Defined Benefit contributions for Sole Prop

[Cynchbeast]

Can a Sole Proprietor make a contribution to a defined benefit equal to his entire Schedule C before deduction of s/e taxes and pension contribution? He will end up with a final Net Schedule C of $0

[Bird]

Possibly; depends on having prior comp to base the required contribution on. But the Schedule C does not net to $0 since the pension deduction is taken on the 1040.

[John Feldt ERPA CPC QPA]

Social Secuity tax and/or Medicare Taxes may still apply.

[Calavera]

A Sole Proprietor deducts his contribution on the form 1040 against his earned income. His earned income is Net Schedule C income reduced by 1/2 of SE tax. He also need to have additional room to deduct any other retirement plan contributions (if any) and self-employed health insurance deduction (if any).