Online tax advisory Spain: remote reach and limits

Online tax advisory in Spain is the remote handling of models, queries and procedures before the Tax Agency through an electronic power of attorney, the firm’s certificate and electronic-office or DEHú channels; a video call replaces a visit to the office, not taxpayer status or Hacienda’s legal deadlines. AEAT, power of attorney ZP01; Law 39/2015, Article 14; General Tax Act, Article 17.

If what you want is the map of taxes plus books without staff, that angle sits in tax and accounting advisory. If payroll is already in play and the bookkeeper lives elsewhere, see tax and payroll advisory with accounts elsewhere. The month of banks and ledgers is in monthly accounting advisory. The remote employment channel is in online employment advisory Spain. The focus here is different: how far a remote tax adviser reaches, and when accounting or employment still sits outside.

Scope: the common state scheme. Outside that scope, unless mentioned, are the Basque Country and Navarre in their foral layer, the Canary Islands for anything that is not state law, and any advice about your own NIF. Contracting the service does not transfer your obligations to the Administration. General Tax Act, Article 17.

What “online” means in Spanish tax practice

In Spanish practice, online tax advisory is not a separate legal regime. It is the same map of models, censuses, withholdings and settlements, run over the internet. Taxpayers with legal capacity may act through a representative; for internet use, the AEAT keeps an electronic power-of-attorney register that records representations granted to third parties to act electronically in the interested party’s name. AEAT, power of attorney ZP01; General Tax Act, Article 46.

That power can be granted online with an admitted electronic signature, by appearance at Agency offices, or by public or private document with a notarially legitimated signature filed with the AEAT. AEAT, form and procedure of the power-of-attorney register. Without that instrument (or without the representation that the specific procedure requires), the remote firm does not file for you even if you have already signed a service contract by email.

Notifications close the triangle. Legal persons and anyone representing a party who is already under that obligation must deal with the Administrations by electronic means. Law 39/2015, Article 14. Notifications are preferably served by electronic means and, in any event, when the interested party is obliged to receive them that way. Law 39/2015, Article 41. When electronic notification is mandatory or chosen, it is treated as rejected if ten calendar days pass from when it is made available without access to the content. Law 39/2015, Article 43.

The AEAT defines the circle of mandatory electronic notifications (NEO): public limited and private limited companies, entities without legal personality, large companies, tax consolidation, VAT groups, REDEME and customs cases, among others. Enrolment is automatic. Access may be through DEHú or the electronic office; after ten calendar days without access, the notification is treated as served for the purposes of the procedure. AEAT, NEO.

Operational detail on the mailbox sits in mandatory electronic tax notifications. How to get the power properly in place is in AEAT power of attorney for your tax adviser. Only this weighs here: a remote adviser without a power of attorney or without watching the channel does not handle what the Administration has already treated as notified.

A video call works for reviewing a draft or clearing an activity heading. Email works for sending PDFs. Neither replaces the power of attorney, the certificate used to file, or the person who has to look at the electronic office or DEHú in time.

Models and calendar without a local office

To operate remotely before the AEAT you need a power of attorney recorded in the electronic power-of-attorney register (online with an admitted signature, by appearance, or by public or private document with legitimated signature), acceptance where required, and filing of the models with the attorney’s certificate within the taxpayer calendar deadlines. AEAT, form and procedure of the power-of-attorney register; AEAT, taxpayer calendar 2026.

For a self-employed person in common territory, the quarter usually turns on VAT and, where relevant, IRPF payments on account. The Practical VAT Manual 2026 places quarterly modelo 303 self-assessments from the 1st to the 20th of the month following the settlement period in April, July and October, and from the 1st to the 30th of January for the fourth quarter; the annual summary modelo 390, where applicable, also falls in that January window. AEAT, VAT filing deadlines.

The 2026 taxpayer calendar sets filing and direct-debit windows. For models 111, 115, 117, 123, 124, 126, 128 and 216 with a quarterly obligation, the general filing window runs from the 1st to the 20th of January, April, July and October. For models 130 and 131, the general quarterly filing window is from the 1st to the 30th of January and from the 1st to the 20th of April, July and October. Direct debit often shortens the window (as a general rule, until the 15th for several quarterly models in April, July and October). AEAT, taxpayer calendar 2026. Those dates belong to Hacienda. The pack does not invent them, and the firm’s distance does not stretch them.

The combined 303 and 130 rhythm, direct debit included, is in quarterly VAT and income tax for freelancers. This guide does not rewrite that calendar box by box. For the remote channel the useful point is plainer: a firm in another province files on the same clock as one on the corner.

A company in the common scheme adds Corporation Tax, instalment payments where due, and the bookkeeping circuit that feeds those settlements. The published tax and accounting advisory service describes the tax and accounts catalogue. Which models leave your fee is fixed by the pack terms, not by the service-page headline.

