How Spanish form 600 is filed

The short answer

Form 600 is the self-assessment return for Spanish transfer tax and stamp duty, and there is not one of them: the law devolves the approval of the form itself to each autonomous community⁵.

Where it is filed is decided by an ordered list, not by a criterion. And the state deadline of thirty working days⁴ is only the one that governs when your region has not set another².

Why the same form exists seventeen times

Transfer tax and stamp duty is a state tax ceded to the autonomous communities, and the cession reaches further than almost anyone explains. Article 55.1 of Act 22/2009 lists what falls to the region in administering this tax, and its point (e) says, with no further qualification, «the approval of declaration forms»⁵.

That is where seventeen identically named forms come from, and they are not the same form. The box numbering differs, the validations in the filing software differ, the portal differs and in several cases the deadline differs. Downloading one region's form to file it with another does not work, however identical the number.

Paragraph 2(a) of the same article closes the circle from the other side, and it is why searching for this online is so frustrating: answering binding rulings is not devolved, except as regards provisions the region itself has enacted⁵. In other words none of those seventeen administrations may answer for another. Each answers for its own and is silent about the rest, which is exactly why the commonest question about this form (I bought in one region and live in another, who do I deal with?) has no official page where it is settled.

Competence is decided in order, not by criterion

Article 103.1 of the regulation says how it is divided, and the first thing to read is the sentence that comes before the rules: they apply «in accordance with the following rules of territorial competence and in the order of preference that results, following their own enumeration»⁴. Article 33.2 of Act 22/2009 repeats the same structure to decide which region keeps the revenue⁵, so the two questions (where you file and who collects) are answered with the same list.

Letter (A). Whenever the deed contains any item subject to the graduated stamp duty charge, the competent office is the one in whose district the Registry lies where it would have to be recorded⁴. That word, «whenever», is what puts this rule ahead of all the others.

Letter (B). If there is no graduated stamp duty and the transaction is corporate, the company's tax domicile governs⁴.

Letter (C). Only failing both does the nature of the asset come in, and there are seven numbered rules plus an eighth tie-breaker.

That order is not a formality. A deed carrying graduated stamp duty is filed where it must be recorded even if the asset sits in another region and the buyer lives in a third. Anyone who starts reasoning from the asset is reading the third letter before the first.

Property goes where it stands; movables go where the buyer lives

Within letter (C), the two rules that cover almost everything a private individual does point in opposite directions.

Rule 1 sends transfers and leases of property, and the creation or assignment of rights in rem over it, «to the territory in which the properties are located», adding that if it refers to several situated in different places, the competent office is the one where the most valuable ones lie⁴.

Rule 3 sends transfers of movable goods, livestock or credits «to the territory where the acquirer has their habitual residence if a natural person or their tax domicile if a legal person»⁴.

The practical consequence is stark and surprises a lot of people: a used car bought in Seville by somebody who lives in Madrid is declared in Madrid, and the flat next door, bought by the same person on the same day, is declared in Seville. The Community of Madrid sets it out on its own page in those same two sentences: filed there are transactions on property located in the community, and transactions on movable goods where the acquirer has their tax domicile there⁸.

It is also worth knowing that for a second-hand vehicle between private individuals almost every region has approved its own return, usually the 620 or the 621, rather than the 600. The number of the form changes; the rule that decides who receives it does not.

Rule 5 does something similar for simple loans, guarantees, non-property leases and annuities, but following the taxpayer rather than the acquirer⁴, who is not always the same person. And rule 8 resolves a deed mixing assets of several classes: the office for the act or contract of greatest value prevails⁴.

Thirty working days, and why a month is less time

Article 102.1 of the regulation gives «thirty working days counted from the moment the act or contract occurs», adding that for judicial documents the act is deemed to occur on the date the decision becomes final⁴.

What working means is set by article 30.2 of Act 39/2015: Saturdays, Sundays and declared holidays are excluded from the count⁶. Saturdays have been excluded since October 2016; under the previous Act they counted, which is why some older guidance still gives an earlier date than the correct one.

Thirty working days are therefore about six calendar weeks. A month counted date to date is four. So a region granting «one month» is granting less time than the state rule, not more, and it is probably the most expensive misunderstanding available around this form.

Article 30.4 explains how a period in months is counted: it ends on the same day of the month of expiry, and if that month has no equivalent day, it expires on the last day of the month⁶. So a deed of 31 January with a one-month period expires on 28 February, the last day that exists.

What changes from one region to the next

Article 56.2 of the consolidated Act lets the regions regulate the administration and assessment of the tax, and finishes with the sentence that decides everything else: «Where the Autonomous Community has not regulated those aspects, the rules laid down in this Act shall apply»². The state deadline is therefore a default.

Checked on 17 September 2026 on the agencies' own pages:

Three things in that table are worth reading slowly.

The first is the spread. On the same deed, the difference between the shortest and the longest period is over a month.

The second is that Andalusia counts from the day after and writes it that way, while Catalonia and Galicia count date to date from the day of the act itself. Andalusia also keeps a different rule for taxable events before 1 January 2022, which remain on thirty working days¹⁰: if what you are regularising is an old transaction, the period that applied to it is not today's.

