Tip split Tip on the subtotal or the total, then split the bill so the shares add up. Details Set the tip on the subtotal or on the total, then split the bill. The shares are adjusted so they add up to the bill. The last person absorbs the leftover cent. Category: Business Page: /tools/tip-calculator Text: /tools/tip-calculator.txt Limits Rounding goes to the whole bill, and the last person absorbs the cent difference. Steps 1. Enter subtotal, tax, tip percent, and people. 2. Choose what the tip applies to. 3. Read each share. Questions Why is the last share different? So the shares sum to the bill within one cent. Can I tip on the pre-tax amount? Yes. Choose subtotal. Does it round each person up? No. Optional rounding applies to the whole bill.