What the remote tax adviser does and what they do not invent

With a current power of attorney and a working certificate, the adviser can prepare and file models, answer engagement queries and, if the pack includes it, respond to certain document requests. In the published packs, filing uses the digital certificate of TAX FACTORY, S.L.; the client’s certificate is not requested. Particular terms of the packs.

There are things the remote channel cannot manufacture. It cannot paint a taxable base different from the one your invoices and bank statements document. It cannot park an approximate regime or activity heading because the census is still confused. It also does not direct-debit a payment if the account has no balance on the charge day, and it does not, by magic, open a notification nobody has looked at within ten calendar days.

The elements of the tax obligation may not be altered by private acts or agreements, which produce no effects before the Administration, without prejudice to their private-law consequences. General Tax Act, Article 17. Handing the click to an attorney splits the operations; it does not erase that position.

Accounting: the limit remote tax work does not cover alone

Filing a 303 does not prove the invoice month is in order. Bookkeeping or register work is another layer. Every trader must keep orderly accounts suited to the activity of their business, allowing a chronological trail of all operations and the periodic preparation of balance sheets and inventories. Commercial Code, Article 25. That frame weighs on mercantile companies and on anyone obliged to keep accounts under the Code; a self-employed person in direct estimation often works with IRPF register books. Detail on that month sits in monthly accounting advisory.

In the TaxFactory catalogue the boundary shows in each pack’s text. ADVISE includes Holded and leaves booking of invoices by TAX FACTORY, S.L. outside; the client is responsible for the information they upload after training. STARTER also includes Holded and excludes full invoice booking by the firm. DO IT and GROWTH take on booking under their published wording. Particular terms of the packs.

If you search for “online tax advisory Spain” because you want the model click from another province, ask in the same sentence who records operations and who reconciles banks. A remote firm can file with a power of attorney and still leave the bookkeeping month with you. Mixing both into the same headline does not merge them in the fee.

Hypothetical example: you sign ADVISE from Valencia with an adviser in Barcelona, upload invoices to Holded and the 303 is filed. That alone does not prove TAX FACTORY, S.L. booked each invoice: in ADVISE that booking is excluded. Particular terms of the packs.

Employment: the other limit of the tax pack

While nobody provides services as an employee under the common scheme, the tax engagement may be enough. When staff join, registrations, contracts, payroll and contributions appear. An AEAT power of attorney does not open that map. Sistema RED and Contrat@ are different channels; a power for Hacienda does not assign a CCC or notify a contract to the employment service. Remote operation of that layer sits in online employment advisory Spain; Pack NÓMINAS prices and exclusions are in employment advisory: contracts, payroll and social security.

In ADVISE, DO IT and ALL IN, the exclusion is worded as employment management and payroll (Pack NÓMINAS). In STARTER and GROWTH, as payroll and employment management (Pack NÓMINAS). SCALE includes the administrator payroll and leaves additional employee payrolls outside. Particular terms of the packs.

Published Pack NÓMINAS price: €65/month + VAT (base), plus €16/month + VAT per worker, with no lock-in, and with its own employment adviser distinct from the tax adviser. Models 111 and 190 enter that pack only if you do not already have a tax pack with TAX FACTORY, S.L. Labour inspections, complex dismissals, ERE/ERTE, PRL and household employees are charged separately. Particular terms of the packs.

A TRADE invoices as a self-employed person. A supplier issues an invoice. An administrator may be paid for the office without common-scheme staff. None of those scenarios alone turns the tax pack into Pack NÓMINAS. If the relationship is employment, the map changes before registration, not after the quarter closes. The published employment service is at employment and payroll.

Day 10, certificate and mailbox watch

Unless otherwise stated, the client must supply the necessary information and documents before day 10 of the settlement month. If the information is not supplied before day 10, TAX FACTORY, S.L. does not guarantee filing on time, and surcharges, interest or penalties arising from that delay or from incorrect data supplied by the client are the client’s sole responsibility. Particular terms of the packs. That day 10 organises the firm’s work. The AEAT’s day 20 or day 30 remains the Agency’s.

In remote practice each period usually travels with the same imperfect folder: issued and received invoices, statements or reconciliation if the engagement asks for them, census or withholding changes, and some intra-EU transaction somebody forgot to flag. It also helps to confirm that the power of attorney and the attorney’s certificate are still current; an expired power does not warn you just because the adviser’s WhatsApp is open.

Several packs leave outside the ordinary fee, charged separately, management of electronic notifications (DEHú) and representation in a formal tax inspection. Particular terms of the packs. Calling the service online does not fold those items into the ordinary fee. Decide in writing who watches the mailbox and what happens if a formal inspection arrives.

When remote is enough and when it is not

The remote tax channel is enough when there is an effective power of attorney, documents on time, notification watch and the pack covers the models you need; you must add accounting when the invoice month is not in the fee, and Pack NÓMINAS or another employment engagement when common-scheme staff join. General Tax Act, Article 17; Particular terms of the packs.

