Document-to-Journal-Entry Extractor: Turn Invoices and Receipts into Drafted Entries
Upload an invoice, receipt, or statement; AI reads the vendor, date, amounts, and tax and drafts a balanced journal entry — then you check it against the image and approve before it posts.
A web tool where you upload a document, AI extracts the vendor, date, amount, and tax and drafts a balanced journal entry, you verify every field side-by-side with the original image and correct anything wrong, then approve — and it exports a GL-format CSV with the source document kept attached as audit support.
Before you start
- A Supabase account (free)
- A Vercel account (free)
- A Resend account (free)
- An AI vision API key (Anthropic Claude or OpenAI)
- Your chart of accounts as a CSV and your vendor-to-account default rules
- A handful of sample invoices/receipts/statements (PDF or image) to test with
- Claude Code or any AI coding agent
The problem this kills
Every paper invoice, PDF receipt, and bank statement that lands in your inbox eventually has to become a journal entry — and right now that means a human reading the document, typing the vendor, squinting at the total and the tax line, picking the right accounts, and making sure debits equal credits. Do that a few hundred times a month and it's not just slow; it's where the typos, the wrong-account postings, and the quietly unbalanced entries creep in. Worst of all, when an auditor later asks "what's this entry for?", the supporting document is sitting in some folder nobody can find.
The reading and the math are exactly the kind of work software is good at. What software is not allowed to do is post to your books without a human looking at it — a bookkeeper has to verify the numbers against the actual document and own the decision. So the goal isn't to automate the bookkeeper away. It's to do the tedious 80% — read the document, pull the fields, draft a balanced entry, suggest the accounts — and hand a careful human a clean draft to check and approve. You do not need to be a developer to build that.
What you'll build
A simple internal web tool for your bookkeeping team. You upload an invoice, receipt, or statement (image or PDF). AI reads it and extracts the vendor, document date, invoice number, subtotal, tax, total, and any line items, with a confidence score on each field. Using your chart of accounts and your vendor-to-account default rules, it drafts a balanced journal entry — expense lines, a tax line, and the offsetting payable or payment line, with debits equal to credits. Then comes the part that matters: a review screen that shows the original document image side-by-side with the drafted entry, highlights anything the AI was unsure about, and lets you correct fields and accounts. Nothing posts until you click Approve. On approval, the tool exports the entry as a GL-format CSV in your accounting system's exact columns — and keeps the source document attached to the entry as permanent audit support.
What's inside the Implementation Plan
The downloadable plan is a step-by-step file you paste into an AI coding agent. It opens by interviewing you about your business — your current document-to-entry process, the accounting system you post into, the real shape of your chart of accounts and account-numbering scheme, your vendor-to-account default rules, how you handle tax and multi-line documents, your typical and peak document volumes, and the messy edge cases that trip people up. It reads a short spec back to you for a thumbs-up, then builds the tool around your chart of accounts and your rules instead of a generic template. From there it walks the agent through the data model, document upload and storage, the AI extraction with per-field confidence, the balanced-entry drafting logic, the side-by-side review-and-approve screen, the duplicate guard, and the GL CSV export with the document kept attached. Every step ends with a ready-to-copy prompt.
The governance it includes (this is the point)
This isn't a toy. The plan builds in the controls a real finance function needs: login so only your team can use it, row-level security so people only see their own organization's documents and entries, a complete audit trail of every extraction, correction, and approval (who, what, when, and the before-and-after), a hard human-approval gate so nothing is ever posted or exported until a bookkeeper reviews it against the original image and approves, and a duplicate guard so the same vendor + invoice number + amount can't be turned into two entries. Low-confidence extractions are flagged so the human looks harder exactly where the AI was unsure, and the source document stays linked to the entry forever as support. The AI drafts; a person decides and signs.
Who it's for
Bookkeepers, accounting clerks, and controllers who spend hours turning paper and PDFs into journal entries by hand — and anyone who has ever lost an afternoon hunting for the receipt behind an entry. If you can describe how you currently read a document and decide which accounts it hits, you can build this.
You've got this — open the plan, paste the first prompt, and you'll be turning your first real invoice into a drafted, balanced entry this weekend.