SMF·INVOICE-NINJA
Can a prompt replace Invoice Ninja?
Finance & accounting — invoicing
Exhibit tracking slip
Verdict
Because Invoice Ninja is itself open source, self-hosting the real thing is the honest first option; a lighter personal invoicer with clients, line items, PDF export, and a payment link is also a real weekend build if that's all you actually need. Either way, hosting, backups, and payment configuration become your job.
Exhibit A — The prompt
Received on30.07.2026Note in the README that Invoice Ninja itself is open source and self-hostable — that's the first option worth considering. If a lighter personal tool is genuinely what's needed instead, build a small invoicing app: clients (name, email, address, currency, default rate) and invoices with line items (description, quantity, unit price, tax), auto-numbered sequentially. Generate a clean PDF per invoice from an HTML template, with your logo, payment terms, and bank details pulled from a config file. Email the PDF to the client, track draft/sent/paid status per invoice, and show a dashboard of unpaid invoices sorted by days outstanding. Add an optional payment link per invoice through a payments API, included in both the PDF and the email — mark invoices paid by hand once money actually lands, no automatic reconciliation. Set up a nightly backup of the database to a dated file, keeping a rolling window of recent backups.
Do not build quotes, expense tracking, multi-user access, or a client portal — those are real scope beyond a personal invoicing tool, and Invoice Ninja itself already covers them if that breadth turns out to matter.Opening prefills the prompt — press enter to run it.
Exhibit B — What you lose
- B.1 managed hosting and upgrades handled for you
- B.2 backups run by someone else
- B.3 support if something breaks
- B.4 a client portal
- B.5 easy payment reconciliation across many invoices
Prior art
Exhibit C — Why people still pay: open-source core/hosting/payments
Billing software is boring and it should never break on the day an invoice is due — people pay so the operational risk around getting paid isn't their problem.
Questions
Can I import my existing Invoice Ninja data?
Yes — Invoice Ninja can export clients and invoices, and that data maps cleanly onto a simpler schema like this one. Quotes, expenses, and portal-specific settings don't come across, since this build doesn't have those features.
Will it work on my phone?
The admin pages render on a phone browser for a quick check or a one-off invoice, but this build isn't designed mobile-first the way a dedicated app would be.
What does it cost to run?
Hosting and a database, typically a few dollars a month, plus payment-processor fees only on invoices actually paid through the optional link — no fee at all if you invoice for bank transfer.
What's the one thing that doesn't survive the rebuild?
A client portal. There's nowhere for a client to log in and see their own invoice history here; every invoice is a one-off PDF and email, fine for occasional billing and a real gap for recurring clients.
Related tools
Receipt