okELSTER 2026: Your Tax Return in One Click - What the State Fills In and What You Had Better Not Forget

What okELSTER actually does

From 1 July 2026, the MeinELSTER+ app provides registered users with a finished draft return for the 2025 tax year. It also offers a preview of the tax assessment. A single click on "OK" is enough - the return goes to the tax office and the assessment follows promptly.

The system is a further development of the pre-filled tax return (vorausgefuellte Steuererklaerung, VaSt), which has existed since January 2014 as a document retrieval service. The decisive difference: with VaSt, the data had to be transferred manually in a software package or in the ELSTER portal. With okELSTER you are presented with the finished product.

Data the tax office feeds in

From the reporting obligations of employers, insurers and social-security bodies, the tax office already holds:

• Wage tax certificate (employer)
• Pension payments (Deutsche Rentenversicherung and private pension funds)
• Contributions to health and care insurance
• Pension provision contributions for Riester and Ruerup
• Wage-replacement benefits (short-time work allowance, unemployment benefit I)
• Master data and church-tax characteristic

Data that is structurally missing

The tax office does not know what nobody reports:

• Travel costs beyond the commuting flat rate (§ 9 Abs. 1 Nr. 4 EStG)
• Home-office flat rate, training costs, work clothing, union dues
• Aussergewoehnliche Belastungen under § 33 EStG: medical costs, care costs, disability-related costs
• Donations
• Handwerkerleistungen and household-related services under § 35a EStG
• Doppelte Haushaltsfuehrung
• Riester favourability check (allowance versus special-expense deduction) given complete data

Anyone who clicks "OK" automatically waives everything they have not actively entered. And that operates as the deliberate design of the system rather than a fault in it.

Who is eligible in phase 1 - and who is not

okELSTER starts deliberately small. From 1 July 2026, the following are eligible at first:

• Single, childless employees
• Recipients of retirement income with no further income (in particular without rental income)

Prerequisite: a valid ELSTER account and the MeinELSTER+ app on the smartphone.

Not eligible in phase 1 are:

• Married couples and registered civil partners
• Parents and all persons with a child allowance
• The self-employed, freelancers and tradespeople
• Persons with rental income or capital gains above the exemption order
• Persons with foreign income

The states speak of around 11.5 million taxpayers nationwide who qualify in phase 1. Whether and when the group will be widened remains open. The joint press release of 30 March 2026 speaks of "step by step" but names no timeline for married couples, parents or landlords.

Signal effect: the first genuine federal project in assessment

okELSTER is more than an app function. It is the first assessment project that takes the step from mere data retrieval to a full pre-assessment. Four finance ministers communicate in unison - a political signal that the states are capable of acting within the KONSENS procedure. That is new.

It matters, though, what okELSTER is not: it withholds the automatic assessment seen in Austria, where the tax office assesses automatically without the taxpayer having to act. In Germany the responsibility stays with the taxpayer. The click on "OK" is a declaration within the meaning of the Abgabenordnung (Fiscal Code, AO). That is the legal anchor on which many later conflicts will turn.

Opportunities - what genuinely improves

Three effects are realistic:

Faster assessments. In 2025 Baden-Wuerttemberg had an average processing time of 45 days per income-tax return. okELSTER is meant to lower this figure further, because the tax office already holds the data in full. Concrete service commitments have not yet been published.

Lower-threshold access. Above all young singles who have so far filed no tax return at all are likely to benefit - provided they have no deductible items to claim. With a pure wage-tax standard situation, okELSTER can indeed produce a refund.

Reduction of administrative effort. For both the tax offices and the taxpayers. Anyone with nothing to optimise saves an hour of clicking.

Risks - where taxpayer protection structurally ends

At this point the article turns critical. Three legal pillars carry the advisory warning.

Pillar 1: § 88 AO runs empty

The Fiscal Code obliges the tax office under § 88 Abs. 1 AO to establish the facts of its own motion. Verbatim: "In doing so it must take into account all circumstances relevant to the individual case, including those favourable to the parties." That is the principle of official investigation, and in principle it operates in the taxpayer's favour as well.

