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Learn how to use the platform along with some tips and tricks

Set up automatic late fees

Add a rule that charges a late fee automatically once an invoice is overdue, and apply it to your events or to a single invoice.

Updated Sep 28, 2026

A late fee rule set adds a fee to an invoice automatically once it's overdue — you don't have to add one by hand. Set a rule up once, then apply it to a single invoice or to a whole event. Every fee on that invoice — booth, vendor type, vendor tag or category — follows the same rule.

From here you can:

  • Create, edit or delete a rule set
  • Apply a rule set to an event, so every booking invoice for it uses that rule
  • Apply a rule set to a single invoice
  • Review and approve a fee, waive one, or undo a waive

Looking for a one-off fee instead?

This is for a fee that's added automatically. To add a single late fee by hand to one invoice, see Add a late fee to an invoice.

Create a late fee rule set

Only market admins can create, edit or delete a rule set. Any manager can still apply one, and can review or waive the fees it adds.

  1. Open Settings, then Invoicing.

The Settings menu, open to Invoicing

  1. Under Late Fees, click + Add rule set.

The Invoicing page, with Add rule set in the Late Fees card

  1. Give it a Name.
  2. Fill in the Line item name — this is what shows on the vendor's invoice.
  3. Under Steps, set a Start day for the first fee.
  4. Under Charge, choose Flat amount or Percentage.
  5. Fill in the Amount or Percent.

The new rule set form, with the first fee filled in and Add step to add another

  1. Click + Add step to add another fee — for example, one that repeats every 7 days under Repeat.
  2. Under Posts at, choose what time of day new fees are added.
  3. Under Review, choose Automatic to add fees right away, or Review first to approve each one yourself.

The second step repeating every 7 days, with Save ready

  1. Click Save.

The new rule set in the Late Fees list, with Edit and Delete for it

Check your local laws

Late fee laws differ by state and province. Check the laws that apply to you before setting up late fees.

Tip

Cap what a rule set can charge under Amounts and caps. Warn the payer ahead of time with Remind the payer this many days before a fee under Notices and terms.

Edit or delete a rule set

  1. Open Settings, then Invoicing.
  2. Under Late Fees, find the rule set and click Edit or Delete.
  3. If editing, make your changes and click Save.

Note

Editing a rule set changes the fees still to come on every unpaid invoice linked to it. Fees already added to an invoice keep the amount they were charged.

Warning

Deleting a rule set removes its fees from every unpaid invoice linked to it, and removes it from any event series using it. Paid invoices aren't affected.

Apply a rule set to an event

This covers every booking invoice for the event. Booth fees, vendor type fees, vendor tag fees and category fees all land on the same invoice, so one rule set covers them all.

  1. Open Event Configuration, then Events.
  2. Click the event or event series.
  3. On the Basic tab, click the pencil edit icon.

The Basic tab, with the pencil that opens it for editing

  1. Under Invoicing Options, use the Late fee rule set dropdown to choose one.

Invoicing Options, with the Late fee rule set dropdown set and saved

Note

New invoices use the rule set right away. For vendors already booked, open the event's Actions tab and run Re-sync fees to bring their draft invoices onto it. This won't change fees already invoiced.

Apply a rule set to a single invoice

  1. Open the invoice, or click + Add Invoice to create one.
  2. Click Edit in the top right, if you're not already editing it.

The invoice, with Edit in the top right

  1. Under Late fee rule set, choose the rule set you want.
  2. Click Save.

The invoice being edited, with the Late fee rule set chosen and Save ready

Note

You can't change an invoice's rule set once it's paid in full.

Review and approve a late fee

Only needed for a rule set that's set to Review first — an Automatic rule set skips this and adds its fees straight away.

  1. Open Payments, then Late fees.
  2. Click the Pending review tab.
  3. Click Approve next to the fee.

The Pending review tab, with Approve next to the fee

The fee is added to the invoice as soon as you approve it — nothing else to confirm.

Tip

To approve several at once, check the boxes next to them, click Bulk actions, then Approve.

Bulk actions, open to Approve for every checked fee at once

Waive a late fee

  1. Open Payments, then Late fees.
  2. Click the Posted tab.
  3. Click Waive next to the fee.

The Posted tab, with Waive next to the fee

  1. Fill in a Reason.
  2. Click Waive.

Waive late fee, with a reason filled in and Waive ready

The fee comes off the invoice and the vendor no longer owes it.

Note

A fee that's already been paid has to be refunded instead of waived.

Undo a waive

  1. Open Payments, then Late fees.
  2. Click the Waived tab.
  3. Click Unwaive next to the fee.

The Waived tab, with Unwaive next to the fee

  1. Click Unwaive again to confirm.

Unwaive late fee, ready to put the fee back on the invoice

Note

The fee comes back at the amount it was waived at — unless the invoice has since hit its cap, in which case it comes back smaller.

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