The third is that Galicia publishes a deadline the state regulation does not distinguish: six months where what is declared is the consolidation of ownership on the death of the usufructuary, counted from the day of death¹¹. Anyone who inherited bare ownership and years later sees the usufructuary die is not in the ordinary case, and does well to check what period their region gives before assuming the general one.

And a warning about the dates any tool will compute, this one included. Article 30.7 instructs each region to publish its own calendar of non-working days, covering also those of the local authorities in its territory⁶. No calculator knows them all. But paragraph 6 turns that gap into a guarantee: where a day is a working day in the municipality or region where the interested party lives and a holiday at the seat of the administrative body, «or the reverse», it is treated as a holiday in any event⁶. A date computed from the national holidays alone is therefore the earliest possible one, and a local holiday can only push it later.

What gets filed, and the case where nothing is due

The underlying duty is set by article 51.1 of the consolidated Act: taxpayers are obliged to file the deeds covering the taxable events and, where none exist, a declaration, within the periods and in the form laid down by regulation¹. Article 99 of the regulation then makes self-assessment the general rule: it is the taxpayer who works out the tax and pays it, without waiting for the administration to assess³. The exception is taxable events arising from the division of an estate and contained in the same document filed for inheritance tax.

The return is accompanied by an authentic copy of the notarial, judicial or administrative deed and a plain copy; if the document is private, it is filed in duplicate; and if the act is not embodied in any document, by a written declaration in substitution setting out the relevant circumstances³.

The case that causes most doubt is the exempt or out-of-scope transaction, and the regulation covers it expressly. Article 107.4 says that where the self-assessment produces no tax to pay, it is filed with the documents directly at the competent office, which stamps the return and endorses the original deed with the classification that applies³. That endorsement is what allows registration afterwards. Filing nothing because nothing was payable is what leaves a deed stuck at the Land Registry.

Article 98.2 lists the little that need not be filed: among other things bills of exchange and protest records, urban lease contracts drawn on stamped paper, and powers of attorney, invoices and similar commercial documents³.

One detail that no longer applies and is still repeated: article 100, which governed the figure of the person presenting the deed, has been repealed since 1 January 2018³.

Form 601, the same tax at a different rhythm

Article 102 bis, also added in 2018, created a regime designed for the second-hand trade. A business or professional regularly acquiring movable goods from private individuals for its activity, in a quantity greater than a hundred acquisitions a month, may self-assess all the purchases of each complete month on a single return, provided the individual amount of each acquisition does not exceed 1,000 euros, within thirty working days counted from the last day of the month being assessed⁴.

The two conditions are cumulative and the two thresholds are strict in opposite directions: with exactly a hundred purchases the case is not met, because the rule asks for «greater than 100»; and a single invoice of 1,001 euros breaks it, because it asks that none «exceed» 1,000. That is the regime self-assessed on form 601, and it explains why a second-hand shop files one return a month rather than one for every item that comes through the door.

Late: a surcharge or a penalty, and who moves first decides

Article 27 of the General Tax Act prices the delay where it is the taxpayer who regularises: 1% plus a further 1% for each complete month of delay against the end of the period⁷. At eleven months that is twelve points.

At twelve months there is not one more point: there is a jump. The surcharge becomes 15% and, in addition, late-payment interest is charged for the period from the day after those twelve months until filing⁷. It is the only step in the article and it is not one to cross by a few days.

The surcharge is reduced by 25% if the whole remainder is paid within the window opened by the notice assessing it and the debt from the late return was paid when it was filed⁷.

And now the condition that governs everything above, in paragraph 1: surcharges are the consequence of filing «late without a prior request», a request meaning any administrative action taken with the formal knowledge of the taxpayer and directed at the recognition, regularisation, verification, inspection, securing or assessment of the debt⁷. If the administration moves first, this stops being a 1% to 15% surcharge and becomes a tax infringement under articles 191 and following, measured in percentages of the tax not paid. Moving first is literally what this article buys.

A worked example with real numbers

A second-hand home purchase signed before a notary on 10 March 2026, with 20,000 euros of transfer tax due. The buyer lives in Madrid and the flat is in another region.

Where. It is property and the purchase deed carries no graduated stamp duty, because that charge requires the act not to be subject to transfer tax. So letter (A) does not come in, it is not corporate, and rule 1 of letter (C) governs: it is filed where the flat stands, not where the buyer lives⁴.

When. That depends on which region it is:

• under one month, 10 April 2026;
• under the thirty working days of the state rule, 22 April 2026 (the count skips weekends and Good Friday, which falls on 3 April in 2026);
• under two months, 11 May 2026, because the 10th is a Sunday and article 30.5 extends it to the next working day⁶.

A month between the first date and the last, on the same deed and the same tax.

What forgetting costs. Suppose the region applies the state rule, the deadline expired on 22 April and the buyer remembers and files on 30 June, of their own accord. From 22 April to 22 June there are two complete months, and 30 June is not yet the third. Article 27.2 gives 1% plus twice 1%: 3%, that is 600 euros, which becomes 450 with the 25% reduction if everything is paid on time⁷.

If instead of remembering it themselves they had first received a communication from the regional tax agency, those 600 euros would not be the figure to be talking about.