About Zythos

There’s a moment in the life of every freelancer, small business or homeowners’ association when accounting stops being paperwork and becomes a risk. A deadline slips through the cracks, an invoice gets misfiled, or a language barrier shuts you out of the conversation with the tax authorities. At Zythos Business, we exist so that moment never comes.

We’re a full-service advisory firm based in Boadilla del Monte, Madrid, specialising in tax, accounting, employment and corporate law. But what really sets us apart isn’t our list of services — it’s how we deliver them.

Nothing gets filed late. Ever.

Behind every Zythos client is a dedicated system that tracks, one by one, every tax deadline: forms, filing dates, recurring obligations. We don’t rely on anyone remembering. The system never sleeps, never forgets, and never leaves you exposed to an avoidable fine or surcharge.

And behind that system, your books are kept accurate down to the last cent. No rough estimates, no “we’ll square it up at year-end”: every entry, every account, every figure checked with the rigour that real business decisions demand.

We speak your language, literally

A significant share of our clients are foreign companies and individuals operating in Spain. We know what it’s like to face Spanish tax regulations without mastering the language, or without knowing the customs and deadlines of a system that isn’t your own.

That’s why we work in Spanish, English, French, German, Italian and Chinese. We don’t just translate the words — we explain your tax and accounting situation in your language, with the same precision we’d give a local client.

Your advisor, not a department

At Zythos there are no call centres and no tickets bouncing between agents. Every client deals directly with the person who manages their accounts — the same person who knows your business, who replies when you write, who signs what gets filed.

That closeness is what lets us get ahead of problems instead of reacting to them, and it’s what turns an advisory firm into a trusted partner.

What we manage

• Freelancers who need flawless tax and accounting management without losing time to paperwork.
• Small and medium businesses looking for a solid legal, corporate and tax structure to grow with confidence.
• Homeowners’ associations that need clear, orderly administration with no surprises.
• Trademark registration, both national and international, to protect what you’ve built.

Structure, not just paperwork

Our work doesn’t end with filing forms. We support the management, planning and upkeep of your business from day one, giving it the legal and corporate structure it needs to stand up to any authority, while always looking for the most efficient — and legal — way to reduce your tax burden.

That’s Zythos: a system that never fails, accounts that always balance, and a real person on the other end who speaks your language and knows your business.

Talk to your future advisor at Zythos today