Concurrent Delay Attribution Calculator

Concurrent delays split attribution. This calculator apportions.

Total delay days

Contractor-caused %

Owner-caused %

Daily LD amount

Recoverable LDs

$94,500

Contractor days

Owner/excused days

How the math works

Contractor days = total × contractor %. Recoverable LD = contractor days × daily LD.

45 total delay days, 60% contractor (27 days), 25% owner-excused (11 days). Balance concurrent/force majeure. $3,500 LD × 27 days = $94,500 recoverable. Contractor claims excusable time for 11 days. Disputes often compress to negotiated settlement.

How to Use

Enter total delay days.
Enter contractor-caused %.
Enter owner-caused %.
Enter daily LD amount.
Read recoverable/excused days.

Frequently Asked Questions

Concurrent vs serial?

Serial: contractor delay ends, then owner delay starts (adds). Concurrent: both happen simultaneously (overlap). Serial adds; concurrent only counts once. Determining which requires detailed schedule analysis.

Attribution approach?

Modern: apportion LD and contractor's excusable delay claims. E.g., 70/30 contractor/owner on concurrent days — 30% excused. Old rule: concurrent excused all LDs (modified by most modern contracts). Mixed/varies by jurisdiction and contract.

Documentation?

Detailed daily logs. Subcontractor notices. RFI response times. Inspection schedules. Weather data. Labor/material records. Claims packages run 200-1000+ pages for significant delays. Specialists (delay analyst/scheduler) essential for claims > $100k.

What documentation matters here?

Written leases, move-in/move-out inspections with photographs, ledger entries showing every payment and charge, served notices with proof of service, and contemporaneous emails or texts. Courts weigh written evidence heavily; informal understandings rarely stand. Institutional operators run a monthly file audit to catch gaps before they matter. Good paper trails recover most of what's owed.