Until 31 December to change your tax scheme for 2027
If you want to leave or return to the module system (estimación objetiva) or simplified direct assessment, the deadline to notify it on form 036 is 31 December. The same deadline applies to waiving the simplified VAT scheme or the special scheme for agriculture, livestock and fishing, and to opting for the cash accounting VAT scheme. The changes apply from 1 January 2027.
Who it affects: self-employed people under modules or simplified direct assessment, and businesses and self-employed people who want to use the cash accounting scheme.
Source: Spanish Tax Agency, 2026 taxpayer calendar