+50
Years of experience
50
Professional
6.500
Monthly payrolls
3.200
Annual training hours
85%
of our customers recommends us
7,550
Tax Advice for the Self-Employed
Tax advice for the self-employed with clarity and without errors
We process your taxes, books and tax obligations so that you can focus on your activity.
At Sellarès Assessors we help self-employed workers in any sector to comply with their tax obligations without stress or errors. We file your quarterly returns, keep your income and expense books and give you access to an online platform so that you can issue invoices and control your accounting in a simple way. You focus on your business, we focus on everything being in order.
- Calculation and preparation of monthly payslips
- Social Security Settlement (TGSS)
- Registrations, deregistrations and modifications in Social Security
- Employment contract management and renewals
- Control of absences, medical leaves and incidents
- Company certificates and procedures with the SEPE/INSS
- Work dashboards with Power BI
- Digital portals for companies and workers
- Digital signature of employment documents
- 24/7 employee registration
Contact us
Our payroll management service in Barcelona includes everything your company needs to comply with labor regulations and keep daily operations under control.
Monthly payroll management
- Calculation and preparation of monthly payslips
- Social Security Settlement (TGSS)
- Control of absences, medical leaves and incidents
- Company certificates and procedures with the SEPE/INSS
Registrations, cancellations and hiring
- Registrations, deregistrations and modifications in Social Security
- Employment contract management and renewals
- 24/7 employee registration
Technology and reporting
- Work dashboards with Power BI
- Digital portals for companies and workers
- Digital signature of employment documents
Our outsourced labor management service in Barcelona includes everything your company needs to comply with regulations and keep daily operations under control.
Registrations, cancellations and hiring
- Registrations, deregistrations and modifications in Social Security
- Employment contract management and renewals
- 24/7 employee registration
Technology and reporting
- Work dashboards with Power BI
- Digital portals for companies and workers
- Digital signature of employment documents
Monthly payroll management
- Calculation and preparation of monthly payslips
- Social Security Settlement (TGSS)
- Control of absences, medical leaves and incidents
- Company certificates and procedures with the SEPE/INSS
What our tax advice for the self-employed includes: Everything you need to comply with the Tax Office without wasting time
Periodic declarations and tax obligations
- Quarterly VAT and Personal Income Tax filing (forms 303 and 130)
- Informative returns and annual summaries (190, 390...)
- Census declarations (form 036 / 037)
- Management of payment deferrals and instalments
Taxation by direct estimation or modules
- Determination of the appropriate tax regime
- Calculation of modules and estimated net yield
- Review of changes in activity or headings
- Application of reductions, deductions and bonuses
Books and online platform
- Preparation of income and expense books
- Access to invoicing and accounting platform
- Invoice issuance from any device
- Track revenue, expenditure, and tax forecast
Do you do your taxes on your own or with a non-specialized agency? Common Problems When You Don't Have Expert Tax Advice
Errors in quarterly returns
A failure on form 303 or 130 may result in automatic penalties.
Not taking advantage of deductions or reductions
Many self-employed people pay more because they don't know what they can deduct.
Having books that are not updated or poorly structured
This complicates inspections and makes it difficult to really control the business.
Lack of foresight in the face of payments from the Treasury
Without a global vision, taxes catch you by surprise.
Not knowing when to switch from modules to direct or the other way around
Choosing the wrong tax regime can be very expensive.
Ignorance of additional obligations
Failure to submit an information form on time is also sanctioned.
Clear taxation and real support for your business
At Sellarès Assessors we explain in simple words what you need to know to comply without risks. You don’t need to understand the regulations in detail: we take care of the entire tax process and answer your questions. Whether you need to issue an invoice, find out how much you’ll pay this quarter, or change your tax regime, you have an expert team by your side.
And we don’t just make statements: we review your books, help you organize deductible expenses and let you know if we detect anything that could be improved or avoided. We’ve been helping professionals like you work with peace of mind for decades.
Technology so that you have control without wasting time: Simple, accessible online platform adapted to the day-to-day life of the self-employed
Our online platform allows you to issue invoices, record expenses and control your income from anywhere. We keep track, manage your taxes, and keep your books up to date. You only need to log in when you want to see how your business is doing.
- Issuing invoices and quotes from your mobile phone or computer
- Quick Expense Registration and Digital Filing
- Tax forecasting and tax simulator
- Direct link with your advisor to answer questions
Meet Sellarès Assessors
At Sellarès Assessors we have been accompanying SMEs for more than five decades.
Our multidisciplinary team offers comprehensive advice in the labour, tax, accounting and legal areas, with a strategic, human and technologically up-to-date perspective.
Figures that support our commitment
We know that the self-employed have no time to lose and no margin for tax errors. That’s why we offer you a professional but accessible service, with the support of a team that knows your situation and adapts to your pace.
+50
Years of excellence
50
Professional
6.500
Payslips per month
3.200
Annual training hours
85%
of our satisfied customers
7,550
Annual tax settlements
Sellarès in numbers: References and data
+50
Years of experience
50
Professional
6.500
Monthly payrolls
7.550
Annual tax settlements
3.200
annual hours invested in training work teams
85%
of satisfaction of our customers
More than 50 years advising freelancers with rigor and closeness
What other self-employed people ask us about tax advice
What models do you present each quarter?
We present VAT form 303 and personal income tax form 130 if you are in direct estimation. We also manage form 131 if you pay taxes by modules, and all the information forms when applicable (390, 190, 347…).
What does the online platform include? Is it easy to use?
It includes invoicing, expense management, tax forecasting, and access to your books. It’s very intuitive, and if you need to, we can help you set it up and use it. It is included in our service at no additional cost.
Can you help me choose between modules or direct estimation?
Yes. We analyse your activity, volume of income and IAE heading to determine which tax regime suits you best. We also inform you if you are interested in changing according to your evolution.
How do you manage payment deferrals to the Treasury?
We submit the deferral request electronically, review your accumulated debt and propose the most convenient instalment. We also keep track of the payment schedule.
Can I deduct expenses if I work from home?
Yes, but in a partial and justified way. We advise you on what part of rent, utilities or internet you can legally deduct, and how to reflect this in your books and returns.
What happens if I cancel or cease my activity?
We process the deregistration from the Treasury and Social Security census, close the tax year and submit the necessary forms. We also explain whether you are entitled to any severance benefits.
Contact us without obligation
Take the first step now
Fill out the form and an expert will contact you to answer your questions.
Response in less than 24 hours.
- Calculation and preparation of monthly payslips
- Social Security Settlement (TGSS)
- Registrations, deregistrations and modifications in Social Security
- Employment contract management and renewals
- Control of absences, medical leaves and incidents
- Company certificates and procedures with the SEPE/INSS
- Work dashboards with Power BI
- Digital portals for companies and workers
- Digital signature of employment documents
- 24/7 employee registration