How is Transit Time calculated as a third-party shipping carrier?

Technical Q&A
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Topic summary

Main issue: A shipping carrier asks how Shopify determines the “Transit time” shown for third‑party carrier rates.

Key details:

  • The carrier cannot find any explicit transit-time field they send to Shopify. They suspect Shopify derives it from max_delivery_date and min_delivery_date in the rate response.
  • They could not locate documentation confirming how Shopify computes or displays transit time for third‑party rates.
  • They also ask if the transit-time display (business days until arrival) in the Store admin can be hidden.

Context/terms:

  • min_delivery_date and max_delivery_date are fields carriers can return with rate quotes, indicating earliest and latest estimated delivery dates.
  • “Transit time” appears to be the summarized delivery window shown in Shopify’s admin UI.

Attachments:

  • Screenshots illustrate where “Transit time” appears in the Shopify admin for a carrier rate.

Status:

  • No confirmed answer or documentation cited yet. The question remains open and unresolved.
Summarized with AI on January 3. AI used: gpt-5.
1

How is the Transit time provided by a third-party carrier calculated?

As a Shipping carrier, I couldn´t find any field we provide to shopify that shows the transit time, could it be that Shopify is calculating this field by the max_delivery_date and min_delivery_date fields provided in the shipping rates?

I couldn´t find any information regarding this field in the Shopify documentation.

Also, can this transit time showing the business days in which the order will arrive be hidden in the store admin?

Thank you in advance.

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