Tax advice for individuals and companies in La Línea de la Concepción
Legal, tax and wealth advice with international reach.
Tax and legal advisory firm in La Línea de la Concepción for families, self-employed people, companies and investors from San Roque, Sotogrande, Algeciras and the whole Campo de Gibraltar (the area around Gibraltar). We prepare your income tax return and your taxes, handle inheritances and property purchases and sales, work with non-residents and defend you before the Spanish Tax Agency (Hacienda), also remotely for clients across Spain.
years of experience
rating on Google
service in Spanish and English
service across Spain
Services of our firm in La Línea de la Concepción
A team of tax advisers and lawyers: taxes for individuals and companies, and the legal side of inheritances and property sales and purchases.
Tax advisory
Tax planning and review for individuals, self-employed people and companies, with a Spanish and international focus.
We prepare and review your return before filing it. Also previous years, supplementary returns and corrections.
Tax notices (requerimientos), limited tax reviews, tax audits, penalties and appeals. We reply within the deadline.
Foreign owners of property in Spain, Form 210 (modelo 210), tax residence, Gibraltar and double taxation. Service in English.
We calculate and file property transfers, inheritances and gifts on your behalf (Forms 600, 650, 651).
Registration with the tax office, quarterly VAT and personal income tax (IRPF), and advice throughout the year.
Setting up the S.L., corporate income tax, appointments and changes of director.
Legal and estate work
From reviewing the will and the heirs to acceptance, division of the estate, the tax and registration of the assets.
We review the transaction before you sign: deposit contract (contrato de arras), charges on the property, title deed (escritura), property transfer tax (ITP), stamp duty (AJD) and the 3% withholding if a non-resident sells.
Appeals against tax assessments and penalties, and economic-administrative claims.
We compare giving, inheriting and other options to organise the family estate before you make any decisions.
One adviser, from start to finish.
Tax advisers and lawyers with more than 20 years of practice in the Campo de Gibraltar.
How we work
A clear process from the first conversation: at every stage you know what we are doing, what we need from you and what the scope of the instruction is before we start.
Step 1
You tell us about your case
By WhatsApp, phone or the form. You explain what is happening and send us any documents you have.
Step 2
We study your situation
We review the documents, analyse your tax and legal position and weigh the options the regulations allow.
Step 3
We propose a written plan
You receive a proposal with the work we will do, the timescales and the quote, with no small print.
Step 4
We sign the engagement letter
With the terms of the service in writing and your authorisation to act on your behalf before the authorities.
Step 5
We get it under way
We file, settle or appeal before Hacienda and the Andalusian regional government, and keep you informed of every step until the matter is closed.
What to file, month by month.
The deadlines we are asked about most. If we handle your taxes, we keep track of them.
Year-end for self-employed peopleVAT and personal income tax (IRPF) for the fourth quarter and annual summaries.
Assets abroadForm 720 (modelo 720) if you have accounts, securities or property outside Spain.
Income tax return campaignAnd wealth tax (Impuesto sobre el Patrimonio). Also, 1 to 20 April, first quarter.
Last day for the income tax returnIf you owe tax and want to pay by direct debit, the deadline ends a few days earlier.
Corporate income taxAnd, 1 to 20 July, the second quarter for self-employed people.
Third quarterVAT and personal income tax for self-employed people and instalment payments for companies.
Non-residents with a home in SpainForm 210 (modelo 210) for a home you did not rent out the previous year.
Tax notices, assessments and penaltiesThe deadlines to reply or appeal are short. We study the notification and prepare the reply on time. Send the notification →
We file on your behalf with the Spanish Tax Agency and the Andalusian regional government.
We are registered social collaborators (colaboradores sociales) of both administrations: we calculate, pay and send you the receipt. You do not need to book an appointment or go to any office.
Registered social collaborator
Spanish Tax Agency (Agencia Tributaria)
- Income tax return (Form 100)
- VAT, quarterly personal income tax and withholdings
- Corporate income tax
- Non-residents (Form 210)
- Payment deferrals and appeals
Registered social collaborator
Andalusian regional government (Junta de Andalucía)
- Property transfer tax and stamp duty (Forms 600, 601 and 621)
- Inheritance and gift tax (Forms 650, 651 and 660)
- Appeals and refunds of undue payments
Talk to an adviser by video call.
By video call, in Spanish or in English. You tell us about your case and we review the documents; the consultation has a fixed price that you know before you book. A few days later you receive a fixed quote in writing, with no surprises or small print, and we sign the engagement letter before starting.
