# Invoices straight from the booking

> VAT invoices issued from bookings, with correcting invoices, a register and national e-invoicing such as KSeF in Poland, inside your own booking system.

Page: https://timerise.ai/features/invoicing

A booking feature Timerise builds into custom booking systems its clients own. One fixed project price, typically $15,000 to $50,000, with this feature part of it. Last updated: 2026-10-20.

Your accountant retypes every booking into another program. We build invoicing into your booking system: VAT invoices from each sale, corrections, a register and e-invoicing where the law asks for it.

What goes wrong without it:
- Business customers want an invoice for every booking. Someone copies the data by hand, and mistakes reach the tax office.
- E-invoicing laws, such as KSeF in Poland, make a separate invoicing tool one more system to connect.

How we build it, to the client's rules:
- Invoice from a booking: A VAT invoice issued when the booking is paid, with the customer's company details from the booking form.
- Numbering and corrections: Gapless numbers per series and year, correcting invoices and a register for your accountant.
- National e-invoicing: Invoices sent to Poland's KSeF and similar systems, with receipts kept beside each invoice.
- Your accounting tool: Invoices exported to the accounting program you already use.

Compared with a SaaS tool:
- Work. In a SaaS tool: Invoices issued in a separate tool, by hand. In your own system: Issued from the booking, with no retyping.
- Law. In a SaaS tool: E-invoicing waits for the platform to support your country. In your own system: Built for the rules where you operate.

Agent Skills that build it:
- /skills/invoicing
- /skills/ksef

Industries that use it:
- Booking systems for coworking spaces (/industries/coworking)
- Booking systems for shooting ranges (/industries/shooting-ranges)
- Booking systems for clinics (/industries/clinics)

FAQ:
- Q: Do you support KSeF?
  A: Yes. We build KSeF e-invoicing for Polish businesses into the booking system, with the same module your developers can use as an Agent Skill.
- Q: What does this feature add to the price?
  A: It is part of the one fixed price for your system, and you see it in the quote before the build starts. Most projects cost $15,000 to $50,000 in total, paid once, with no subscription and no commission on bookings.
- Q: Can you add it to a system we already run?
  A: Yes. We build it into a new system or into the one you already run, with its own quote. When the feature has an Agent Skill, your own developers can also build it with the skill.
- Q: Who owns the code?
  A: You do. The code, the data and the documentation are handed over, and the system runs in your cloud account or on ours. Every project includes 3 years of support.

Often built together:
- Deposits and online payments (/features/deposits-and-payments)
- CRM, ERP and API integrations (/features/integrations)
- Memberships and passes (/features/memberships-and-passes)

All features: /features. Start with a free brief: /brief.