singling out only the predictable portion. If you find yourself instinctively excluding gifts and bonuses from giving while carefully tithing on your salary, it is worth asking honestly whether that reflects real conviction or simply a convenient exception.

The deeper issue is not which number you tithe from but whether you are actually being generous, deliberate, and joyful in your giving, rather than looking for the technical loophole that lets you give the least defensible amount. If you find yourself doing complicated math specifically to minimize what you give, that itself is worth examining prayerfully.

Paul's standard remains the real measuring stick: give as he has decided in his heart, not reluctantly or under compulsion, for God loves a cheerful giver (2 Corinthians 9:7). Pick an approach in good conscience, hold it with an open hand, and let your giving be shaped by trust in God rather than by finding the smallest acceptable figure.