Practical criteria:

Situation	Remote tax usually enough	Usually needs another layer or reinforcement
Self-employed without staff, pack models, data by day 10	Yes, with power of attorney and certificate	Accounting if the pack does not book invoices
Company with a pack that includes accounts and Corporation Tax	Yes, within that wording	Employment if there are employees beyond a covered administrator
You only want the 303/130 click from another province	Yes for the model	Ask who keeps books or Holded
First common-scheme worker joins	Tax continues	Pack NÓMINAS or employment engagement before registration
Notification in DEHú or electronic office	Support if power and management are contracted	If DEHú management is excluded, someone must watch the channel
Formal tax inspection	Documentary preparation at a distance	Formal representation usually sits outside the fee
Foral territory or special scheme	—	Outside this guide; own channel and rules

The remote channel also breaks on ordinary operational nonsense. Expired power. A procedure that was never in the power of attorney. The firm’s certificate with no access on day 19. An administrator who never opens DEHú because “the advisory already handles it” when mailbox management was separate. The online label does not fix that.

When you need all three layers in the same firm, the map is in tax, payroll and accounting in one firm. When you only needed to separate taxes from payroll with accounts elsewhere, go back to tax and payroll advisory with accounts elsewhere.

Limits you should not assume are covered

This guide is limited to the common state scheme: it does not resolve the Basque Country or Navarre in their foral layer, the Canary Islands for anything that is not state law, or a specific formal inspection; it is not personalised advice and it does not replace a written engagement. Particular terms of the packs.

Other boundaries:

An AEAT power of attorney does not open Sistema RED or Contrat@. TGSS, Sistema RED authorisation; SEPE, Contrat@; tax-register contrast AEAT, power of attorney ZP01.
Including Holded does not mean, in ADVISE or STARTER, that the firm books your invoices.
DEHú management and representation in a formal inspection appear as exclusions charged separately in several packs.
Models such as 720, 721 or 369 may sit outside depending on the pack text; do not assume the full catalogue from the online headline.

When the ordinary tax engagement does not reach, the pack terms leave it outside the fee and charge it separately. The published tax-accounting service is at tax and accounting advisory.

What to do now

List the models you file each quarter or month and check whether they enter the pack you are looking at.
Decide who books or keeps register books: you after training, the firm, or another bookkeeper.
If common-scheme staff are present or coming, budget Pack NÓMINAS or another employment engagement before registration; do not wait for quarter-end.
Grant the AEAT power of attorney with the needed procedures and fix who watches the electronic office and DEHú, especially if that management sits apart.
Treat day 10 of the pack as an internal work cutoff. The Agency’s legal deadline is another clock.

If you are still choosing an engagement without employees, start with tax and accounting advisory and the pack terms. If the problem is the power of attorney or the mailbox, use AEAT power of attorney and electronic notifications.

Frequently asked questions

Does online tax advisory transfer your obligations to the Tax Agency?

No. The elements of the tax obligation cannot be altered by private acts or agreements as against the Administration. A remote firm can file models with a power of attorney and certificate, but you remain the taxpayer. General Tax Act, Article 17; General Tax Act, Article 46.

Is an AEAT power of attorney enough for the adviser to manage everything at a distance?

The power of attorney lets them act electronically on the enabled procedures, but it does not replace watching the notification channel and does not by itself open Sistema RED or Contrat@. If nobody opens DEHú or the electronic office in time, the notification may be treated as served. AEAT, power of attorney ZP01; TGSS, Sistema RED authorisation; SEPE, Contrat@; Law 39/2015, Article 43; AEAT, NEO.

Does an online tax pack already include payroll and staff registrations?

No. In ADVISE, DO IT, ALL IN, STARTER and GROWTH, employment management and payroll sit outside as Pack NÓMINAS. SCALE includes the administrator payroll and leaves additional employee payrolls outside. Hiring staff does not turn a tax engagement into an employment one. Particular terms of the packs.

Does filing the 303 at a distance mean the firm also books your invoices?

Not necessarily. In ADVISE and STARTER, booking of invoices by TAX FACTORY, S.L. is excluded and the client is responsible for what they upload. DO IT, GROWTH and higher packs do take on accounting under their published wording. Ask what the bookkeeping month covers apart from the model click. Particular terms of the packs.

Is day 10 the Tax Agency legal deadline?

No. Unless otherwise stated, day 10 of the settlement month is the contractual cutoff for supplying documents to the pack. AEAT filing windows (for example until the 20th or the 30th depending on the model) remain the Agency’s. Particular terms of the packs; AEAT, VAT filing deadlines.

When is online tax advisory not enough?

When the accounting layer that the pack does not cover is missing, when staff join without Pack NÓMINAS, when a formal tax inspection sits outside the fee, when there is no power of attorney or nobody reads notifications, or under foral schemes and cases that need presence or a specific strategy. Particular terms of the packs; General Tax Act, Article 17.