Some GCs want a single bottom-line number — no line items, no breakout. A Michigan structural shop used IronKit to generate their lump sum bid format for exactly this scenario. The template provides a detailed scope letter (so you've defined what's included), a tight exclusions list (so the GC can't argue your number covered work it didn't), and a single lump sum price. The backup cost detail stays internal. The shop uses this format for competitive bid situations where showing your full cost breakdown would expose your margin.
Frequently Asked Questions
When should I use lump sum vs. unit price bidding?
Use lump sum when the scope is well-defined, drawings are complete, and you want to protect your margin from line-item scrutiny. Use unit price when quantities are uncertain — pipes per weld, connections per count — where the final scope may vary. Most structural subcontracts are lump sum for predictable scopes.
How do I protect myself on a lump sum bid?
The exclusions list is the key. Define the exact drawing set you're bidding, then explicitly exclude everything the GC might think is included but isn't. If the drawings are incomplete or there are known RFIs outstanding, note that in your qualifications. Cover your basis with a tight scope letter.
Can I switch from lump sum to unit price mid-project?
Only by change order. If the GC adds scope, you're entitled to a change order at your unit prices. Establish your unit rates for likely change categories (per connection, per LF of weld, per delivery trip) in the original qualifications — this makes change order pricing faster and more defensible.
Does IronKit generate both lump sum and unit price formats?
Yes. You choose the bid format when generating. IronKit produces either a detailed BOQ with unit prices or a scope-plus-lump-sum format. The internal cost detail is always available for your records regardless of which format you send the GC.