That sounds rather nosy and legalistics. The laws about tithing don't address the type of income received on a W2, does it? Most of us don't have flocks and crops of Israel reported on our W2s.I was in a PhD program with a Mormon accountant who had some kind of role in their hierarchy. In accounting, you can count things different ways. It doesn't make sense to tithe off the revenue in most cases, and you can stretch your costs out over years and factor in depreciation in different ways. I asked him what kind of tithing Mormon churches expected, and he said they didn't mind that much as long as you tithed in a reasonable way. I'd imagine for a W2, they'd want 10% of take-home or have a specific formula for it. Mormons also have an internal social welfare system