Business advisors in Madrid

PROLANSI is made up of a team of tax, accounting, legal and labour advisors, who base their work on a model of commitment and vocation for service applicable to all legal, economic and management areas.

We work with self-employed and entrepreneurs, PYMES, large companies, business groups and large estates with a projection of business growth that need tax, labour, legal, accounting and financial consultancy and advisory services of proven quality.

What is the secret of our success?

Our success is based on the trust our clients place in each of our expert advisors and in each of the services we provide. We are able to cover any aspect required by SMEs, large companies and the self-employed. We adapt to the needs and provide solutions.

Business advisors in Madrid


At PROLANSI we have a team of qualified advisors and experts in the different areas in which we provide services. At the head of the company is Jaime Langle Sierra, a graduate in Law from the Universidad Complutense / CEU – San Pablo, with a Master’s Degree in Business Administration (MBA) from the University of Houston (USA). He also has extensive management experience in banking, important real estate groups and company management.

As a result of our experience of more than 25 years in the sector, we know how much companies struggle, we know their strengths and weaknesses and therefore we offer to be part of your team, making your ambitions our own, working together to achieve your goals, sharing knowledge and solutions to real cases, providing experience and solutions in a real, fast and empathetic way.

Why PROLANSI Advisors?

At PROLANSI we seek to establish relationships of trust with our clients, based on honesty, commitment, ethics and professional excellence. Our goal is to offer comprehensive advice to the needs and challenges of each client.


Committed to your business to be proactive, close and to anticipate the needs of your company.


Professionalism is reflected in our dedication to understanding each client's needs and goals on an individual basis.


Our experience has taught us the importance of listening to our clients and understanding their goals and challenges.


Advising companies and freelancers to individuals

satisfied customers

The most important thing for PROLANSI is the satisfaction of a job well done.

How can we help you?


You will have a team of advisors available, either in person, by email or by telephone, to answer your questions and/or queries.

Risk assessment

In each of the areas in which we provide services, we carry out an exhaustive evaluation and control in order to provide a quality service.

Quality and guarantee

Our firm offers a quality-oriented service through personalised and direct treatment, professional qualification.

Consulting services

Tax advice

We provide support in the definition and implementation of your company’s tax and accounting strategy.

Labor advice

Management and advice on affiliation, contributions and labor relations with employees.

Accounting advice

We help you to fulfill your commercial obligations with the Administration and with your partners and investors.

Legal advice

We offer you a legal – commercial advisory service, adapted to the needs of your company.

Real estate management

We provide a personalized, competitive and high quality service in real estate consulting and management.

Do you need business consultants in Madrid?

Talk to an advisor now!

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