I agree with Bird that you need to be sensitive to the plan language, but given that the draws are not actually self-employment income, but rather estimates, or in some cases in effect loans, and given the language of 1.401(k)-1(a)(6)(iii) and (iv), I'd be inclined to think that simply calculating a partner's match based on the number that ends up being his/her self-employment income is not really a true-up. I mean, match formulas usually have two components, a rate (e.g. 50 cents on dollar) and a cap (e.g., 3% of compensation). A true-up is usually more important for the rate (e.g., participant did $0 deferrals for first 6 months, $2,000 per month for second 6 months), than for the cap. You're not giving the partners a break on the rate part, just the comp part, and that seems arguably OK under the cited reg provisions.