Deferring Taxes with the AEAT in 2026: What Self-Employed Workers and SMEs Can Request

Every summer, once the second-quarter VAT return is filed and the holidays start putting extra strain on cash flow, many self-employed workers and small businesses start wondering whether they can buy themselves some breathing room to pay their taxes. Spain’s Tax Agency (AEAT) still offers the same answer it has in recent years: yes, it’s possible to defer or split a large part of your tax debts into instalments — but only under specific rules that are worth understanding before you apply, not after.

Which taxes can be deferred, and under what conditions

The Tax Agency allows deferral or instalment payment requests for almost all debts arising from periodic self-assessments: VAT (Form 303), fractional personal income tax payments from business activities (Forms 130 or 131), withholdings on employees and professionals (Form 111), and even Corporate Income Tax (Form 200) for SMEs. The standard route for self-employed workers and microbusinesses is a request that doesn’t require any guarantees, as long as the combined debt stays under the threshold set by current regulations — currently 30,000 euros. Above that figure, the AEAT can demand a bank guarantee or surety bond, which in practice makes the whole process considerably harder for small businesses.

One detail that trips people up every year: VAT charged to customers technically shouldn’t be deferrable, since it isn’t your money — it belongs to the client who paid it. Even so, the AEAT does allow deferral of VAT liabilities when the applicant can show, using the return’s own figures, that the invoices generating that VAT haven’t actually been collected yet. It’s a box that many advisors tick automatically, but it deserves a closer look, because a poorly justified request can be turned down outright.

What this means for your business

In practical terms, this translates into some very specific decisions. First: if you’re going to struggle to pay Form 303 or Form 130, it’s far better to request a deferral before the voluntary filing deadline ends — or immediately after, with the reduced surcharge — than to simply leave the debt unpaid and wait for enforcement proceedings, which bring much steeper surcharges and late-payment interest. Second: if your total outstanding debt with the Tax Agency (adding up all pending forms) is approaching 30,000 euros, consider staggering payments or prioritising the settlement of smaller debts before it piles up further, since crossing that threshold triggers guarantee requirements that almost no self-employed worker can meet without help. Third: a deferral isn’t free. It accrues late-payment interest from day one, so it only makes sense if the financing cost of waiting is lower than drawing on a credit line or delaying payment to a supplier. Before requesting one, compare both options with real numbers — not gut feeling.

How to avoid mistakes when requesting a deferral

The process is handled online through the AEAT’s Electronic Office, and requires proposing a payment plan (number of instalments and frequency) along with a bank account for direct debit. The Tax Agency can accept the proposal as is or adjust the instalments based on its own risk assessment, so it pays to be realistic when proposing them: requesting an excessively long timeline for a small debt tends to create more friction than it saves. It’s also important not to stack up successive deferrals without paying off the previous ones, since the AEAT weighs a taxpayer’s compliance history before granting a new one — and a history full of missed payments can result in automatic denial, or in guarantee requirements even below the general threshold.

At Zythos Business, we help self-employed workers and SMEs navigate these tax cash-flow decisions: we review which debts are worth deferring and which are better paid off in full, calculate the real cost of each option, and prepare the request so it reaches the AEAT properly justified from the very first attempt — no surcharges, no avoidable surprises.