With a regular one-person/ensemble commission, half of the commission fee is due upon signing the agreement and second half is due once the piece is delivered. However, I’ve done things a few different ways with consortium commissions. I’ve found that the best way to do this is to set the first payment deadline to coincide with the deadline for new consortium members to join. The final payment and delivery deadline is the same as a standard commission. Lastly, getting the full portion of each member’s fee when they join saves a lot of headache down the road. That way, you’re not trying to get a second payment from each person when the final deadline approaches.