In automated assessment via okELSTER, this duty is barely achievable in technical terms. The tax office can only check what has been reported to it. An aussergewoehnliche Belastung of EUR 8,000 after a costly dental treatment is seen by no one. A home-office flat rate for three days a week is unknown to the system. A doppelte Haushaltsfuehrung from weekend commuting to Hamburg stays invisible. In exactly these cases - that is, in almost all the interesting ones - § 88 AO runs empty.

§ 88 Abs. 5 AO permits risk-management systems. The selection logic of these systems works by risk criteria, though - and a risk, in legal terms, is always the possibility of a tax shortfall. Risk management protects the treasury, while it leaves the taxpayer unprotected against their own omissions.

Pillar 2: § 173 AO - the Bestandskraft trap

Here lies the most dangerous conflict. Anyone who clicks "OK" files a complete tax return. The assessment follows, and with it begins the one-month objection deadline under § 347 AO. Once that deadline expires, the assessment becomes final (Bestandskraft).

A subsequent change in the taxpayer's favour is then only possible via § 173 Abs. 1 Nr. 2 AO - and only where "no gross fault attaches to them for the facts or evidence becoming known only later".

This is exactly where the problem lies. The case law of the Federal Fiscal Court (Bundesfinanzhof, BFH) on the electronic tax return is stable: anyone who knew of a deduction item, or with reasonable care should have known of it, but failed to enter it, is regularly charged with gross fault. The okELSTER preview contains a note that further data can be added. Anyone who ignores the note has a poor legal starting position.

Concrete example: in 2025 you paid EUR 8,000 privately for dental treatment. In July 2026 you confirm okELSTER without this item. The assessment arrives in August, and the objection deadline ends in September. In November the receipts catch your eye and you realise: these would have been aussergewoehnliche Belastungen under § 33 EStG - minus the reasonable burden, but still a four-figure tax benefit. A change under § 173 AO regularly fails on the fault threshold. The benefit is gone.

Pillar 3: what is structurally missing

An incomplete but typical list of items that fall by the wayside in an okELSTER standard return without active intervention:

Each of these items can produce three- to four-figure tax benefits depending on the income situation. They are not exotic. They are the everyday substance of any well-considered return. And they are all missing from the okELSTER standard logic.

Sidebar: what this means for the tech sector

The German tax-software market is fragmented. WISO Steuer and CHECK24 led the Stiftung Warentest rating in 2026 with 95 percent each. Taxfix and Wundertax serve the mobile-first segment. Smartsteuer belongs to the Haufe group. Buhl stands behind WISO.

okELSTER hits these market participants to differing degrees. Taxfix and Wundertax live off the simple-case mass market - exactly the target group that okELSTER addresses in phase 1. For them the core business will thin out over the medium term. WISO, Smartsteuer and Buhl cover more complex cases and also serve tax-advisor workflows; they are less affected. Notable is the professional response of the Haufe group, which reported on okELSTER in a sober and neutral way in its online editorial section on 16 February 2026 - with neither panic nor trivialisation.

For the Steuerberater (German tax advisor) profession, okELSTER poses no short-term competition. The phase-1 target group is not the typical boutique clientele. Anyone advising on wealth, succession and structuring never sees these clients in any case. It becomes interesting over the medium term once okELSTER is extended to families with children or to landlords. That is when the comparison between machine and human begins - and that is where the arguments set out in the three pillars above grow sharper.

The uncomfortable truth: audits do not run in the taxpayer's favour

The structural logic of the German tax procedure is asymmetric. The tax office checks whether you have paid too little tax. The tax office does not check whether you have paid too much - at least not systematically. § 88 Abs. 1 AO does require consideration of tax-reducing circumstances, but only those that lie in the files or are submitted in the procedure.

okELSTER entrenches this asymmetry. Anyone who waves the proposal through accepts the treasury's view - and only that view. There is no automatic plea for the taxpayer. There is no algorithm that asks "Do you actually have care costs? A doppelte Haushaltsfuehrung? A Riester favourability check outside the standard routine?" Those questions are asked only by someone who knows your life situation - or by you yourself, if you know your way around.

