Cash vs. Accrual VAT for Your GmbH 2026: Which Method Saves Liquidity?

When does VAT actually become due — when you issue the invoice, or when the customer pays? Every GmbH in Germany has to make this call once, and it directly shapes your cash flow. Picking between cash-basis taxation (IST-Versteuerung) and accrual taxation (SOLL-Versteuerung) can save five-figure amounts of working capital if your customers pay on terms.

Cash vs. accrual VAT in one sentence

Under accrual VAT (SOLL), you owe VAT to the tax office as soon as you issue the invoice — even if the customer hasn't paid yet. Under cash-basis VAT (IST), VAT only becomes due once the money lands in your account. The default for a GmbH is accrual; cash-basis is a relief under §20 UStG that you have to apply for at the Finanzamt.

Who can switch to cash-basis VAT in 2026?

The Wachstumschancengesetz raised the threshold in 2024. Your GmbH qualifies for cash-basis VAT if:

• Total revenue in the previous calendar year was below €800,000, or
• the GmbH is exempt from bookkeeping obligations (in practice rarely the case for a GmbH, since §238 HGB requires double-entry accounting).

If you cross the threshold, you switch back to accrual the following year. Freelancers under §18 EStG can use cash-basis regardless of revenue — but only as individuals, not as a GmbH.

The real reason to choose IST: liquidity

The cash-flow benefit is straightforward. Example: a UG issues a January invoice for €119,000 (€100,000 + 19% VAT) with 60-day payment terms.

• Accrual: €19,000 VAT is due in February (or March with a filing extension) — even though the customer pays in March.
• Cash-basis: VAT only becomes due after the money is received.

On bad debts you also don't have to claw back VAT — it never became due in the first place. If you operate on long terms or have occasional defaults, the savings are tangible. Combined with the VAT filing extension, you can push deadlines a full month further.

Input VAT stays on accrual logic

Important nuance: cash-basis only applies to your output invoices. Input VAT on supplier invoices can still be claimed as soon as the invoice is in hand and the service has been delivered — regardless of whether you've paid yet. Input and output VAT effectively decouple, which improves cash flow further.

When accrual still makes sense

Not every small GmbH has to switch. Accrual can be the better default if:

• Most customers pay by direct debit or upfront — there's no liquidity gap to bridge.
• You'd rather avoid the additional reconciliation work between invoices issued and payments received.
• You'll cross the €800,000 threshold this year anyway and want to skip a forced switch in the next one.

Application and switching mechanics

Applying for cash-basis VAT is a free-form letter to your local Finanzamt. The key rules in 2026:

• Submit the application before the start of the calendar year for which IST should apply.
• Approval comes either in writing or implicitly (the Finanzamt simply accepts your VAT returns under IST).
• If you cross the €800,000 mark, you're automatically back on accrual the next year.

Impact on your VAT return and bookkeeping

Either way, you still file the VAT return for your GmbH on time. Under cash-basis, you record VAT from payments actually received; under accrual, from invoices issued in the period. Modern AI bookkeeping software applies the right method automatically, posts bank-feed payments with the correct VAT date, and produces the right VAT return — without you tracking it manually.

Conclusion: cash-basis is the default for most small GmbHs

If your GmbH stays under €800,000 in revenue and works with payment terms, switching to cash-basis VAT almost always pays off. The cash-flow advantage is real, the operational overhead is minimal — provided you use the right tools. If you already run GmbH bookkeeping in a structured way, the application is a few clicks away and you free up working capital from year one.

With Norman as your tax and accounting platform for the GmbH, the VAT calculation adapts to your chosen method automatically — you keep full control over liquidity and deadlines.