Terms and conditions

This is a translation of the German Allgemeine Geschäftsbedingungen. If the two differ, the German version applies. As of 10 November 2026.

§ 1 Scope

These terms apply to all contracts for the use of TaxMaxi between TaxMaxi UG (haftungsbeschränkt), c/o Ast/Onward2, Belforter Str. 9, 10405 Berlin ("we"), and you. Deviating terms apply only if we expressly agree to them. The language of the contract is German.

§ 2 What TaxMaxi provides

TaxMaxi is software in the browser. It reads the public transactions of the wallets you add, on Solana, Ethereum, Base, Arbitrum, Optimism, Polygon and BNB Chain, classifies them by disclosed rules, values them in euros and calculates from them the figures for private sales (§ 23 of the Income Tax Act (EStG)) and other income (§ 22 Nr. 3 EStG) in accordance with the letter of the Federal Ministry of Finance of 6 March 2025. What the rules cannot classify it puts to you as a question. A language model can prepare such questions and propose an answer; it counts only once you confirm it.

TaxMaxi relies on data from third parties: a blockchain service reads the transactions, price services supply the prices. We check this data for plausibility but cannot promise that it is complete and free of errors. Which sources, blockchains and tax years TaxMaxi covers is described by the site at the time of your order.

§ 3 No tax advice

TaxMaxi is software that you use yourself. We do not provide assistance in tax matters within the meaning of the Tax Advisory Act (StBerG), do not examine your individual case and do not replace advice from a tax advisor. Whether and how you use the results in your tax return is for you to decide. The results depend on your answers; check them before you use them and, in case of doubt, consult a tax advisor.

§ 4 Account

You sign in with your email address. An account is for one person. Keep access to your email inbox protected: anyone who reads it can sign in. You must be of full legal age.

§ 5 Conclusion of the contract

The presentation of TaxMaxi on our pages is not yet an offer. You make a binding offer when you press the order button on the payment page; until then you can correct your entries at any time. The contract is concluded when we confirm the order by email or unlock your access, whichever happens first. With the confirmation you receive the content of the contract and these terms by email.

§ 6 Prices and payment

The prices displayed when you order apply. They include statutory VAT. You pay in advance through our payment service provider Stripe using one of the payment methods offered there.

Every account can use TaxMaxi free of charge. TaxMaxi reads your wallets from the first transaction onwards, up to 3,000 transactions in total; later syncs count towards this. For every tax year that is read completely within that, TaxMaxi shows the taxable amount. This does not include the tax report.

A transaction is every transaction of one of your wallets on the blockchain and every entry of a connected exchange account, in the tax year by German time. A transfer between two of your wallets counts for each of the two. Staking rewards that are credited per epoch without a transaction of their own do not count.

You buy the tax report once for each tax year; the purchase does not renew. It comprises the list of every disposal with its acquisition and holding period, the figures for the Anlage SO form, the report as a PDF, the files that go with the report and the year's figures through TaxMaxi's interfaces. If you buy several tax years in one order, every year after the most expensive one costs half its price. The difference for a year that needs a higher tier (see below) is not halved and does not count in this.

The price depends on the number of transactions of the tax year across all wallets of your account, as the order page shows it with the tiers and prices. If the number there is estimated ("about"), the tier you bought applies even if the year is larger after it has been read. If transactions are added later because the year is still running or you add a wallet, and the year therefore needs a higher tier, you pay only the difference to that tier. The report on the transactions you have paid for remains available; you receive the report with the new transactions as soon as you have paid the difference.

For a purchased tax year TaxMaxi reads every wallet of your account from its first transaction to the end of the year, up to 10,000 transactions per wallet. A tax year with more than 10,000 transactions, or with a wallet that has more than 10,000 by its end, is offered only on request; the order page tells you so before the purchase. If it does not yet know a wallet's number before the purchase and it only becomes apparent afterwards that TaxMaxi therefore cannot read the year completely, we refund the order of that year in full on request.

If you ordered a yearly plan or a lifetime plan ("Lifetime") before 10 November 2026, you keep what you bought: a yearly plan comprises a number of transactions that TaxMaxi reads in the contract year across all your wallets, and the reports of all tax years; you can buy additional transactions in packs, which are valid until the end of the contract year. We provide the service per transaction read: each of the transactions included in the yearly plan accounts for the same share of the price. A Lifetime plan is paid for once and comprises, in each contract year, counted from the day the contract was concluded, as many transactions as a yearly plan and the reports of all tax years; each transaction that TaxMaxi reads for it accounts for the share that one transaction accounts for under the yearly plan at the regular price. The free transactions come on top of the included ones.

