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Call workflow: reuse a workflow

6 steps± 4 minVideoVerified 22 Oct 2026
  1. Step 1 · Open Flow and create a workflow
  2. Step 2 · Choose the workflow you call
  3. Step 3 · Pass what it needs
  4. Step 4 · Put the steps in one line and save
  5. Step 5 · Run
  6. Step 6 · Follow the run into the called workflow

What you need more often, you build once: a VAT calculation, a customer check, a standard message. With Call workflow you use such a workflow as one step in another. It runs inside the same run, gets the input you pass, and what it returns with its API response comes back under the name you choose.

Watch the whole guide as a video6 steps in one film
Step 1 / 6

Open Flow and create a workflow

In the portal, under Environments, click Development and there Open; Flow opens in a new tab. There, click ＋ next to General, choose New workflow and give it a name. A new workflow starts with an Event trigger: the point where it begins.

  1. Click Development
Open Flow and create a workflow · Click Development
  1. Click Open ↗
Open Flow and create a workflow · Click Open ↗
  1. Click Add to General
Open Flow and create a workflow · Click Add to General
  1. Click New workflow
Open Flow and create a workflow · Click New workflow
  1. In Workflow name, type Guide · quote with VAT
Open Flow and create a workflow · In Workflow name, type Guide · quote with VAT
Step 2 / 6

Choose the workflow you call

Put an amount in the sample data. Add Call workflow and choose the workflow: here one that calculates the VAT. The step gets its name by itself. You only see workflows from this module, or ones set to Shared.

  1. Click the step ‘Event trigger’
Choose the workflow you call · Click the step ‘Event trigger’
  1. Click Code
Choose the workflow you call · Click Code
  1. In the sample data, type `{
Choose the workflow you call · In the sample data, type `{; ; ;
  1. Click Add node
Choose the workflow you call · Click Add node
  1. Click Call workflow
Choose the workflow you call · Click Call workflow
  1. In Workflow, choose Guide · calculate VAT
Choose the workflow you call · In Workflow, choose Guide · calculate VAT
  1. Click the dot of ‘Event trigger’
Choose the workflow you call · Click the dot of ‘Event trigger’
  1. Click the dot of ‘Guide · calculate VAT’
Choose the workflow you call · Click the dot of ‘Guide · calculate VAT’
Step 3 / 6

Pass what it needs

Under Input you put only what the called workflow needs; empty passes everything. Passing less is safer. Under Store the result as you name the answer: vat.

  1. Click Code
Pass what it needs · Click Code
  1. In the input, type `{
  4. In Store the result as, type vat
Pass what it needs · In the input, type `{; ; ; In Store the result as, type vat
Step 4 / 6

Put the steps in one line and save

Select the steps (click the first, and the others while holding Shift) and click Align horizontally: they then stand in one line and you read the workflow from left to right; a branch (such as No of an If / Else) gets its own row below. Fit to view puts everything in sight; then Save.

  1. Click ‘Event trigger’
Put the steps in one line and save · Click ‘Event trigger’
  1. Click ‘Guide · calculate VAT’ while holding Shift
Put the steps in one line and save · Click ‘Guide · calculate VAT’ while holding Shift
  1. Click Align horizontally
Put the steps in one line and save · Click Align horizontally
  1. Click Fit to view
Put the steps in one line and save · Click Fit to view
  1. Click Save
Put the steps in one line and save · Click Save
Step 5 / 6

Run

At the bottom the steps of the called workflow appear while it runs (marked ↳), and then that the workflow was called. The answer is under vat: 250 euros is 302.50 including VAT.

  1. Click Run
Run · Click Run
Run · Status: Completed.
Run · A step of the called workflow.
Run · The workflow was called.
Run · vat.incl: 302.5.
Step 6 / 6

Follow the run into the called workflow

The Call workflow step shows Open with this run. While the run goes on, it also says which workflow it is in. Click it: the called workflow opens with this run. Its steps light up while they run and are ticked when done; under a step's Output you see what that step had in this run.

  1. Click Open with this run ↗
Follow the run into the called workflow · Click Open with this run ↗
Follow the run into the called workflow · You follow the run inside the called workflow.
Follow the run into the called workflow · ‘VAT’ is ticked.
  1. Click the step ‘VAT’
Follow the run into the called workflow · Click the step ‘VAT’
  1. Click Output
Follow the run into the called workflow · Click Output
Follow the run into the called workflow · incl: 302.5, in this run.

This guide was carried out step by step on 22 Oct 2026 by an automated test on Flow (version 3e563176).