JEEKSSHIRE 24 | Legal

Invoice

Need to invoice a client under a contract or for a one-off job? List the items, quantities, prices, currency and tax treatment — the AI will write the invoice text with the parties' details, and the table of amounts and the total will be calculated by code strictly from your figures.

Draft yours in Legal ↗

What the AI asks for an invoice

First the assistant asks which document you need: an ordinary payment invoice or a tax invoice under your country's rules. It then collects the seller and buyer with their details, the line items with the quantity and price of each, the currency, the seller's tax status, whether tax is included in the price and which rate applies — including an explicit 0% — and the date, number and payment terms. Details from saved party profiles are inserted word for word, and the contract the invoice is issued under can be selected in the “Basis document” field. Before drafting, Legal looks up the selected country's requirements for invoicing, tax and payment on official portals.

The calculation is done by code, not by the model

The figures in the invoice table are not generated by a language model. The AI only matches each line to your words: quantity, price, currency and tax rate must appear verbatim in your messages or in the selected party details. The code then calculates in whole numbers, without floating-point errors: the net amount, tax and total for each line and the grand total to the precision of the currency — for example, with no decimals for the yen. Three modes are supported: tax added on top of the price, tax included in the price and no tax charged; up to 50 lines. If even one value is not confirmed by your data, the invoice is not calculated and the assistant asks you to clarify the items, currency and rate.

Payment invoice and tax invoice

A payment invoice asks the buyer to pay for goods or services to the stated account. In many countries a separate document with mandatory details is required for tax purposes. The assistant takes this difference into account and does not promise a full tax invoice until its mandatory details are confirmed. If no tax is charged, the invoice says exactly that — “no tax charged”, not “0% rate”; the ground for exemption remains a field to fill in if you did not name it. The finished draft with the table opens in the editor, where you can sign it and save it as PDF, DOCX and other formats.

Sample invoice structure

This is how the draft is structured. The line-item table is added by code after the calculation; the figures below show the format and are not real data.

Invoice No. [FILL IN: number] dated [FILL IN: date]
Seller (payee): [FILL IN: name], [FILL IN: registration and tax number], [FILL IN: address]; bank details: [FILL IN: bank, account, bank code]
Buyer (payer): [FILL IN: name], [FILL IN: details]
Basis: [FILL IN: contract, its number and date] or [FILL IN: order description]
Table: Description · Qty · Price · Tax · Net · Tax · Total — for each line, plus a “Total” row
Sample line with tax added on top: “Website mock-up design · 2 · 500.00 · 20% · 1000.00 · 200.00 · 1200.00”
If no tax is charged, the “Tax” column says “Not charged”, and the ground for exemption is a [FILL IN: ground] field
Payment due: [FILL IN: deadline]; payment reference: [FILL IN: text]
Seller's signature and any other details required by the country's law

Required invoice details

Requirements for an invoice, and especially for a tax invoice, depend on the country and the seller's status. People usually check:

Invoice number and date
Name, address and registration details of the seller and the buyer
The seller's tax number and, for a tax invoice, the buyer's too, if the law requires it
List of goods or services, quantity and unit price
Invoice currency and, where needed, the conversion method
Tax treatment: tax on top, included in the price or not charged, with the ground stated
Amount due, bank details and payment deadline
Reference to the contract or order, if payment is made under a contract

Common invoice mistakes

The total was calculated by hand, and the line amounts do not add up to the total or the tax.
It is not stated whether tax is included in the price — the parties read the amount due differently.
A tax exemption is shown as a “0% rate”, although these are different regimes with different consequences.
An ordinary invoice is issued where the law requires a tax invoice with specific details.
The currency is missing or shown with a symbol shared by several currencies, such as “$”.
A mistake in the bank details — the payment goes to the wrong account or bounces.
The invoice includes items that are not in the contract, or prices differ from those agreed.

Limitations

Creating an invoice with a search for requirements is available on Plus ($5 per month) and Pro ($10 per month). The coded calculation rules out the model's arithmetic errors but does not check whether the rate and tax treatment were chosen correctly — that is for you or your accountant to decide. Legal does not send invoices through banks or payment systems, does not submit them to tax authorities and does not promise that the document will be accepted as a tax invoice without checking the mandatory details under your country's law.

Check the invoice and the contract before paying

Received an invoice from a supplier? Open it in the Legal editor — PDFs and scans are recognised — and compare the items, prices and details with the contract. The contract the invoice is issued under can itself be reviewed with AI: choose your side — “Customer” or “Buyer” — and Legal will find the terms on advance payment, payment deadlines, penalties and refunds, quote the clauses, compare them with provisions from official sources and suggest draft edits.

Review the contract before paying ↗

Questions about invoices

Why doesn't the AI calculate the amounts itself?

Language models can make arithmetic mistakes, so in Legal the amounts, tax and total are calculated by code. The model only carries the quantity, price and rate over from your messages, and each value is checked against your verbatim quote.

Which currencies are supported?

Currencies with a three-letter ISO 4217 code — for example USD, EUR, GBP, AED, KZT or CNY. The number of decimal places follows the currency standard. To avoid extra questions, state the currency code explicitly.

How do I issue an invoice without tax?

Say plainly that no tax is charged and give a 0% rate — it is needed for the calculation. The invoice text will say “no tax charged”, not “0% rate”; the ground for exemption remains a field to fill in if you did not name it.

Can I create a tax invoice?

The assistant will clarify the document type and look up the mandatory details on official portals of the selected country. It does not promise a full tax invoice: unconfirmed mandatory details remain [FILL IN: …] fields, and the limitations are listed separately.

How many line items can I add?

Up to 50 lines per invoice. Each needs a description, quantity, price and tax rate; quantity can have up to four decimal places, and the price follows the precision of the currency.

What happens if I don't give a price or currency?

The table is not calculated: a note appears in the draft's limitations, and the “Needs to be completed” list includes an item on the lines and calculation. The assistant will ask for the items, quantity, price, currency, rate and whether tax is included.

Can I invoice under a contract I already drafted?

Yes. Select the contract in the “Basis document” field or continue the same conversation. You still confirm the items and prices in your own words: the calculation takes values only from your messages and the selected party details.

What format can I save the invoice in?

The draft with the table opens in the editor, where you can amend it, sign it and save it as PDF, DOCX, ODT, RTF, HTML, MD or TXT.

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