This is the real point of this article: a pre-filled tax return amounts to a pre-filled view of the treasury. It is not wrong. It is merely incomplete in a way that always operates in one direction - to your detriment.

When okELSTER fits you - and when it does not

An honest recommendation:

okELSTER can fit if you:

• Are single, childless and employed full-time
• Have no relevant Werbungskosten above EUR 1,230
• Have no aussergewoehnliche Belastungen, no tradesperson invoices, no donations
• Have no doppelte Haushaltsfuehrung, no training courses
• Have no optimisable Riester contract
• Have so far filed no tax return

okELSTER does not fit if you:

• Own a property (including an owner-occupied one)
• Are a landlord
• Have children or maintenance obligations
• Claim relevant care costs, medical costs or disability allowances
• Make larger donations
• Work in a structuring-oriented way (inheritance planning, lifetime gifts, holding structures)
• Are self-employed or work as a freelancer
• Are a client of a boutique tax practice like my firm - in which case the click on "OK" equals the waiver of everything you instructed me to do

What advice delivers that okELSTER structurally cannot

The value of a Steuerberater lies somewhere other than in filling in forms. That was never the point - and ELSTER itself has largely taken that over since 2014. The value lies in two phases that okELSTER by definition does not cover:

Phase 1 - structuring before the tax year. What can be arranged in advance so that the tax burden falls? Lifetime gifts with Niessbrauch (usufruct under § 1030 BGB - the right to use and draw income from property without owning it), holding structures, elections in the assessment, Riester optimisation, relocation planning, Pflichtteil strategies. These decisions have to be taken before 31 December. okELSTER begins in July of the following year.

Phase 2 - enforcement of rights after the assessment. What can still be lifted once the assessment is there? Objection, application for amendment, suspension of enforcement, court action. These steps demand knowledge of the norms, the files and the case law. An app does not deliver that.

Anyone with no need in either of these two phases can use okELSTER with a clear conscience. Anyone with a need, or who suspects one, should have it checked before the click what they are about to forfeit.

Conclusion

okELSTER is a sensible function for a clearly defined standard situation. It lowers the hurdle of filing a tax return at all. That is a genuine gain for taxpayers who, out of fear of complexity, have so far done nothing.

For everyone building wealth, owning a property, raising a family or planning a succession, the honest answer is simpler: the one-click logic suits life models without optimisation potential. Anyone with substance has optimisation potential - and the click without review is then an expensive convenience. The Bestandskraft trap of § 173 AO waits in the background.

The system is good. The only question is whether it fits your life situation.

Unsure whether okELSTER fits your situation?

In an initial consultation we clarify in 30 minutes which items in your tax return hold optimisation potential - and whether okELSTER is an option for you or a trap. It works as a concrete assessment of your situation rather than a standard chat.

Arrange an initial consultation

A second opinion on an assessment that has already been issued, or on a planned structure, is often sensible. More on this in the guide Steuerberater second opinion: when it pays off.

Sources and further norms

• § 88 AO (principle of official investigation)
• § 173 AO (revocation or amendment of tax assessments)
• § 347 AO (objection deadline)
• § 9 EStG (Werbungskosten)
• § 33 EStG (aussergewoehnliche Belastungen)
• § 35a EStG (household-related services and Handwerkerleistungen)
• § 10a EStG (Riester special-expense deduction)
• Press release, Ministry of Finance Baden-Wuerttemberg, 30.03.2026 (okELSTER registration start)
• Press release, Ministry of Finance Baden-Wuerttemberg, 13.02.2026 (first okELSTER announcement)
• Press release, Lower Saxony Ministry of Finance, 30.03.2026 (11.5 million users nationwide)
• Haufe online editorial section, 16.02.2026 (okELSTER market classification)
• Act on the Modernisation of the Taxation Procedure of 18.07.2016 (legal basis for the VaSt extension)