Reporting form vs. completed value: picking the builder's risk coverage basis
Most builder's risk submissions land on your desk already built one of two ways, and which one it is changes how you watch the file for the rest of the policy term.
Completed value form: one number, set early
A completed value form sets the limit at the project's anticipated full completed value as of inception. That number gets declared once, maybe revised by endorsement if scope changes materially, and premium is computed up front against it. The insured carries full limit from the first day of construction even though the value at risk in month one is a fraction of what's at risk in month ten. It's simple to administer. Nobody owes monthly reports, and you don't lean on the insured's paperwork to know what's exposed. The trade-off is that the insured is often paying for exposure that doesn't exist yet, and you're carrying a full limit on a site that's still a cleared lot.
Reporting form: limit and premium follow the job
A reporting form endorsement ties the limit, and ultimately the premium, to monthly statements of value the insured submits, usually the value of work in place as of each reporting date. Premium is often provisional at binding, adjusted at expiration against the sum of reported values, sometimes with a deposit and a minimum earned. Most of these forms carry a reporting condition: an accuracy threshold, a penalty for under-reporting, and a grace period before a missed or late report lets the carrier treat recovery as capped at the last value on file.
Done well, it's the more equitable basis for a course of construction risk. The insured only pays for what's actually standing, and the limit grows with the structure. Done loosely, it hands the whole exposure read to the one party with the least incentive to flag a problem early. The monthly report is a field the GC or developer fills in, and a report that says 40% complete when the slab is barely poured usually doesn't get caught until there's a loss and the adjuster is standing on site asking why the stated value doesn't match what's there.
Where the two bases diverge at claim time
At loss, a completed value policy pays actual cash value or replacement cost up to the flat limit regardless of what was reported, because nothing was reported under that form. A reporting form policy's recovery is pegged to the last value on file. If the insured under-reported for three months before a fire, the claim can come back capped or coinsurance-penalized against the stated value, which may be well below the true value at time of loss. That's the underwriting reason a reporting form book needs a check beyond the endorsement language sitting in the file: confirmation that the reported percentage of completion matches the visible progress on the ground.
Carriers writing reporting form course of construction risk usually build some version of that check in already, a site visit cadence, photos requested from the insured, an engineer's inspection on the larger jobs. All of it still runs through someone telling you what's there. Builder's Risk Monitor comes at the same problem from outside the file: a monthly read of stage of completion and footprint change pulled from repeat high-resolution imagery, delivered as a site-map overlay you can file next to the insured's reported values before you sign off on the month.
If you're underwriting a reporting form book and want a read on completion that doesn't start with the insured's own number, that's the gap this is built to close.