Amainvoice or VAT GPT? The comparison for Amazon sellers

Both work with your Amazon data, but they describe different tasks. Amainvoice calls itself accounting software tailored to Amazon sellers: it connects Seller Central to your financial accounting via API and, by its own account, automates the steps from data capture to the DATEV export. VAT GPT imports Amazon and eBay reports, calculates the VAT from them and, with Pro, sends the advance VAT return and other returns via ELSTER as well as the One-Stop Shop (OSS) return to the Federal Central Tax Office (BZSt).

Last updated: 19 October 2026. The information about Amainvoice comes from amainvoice.de and relates to this date; the information about VAT GPT comes from VAT GPT itself.

What Amainvoice can do, according to Amainvoice

Target group: “Amainvoice is 100% tailored to Amazon sellers”.
Connection: Connect the Amazon account to Seller Central via API, “no CSV exports”.
Bookkeeping: Posting batches with charts of accounts such as SKR03 and SKR04 and export to accounting systems such as DATEV; exports for working with the tax adviser.
EU VAT: PAN-EU, CEE, OSS and Intrastat, VAT ID number checks and VAT sales lists per country.
OSS: Amainvoice “calculates the VAT for the correct OSS return” and creates reporting lists for the tax authorities.

What VAT GPT can do

Marketplace reports: Import Amazon and eBay CSV reports and break down the VAT for Germany and the EU (OSS).
Returns: Prepare the advance VAT return (monthly or quarterly) and the annual VAT return and send them via ELSTER with Pro; EÜR (income surplus statement), trade tax and income tax likewise.
OSS: Calculate the OSS return for all EU countries and send it to the BZSt with Pro.
Receipts: Upload invoices, the AI reads amounts, countries and tax rates – you check and confirm.

Amainvoice and VAT GPT side by side

	Amainvoice (according to amainvoice.de)	VAT GPT
Target group	Amazon sellers	Online sellers on Amazon and eBay, self-employed people and small businesses
Data from Amazon	via API with Seller Central, no CSV exports	import Amazon and eBay CSV reports
OSS	calculates the VAT for the OSS return, creates reporting lists	calculate the OSS return and send it directly to the BZSt with Pro
Price	flat €43 per month up to 200 documents, above that €0.24 per document (201 to 1,000 documents, at most €153 per month) and further tiers; the page gives no VAT note; valid from 9 February 2026	Free; Go 30 days free with all Pro features; Pro €49 per month or €444 per year, each including VAT.
Pricing basis	Documents = sum of invoices and cancellation invoices	fixed price per plan: Pro €49 per month or €444 per year

Sources: amainvoice.de (German-language pages; quotes are our translations; retrieved on 19 October 2026) and VAT GPT. The sources are listed at the bottom of this page. The pricing models are not directly comparable: Amainvoice bills by documents, VAT GPT by plan.

When Amainvoice fits

You sell via Amazon FBA and need the EU rules for PAN-EU, CEE, Intrastat and sales lists per country that Amainvoice describes on its site; the VAT GPT feature list does not mention them.
You want ongoing Amazon bookkeeping with posting batches and a DATEV export for your tax firm.
You want to obtain the Amazon data via API rather than via CSV report.

When VAT GPT fits

You want to send the advance VAT return, EÜR, trade tax and income tax yourself via ELSTER with VAT GPT Pro and the OSS return yourself to the BZSt.
You also sell on eBay and have the reports as CSV.
You want a fixed price per plan instead of billing by documents.

How it works with VAT GPT

Upload files: your Amazon or eBay CSV report and your invoices. The AI reads amounts, countries and tax rates.
Check the result: VAT GPT breaks down the VAT for Germany and the EU (OSS) and prepares the advance return and the OSS return. You check and confirm.
Send: with VAT GPT Pro – via ELSTER to the tax office, the OSS return directly to the BZSt.

VAT GPT does the calculating. Everything is in one place: advance VAT return, annual VAT return, OSS return, EÜR, trade tax and income tax returns. With Go you use all Pro features free of charge for 30 days.

What VAT GPT does not do

VAT GPT is not tax advice.
VAT GPT does not prepare corporation tax returns, for example for a GmbH or UG.

What does VAT GPT cost?

Free (basic features, free of charge), Go (30 days free with all Pro features), Pro €49 per month or €444 per year, each including VAT.

Frequently asked questions

What does Amainvoice cost? According to amainvoice.de, a flat €43 per month up to 200 documents, above that tiered by documents; the page gives no VAT note.

What counts as a document at Amainvoice? The sum of invoices and cancellation invoices.

How does Amainvoice get my Amazon data? Via an API connection to Seller Central, without CSV exports.

How does VAT GPT get my Amazon data? You import the Amazon or eBay CSV report.

Do I have to choose between the two? That depends on who does the bookkeeping for you and who sends the returns. Whether the two programs exchange data with each other, we have not checked.

Does VAT GPT send my returns itself? Yes, with Pro: advance VAT return, EÜR, trade tax and income tax via ELSTER, the OSS return to the BZSt.

Does VAT GPT replace my tax adviser? No. VAT GPT is not tax advice.