§ 7 Term and cancellation

The purchase of a tax year is a one-off purchase; it does not continue and does not renew. The purchased tax year stays open in your account for as long as we operate TaxMaxi. If we discontinue TaxMaxi, we will tell you so by email at least three months in advance; until then you can download the reports of the years you bought.

We have not sold a yearly plan since 10 November 2026. We cancel existing yearly plans as of the end of their current contract year; we will tell you so beforehand by email. Until then § 7 applies in the version you received when you ordered. When a yearly plan ends, the reports of the tax years before the calendar year in which it ends stay open in your account, unless we have refunded the price to you; you buy the remaining years as in § 6.

A Lifetime plan runs for as long as we operate TaxMaxi. It does not renew and is not charged again. You can cancel it at any time with immediate effect; in that case there is a refund only under § 8. If we discontinue TaxMaxi, we will tell you so by email at least three months in advance.

You can cancel in your account using the "Cancel contract" button or by email to [email protected]. The right of both sides to terminate for good cause remains unaffected.

§ 8 Right of withdrawal

If you are a consumer, you have a right of withdrawal in accordance with the following instructions.

If you buy the tax report of a tax year, you request with the order that we make it available immediately. Your right of withdrawal then lapses as soon as you download a report of the years purchased: as a PDF, as a file or through TaxMaxi's interfaces, including by an app or an assistant to which you have given access (§ 356 (5) BGB). Looking at a year's tax figure, which TaxMaxi shows free of charge, is not a download.

If you withdraw from a yearly plan after you have requested that performance begin, the share of the service already provided is measured by the number of transactions read up to the withdrawal in proportion to those included in the yearly plan (§ 6). If you withdraw from a Lifetime plan, you pay, for each transaction read up to the withdrawal, the share under § 6.

Independently of your right of withdrawal, we refund every order of tax years in full, as long as you have not downloaded a report of the years purchased in it since that order, by any of the ways named above, and no more than 14 days have passed since it. You arrange this in your account through "Money back", for each order separately. We refund an order only as a whole, to the means of payment you paid with. The years purchased in it close again; a year for which you paid only the difference to a higher tier falls back to the earlier tier. This also applies if you are not a consumer.

For your first yearly plan or Lifetime plan that you ordered before 10 November 2026, the following continues to apply: within 14 days of the conclusion of the contract you can end it in your account through "Cancel contract" with immediate effect and receive the price paid, less the share that under § 6 falls to the transactions read up to then, to the means of payment you paid with. Transaction packs are excluded from this. Your statutory right of withdrawal remains unaffected.

§ 9 Your obligations

Add only wallets that belong to you or for which you are authorised. Answer the questions to the best of your knowledge; the results are based on your answers. You may not query TaxMaxi by automated means, get around limits or use the service in such a way that it is impaired for others.

§ 10 Availability and updates

We operate TaxMaxi with the care that may be expected, but cannot promise uninterrupted availability, for example during maintenance or when a service we rely on fails. During the term we provide the updates that are necessary for TaxMaxi to remain in conformity with the contract (§ 327f BGB). Your statutory rights in the event of defects in digital products (§§ 327 et seq. BGB) remain unaffected.

§ 11 Liability

We are liable without limitation for intent and gross negligence, for injury to life, body or health, under the Product Liability Act (Produkthaftungsgesetz) and to the extent of a guarantee we have given.

In the case of slight negligence we are liable only if we breach an obligation whose fulfilment is what makes the proper performance of the contract possible in the first place and on whose observance you may regularly rely, and then limited to the damage that was foreseeable when the contract was concluded and is typical of the contract. Otherwise our liability for slight negligence is excluded.

We are not liable for the consequences of incorrect or incomplete answers that you give. The above rules also apply to our employees and agents.

§ 12 Changes

If we change these terms, we will notify you of the changes by email at least six weeks before they take effect. For a running contract they apply only if you agree. If you do not agree, both sides can terminate the contract as of the time they take effect; we refund pro rata any fee already paid for the time after that.

§ 13 Final provisions

The law of the Federal Republic of Germany applies, to the exclusion of the UN Convention on Contracts for the International Sale of Goods. If you are a consumer, the mandatory provisions of the state in which you have your habitual residence remain unaffected. If you are a merchant (Kaufmann), the place of jurisdiction is Berlin.

We are neither willing nor obliged to take part in dispute resolution proceedings before a consumer arbitration board.

If a provision of these terms is invalid, the remaining provisions remain valid.