The effective day rate is the rate actually payable after rebates, expenses and weighting across the planned team mix — as distinct from the list rate per level.
Calculation. List rate less rebates, plus expenses, weighted by planned days per level.
Why list rates mislead. A junior-heavy mix at a low rate can plan more days and cost more overall than an experienced team at a higher rate.
What to request. Rate per level, planned days, delivery location, rebate tiers, expense policy, validity period.
After award. Fix the agreed team mix in the contract and track it.