Web , Data

Sellantech Invoice

A working invoice studio for consultants. Fill in company, client, and line items, preview the document, then export a PDF or save history when you sign in.

Launch the site

What we delivered

The app at invoice.sellantech.com: live preview, Net 7–60 due-date shortcuts, tax and totals, PDF export, PDF/OCR import, client records, recurring invoices, and a shareable client portal.

The next invoice should be a few clicks from the last one. Company defaults, payment terms, and billing periods sit on the same screen as the draft.

Edit and preview side by side. Required fields are obvious; shortcuts for Net terms and billing periods keep the form from feeling like accounting software.

Next.js, TypeScript, and Supabase for signed-in history. Drafts stay in the browser until you choose to save. Built for consulting invoices, not generic SaaS billing.

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