Digital Invoicing
Fast, flexible invoicing refined over a decade — billed straight from the work you've done, with part-payments, statements and two-way Xero sync.
Get paid faster — bill from the work you've actually done.
Stop re-keying details and chasing overdue accounts. Zulu turns a signed-off job, an accepted quote or a product list into a professional invoice in seconds — then tracks every payment through to the bank.
Bill in a click
Create and send professional invoices, convert an accepted quote straight through, or duplicate a recurring one in seconds — with PO and client references.
Smart, stock-aware lines
Auto-fill price, cost and description from a product by SKU — with wholesale tiers, quantity breaks and client-specific pricing flowing onto the line automatically.
Payments your way
Record part-payments and track the balance across card, bank, cash, Stripe, PayPal, Afterpay and more. Invoices lock once paid to protect the audit trail.
Statements & reminders
Send month-end statements, raise credit notes with their own numbering, and set automatic payment reminders before and after the due date.
A clean dashboard for your team — an endpoint for your agent.
Invoicing draws on your CRM (who), Products and Inventory (what, and at what price), and Quotes and Job Cards (the work) — and syncs two-way with Xero, including payment reconciliation. Bill from real events, not retyped data — and it's all live on the API today.
- Create invoices
- Add/update/remove line items
- Pull product pricing into a line
- Read invoice detail and payment status
Talk to Digital Invoicing in code.
# Raise an invoice for a customer POST /invoice { "client": "9f2a…", "client_reference": "Job 318", "lines": [ { "sku": "PUMP-200", "quantity": 2 } ] } → 201 Created { "data": { "token": "inv_7c1…", "status": "draft" } }
# Add another line, then read the payment summary POST /invoice/inv_7c1…/line { "sku": "FILT-9", "quantity": 4 } GET /invoice/inv_7c1… → 200 { "data": { "payment_summary": { "total": 481.85, "paid": 0, "balance": 481.85 } } }
Who gets the most from Digital Invoicing.
Professional services
Turn billable work into a clean invoice and chase less, with reminders and statements running on their own.
Distribution & wholesale
Bill account customers at their tier price, track part-payments, and reconcile high invoice volumes through Xero.
Trades & construction
Invoice on-site from your phone the moment a job is signed off, and share it with the client on the spot.
“Super easy to use — our coaches handle sales before and after class, and it's boosted our revenue.”
F45 Newmarket F45 Newmarket It all runs as one system.
Every Zulu module is part of the same connected platform — that's what makes it more than the sum of its features.
One connected database
Enter a customer, product or job once and it flows everywhere — quotes, invoices, stock, jobs and reports. No double-entry, no exporting between tools.
Grows with you
Switch on more modules as you scale — same login, same data, one simple bill. You only run the parts of Zulu your business actually needs.
One API for all of it
Every module speaks the same documented REST API — so your team and your AI agent work from one source of truth, with no glue code in between.
Run Digital Invoicing on Zulu.
One login, one simple fee, and API access in every plan. Start free — no credit card.