What our clients say
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Frequently asked questions about our firm in La Línea
What does a tax adviser do for me?
They tell you which taxes apply to you and how to pay only what is due, file your returns on time and represent you if Hacienda writes to you. At Asesoría Serra we handle the income tax return, taxes for self-employed people and companies, inheritances, gifts and property purchases and sales, and we reply to tax notices, reviews and audits. What we aim for is to deal with the problem before the letter arrives.
Are you an administrative agency (gestoría)? Which procedures do you handle?
We do what people usually look for in an administrative agency (gestoría) on the tax side: income tax return, registration as self-employed, quarterly VAT and personal income tax, setting up companies and filing the Andalusian regional forms (600, 650, 651). We do not run payroll or the monthly bookkeeping of businesses; if you already have an agency for that, we work with it.
Can I keep my own administrative agent (gestoría)?
Yes. Many clients keep their administrative agency (gestoría) and call us for anything out of the ordinary:
- We represent you before Hacienda in any tax audit or tax procedure.
- We reply to letters, tax notices and notifications within the deadline and in the right form.
- We appeal assessments and penalties so that you do not pay what you do not owe.
- We handle payment deferrals and instalment plans for debts.
- We plan the tax position of individuals and companies with operations between Spain, Gibraltar and the United Kingdom.
- We deal with the legal and tax side of inheritances and property purchases and sales.
Do you work with clients from San Roque, Sotogrande and Algeciras?
Yes. Our office is in La Línea de la Concepción, with clients from San Roque, Sotogrande, Algeciras, Los Barrios and the rest of the Campo de Gibraltar, and from other towns in the province of Cádiz. If you cannot come, we hold the consultation by video call and you send us the documents by email.
What does saving tax mean in practice?
It means paying what you owe and no more, by applying reductions, allowances, deductions and special regimes correctly: choosing between acting as an individual or through a company, fixing your tax residence properly, or planning a gift before making it. It is legal tax planning, not evasion.
How do the first consultation and the quote work?
The first consultation has a fixed price, which you see when you book it in the online consultation. In it we assess your case and review the relevant documents. A few days later you receive a fixed quote in writing, adapted to the complexity of your instructions, with no surprises or small print.
How can I pay?
We accept bank transfer, card and cash. For recurring clients we offer direct debit. The online consultation is paid by card when you book a day and time in the calendar of the online consultation.
What is the difference between a tax advisory firm and an administrative agent (gestoría)?
An administrative agency (gestoría) mostly deals with paperwork: registrations, forms and filing. A tax and legal advisory firm like ours, closer to a consultancy, studies your case first, gives you the information to make decisions and defends you if Hacienda reviews what was filed. If you already work with one of the agencies in La Línea or the area, you can keep it and count on us for anything out of the ordinary.
Do you provide employment or accounting services?
On the employment side, only what affects the self-employed: as authorised users of the Social Security RED System, we handle your registration and deregistration in the RETA scheme. We do not run payroll, employment contracts or the monthly bookkeeping of your business. If you already have an employment or accounting adviser, we work with them on the tax side of your activity, and if you need help with payroll we tell you from the start.
What information do I need for the first meeting?
A short explanation of your case and the information you have is enough: the letter from Hacienda, the title deed (escritura), the details of your activity or your last return. With that we see what you need and propose a written work plan.
How do I know which tax adviser is right for my case?
Ask about cases like yours and ask for the options to be explained before you start; be wary of anyone who promises results. We deal every day with cross-border tax, inheritances and estates in the Campo de Gibraltar, we have a rating of 4.9 out of 5 in Google reviews and we treat every instruction with full confidentiality.
A team of tax advisers and lawyers in La Línea de la Concepción
From our office on Calle Cervantes we work with individuals, self-employed people and companies in the Campo de Gibraltar, and with clients across Spain by video call. We review the documents before proposing anything and give you the scope of the work and the quote in writing.


Shall we talk about your case?
Need to resolve a tax matter, an inheritance, a property transaction or a procedure with Hacienda? Tell us about your case and we will explain the next steps.
Our office is in La Línea de la Concepción. We work with clients in Sotogrande, San Roque, Algeciras and the Campo de Gibraltar.
C/ Cervantes 2, entreplanta, despacho 4 · 11300 La Línea de la Concepción
WhatsApp 652 948 572 · 956 174 981 · pablo@asesoriaserra.es
