Invoice fundamentals
What to Include on an Invoice
A field-by-field invoice checklist, with examples for services and products, so clients can understand what they owe and how to pay.
7 min readUpdated October 3, 2026
BilluApp Resources
Practical guides for getting invoices right
Straightforward help with invoice details, payment expectations, overdue invoices, and India GST invoice checks. These guides are general information; always confirm requirements that apply to your business.
Browse the guides
Start with the question closest to what you need to do.
4 guides
Getting paid
Invoice Payment Terms Explained
Understand due-on-receipt, net terms, deposits, milestones, payment methods, and how to write terms clients can follow.
7 min readUpdated October 3, 2026
Getting paid
How to Follow Up on a Late Invoice
A practical reminder timeline and adaptable email examples for checking invoice receipt, resolving disputes, and requesting payment.
8 min readUpdated October 3, 2026
India tax reference
GST Tax Invoice Checklist for India
A practical checklist based on CBIC invoice rules, including conditional recipient details, tax values, place of supply, and review steps.
9 min readUpdated October 3, 2026
Ready to prepare an invoice?
Use the invoice builder to enter your business and client details, itemize the work, review the totals, and download a PDF. Check the finished invoice before sending it.
Create an invoice