01 · Calculator
Dwell Time In.
Accessorial Estimate Out.
The real question is usually simple: how much extra time did the truck lose, and what does that convert to under this agreement? This calculator gives a quick estimate without assuming every contract treats detention and layover the same way.
Results
Estimated payout
The calculator first computes detention beyond free time, then applies the selected layover rule if the dwell threshold has been reached.
Final payout
$375.00
Based on the selected settlement mode
Billable detention hours
5
Rounded from 4.5 excess hours
Detention amount
$375.00
Before any layover replacement or add-on logic
Layover status
Not Yet
Threshold is set at 24 hours of total dwell.
Settlement mode
Replace
Layover handling is based entirely on the contract mode you selected.
Detention charges apply
The load is beyond free time, so detention is being billed based on the selected hourly rate and increment.
Free time used
2 of free time is included before detention begins.
Excess dwell
4.5 hours beyond free time, rounded to 1-hour billing increments.
Layover trigger
Layover activates once total dwell reaches 24 hours.
Important note
Actual detention and layover settlements depend on broker/carrier language, appointment windows, grace periods, proof requirements, and accessorial approval. Use this as a quoting and planning tool, not a final billing determination.
02 · Method
The Estimate Uses
Free Time, Then Contract Logic
The calculator removes free time first, rounds the excess wait into detention billing increments, then checks whether total dwell crosses the layover threshold.
Start With Dwell
Enter the total wait or dwell time tied to the event you are evaluating, not just the portion you expect to bill.
Remove Free Time
Free time is deducted before detention starts. The remaining hours are then rounded to the billing increment used by the agreement.
Apply Layover Rule
Once the dwell threshold is reached, the calculator settles the result based on whether layover replaces detention, adds to it, or is ignored.
03 · Contract Reality
Useful for Planning.
Not Final Settlement.
Detention and layover are documentation-heavy accessorials. The math helps, but the contract and supporting proof still decide whether the invoice gets paid.
Proof Still Matters
In/out times, signed paperwork, gate records, and check-call history often matter just as much as the hours themselves when accessorials are disputed.
Broker Rules Vary
Some agreements replace detention with layover after a threshold. Others allow both. Some require pre-approval. This is why the tool keeps the rule configurable.
Invoice Logic Is Not Universal
Even if the wait time is real, the billed amount can change based on appointment type, missed check-call rules, grace windows, and whether the delay was shipper, receiver, or carrier-caused.
Need Another
Accessorial Tool?
The tools library is growing around freight, dock, and dispatch questions. If you want another accessorial or carrier-cost calculator here, send it through.