Tandem

Employment, tax and legal advice, side by side

Contact

Alongside

A rowing crew pulling their oars together on open water

The advisory partner that sits on your side of the table: employment, tax, legal and compliance, handled by one team that knows your business by name.

Book a first conversation What we take on

Our aim

To make hard rules feel like firm ground under your business.

One team, pulling in the same direction as your business.

Twenty-one years of being exactly who we said we would be.

Four colleagues smiling around a laptop at a shared table

Tandem began with a simple idea: advice can be exact and human at the same time. We have grown every year since and kept the part that matters. Every client has named people who know the file and answer the phone.

Meet the team

What we take off your desk

Five disciplines under one roof, so the lawyer, the accountant and the payroll lead are already talking before you call.

  • Four people reviewing documents together at a wooden table

    Employment and payroll

    Contracts, payroll, hiring and hard conversations, run to the letter and to the person.

    • Monthly payroll
    • Contracts and policies
    • Restructuring
  • A person using a calculator at a desk beside a coffee mug

    Tax and accounting

    Bookkeeping, filings and planning that sees the next quarter coming before it arrives.

    • Quarterly returns
    • Annual accounts
    • Tax planning
  • Two people signing a document at a desk

    Corporate and legal

    Company law, agreements and disputes, with a lawyer who already knows your file.

    • Shareholder agreements
    • Commercial contracts
    • Dispute support
  • A person drawing a diagram on a glass whiteboard

    Compliance and risk

    Data protection, reporting channels and audits, kept current without the last-minute panic.

    • Data protection
    • Internal audits
    • Reporting channels
  • People crossing a bright office lobby with tall windows

    Growth and mobility

    Opening in a new country, moving people across borders, preparing for investors.

    • Market entry
    • Visas and relocation
    • Due diligence

What we hold to

Six habits that decide how we answer the phone, write an invoice and own a mistake.

  1. People before paperwork

    We look after human relationships without distinction: your team, ours, and everyone in between.

  2. One file, many hands

    Specialists from four disciplines work the same file together, so nothing falls between two desks.

  3. Your side of the table

    We take your targets as our own and sit next to you in every negotiation, audit and hard conversation.

  4. Curious on purpose

    We try new tools and methods when they solve a real problem for a real person, never for show.

  5. Accountable in the open

    Responsibility, integrity and transparency are written into how we bill, report and admit what went wrong.

  6. Growth that lasts

    We back businesses built to stay: generous with people, careful with money, fair to the place they work in.

The first ninety days

How a new client moves over to us without a single missed payroll or a late return.

Plan your move

  1. Week one

    A long first conversation

    We listen before we quote: how you work, what worries you, what is already late.

  2. Weeks two and three

    A map of what you owe

    Every filing, contract and deadline in one calendar, with a named person next to each.

  3. Month two

    We take the weight

    Payroll, returns and paperwork move over to us, with your previous adviser briefed and thanked.

  4. Every month after

    Reports you can read

    One page in plain words: what we did, what is coming, and what needs your decision.

The people who pick up the phone

Forty-two specialists in four offices. You will know the names on your file before the first invoice arrives.

We hire people who explain things well. If that sounds like you, write to us.

Careers at Tandem

In their words

They read our contracts more carefully than we wrote them, then explained every risk on a single page. For the first time, compliance feels like a head start.

Clara RuizOperations director, Nortia Foods

  • “Payroll moved over in three weeks and nobody on the team noticed. That was exactly the point.”

    Iker SalasFounder, Brasa Group

  • “One phone call reaches a lawyer, an accountant and the person who runs our payroll.”

    Sofia LindCFO, Northlight Labs

  • “They told us what not to do, which saved us more than any clever idea ever has.”

    Rafael MorenoManaging director, Moreno Textiles

  • “The monthly report is one page long. I read it on the train and I understand all of it.”

    Grace AchebeDirector, Open Doors Foundation

  • “When the inspection letter came, they had the file ready before I had finished reading it.”

    Luis OrtegaOwner, Ortega Clinics

  • “We opened in Lisbon in four months. Tandem handled every form we did not know existed.”

    Emma NovakCOO, Parcel & Co

Industries we know by heart

Every sector has its own collective agreements, deadlines and traps. These are the ones we could recite in our sleep.

The year, filed ahead

Every client gets this calendar in January, with the dates that matter to them and the name of whoever is on each one.

  1. January

    • 20Quarterly VAT and withholding returns
    • 31Annual summary of supplier payments

  2. February

    • 28Year-end pay certificates for every employee

  3. March

    • 31Accounts closed and reviewed with you

  4. April

    • 20First-quarter returns
    • 30Personal tax season opens for partners

  5. May

    • 15Pay reviews and new contracts

  6. June

    • 30Personal income tax returns filed

  7. July

    • 20Second-quarter returns
    • 25Corporate tax return

  8. August

    • 31A quiet month: we plan the autumn with you

  9. September

    • 15Budget review for the coming year

  10. October

    • 20Third-quarter returns and advance payments

  11. November

    • 30Year-end tax planning meeting

  12. December

    • 20Bonuses, payroll close and holiday rotas

Fees without fine print

A fixed monthly fee for the work that repeats, and a written quote before anything that does not.

  • Essentials

    For teams of up to 10 people

    €390per month

    • Monthly payroll
    • Quarterly returns
    • Annual accounts
    • Email support within a day
    Start with Essentials

  • Partner

    Most chosen

    For teams of up to 50 people

    €890per month

    • Everything in Essentials
    • Employment law advice
    • A one-page monthly report
    • A named partner on your file
    Start with Partner

  • Complete

    For groups and growing companies

    €1,690per month

    • Everything in Partner
    • A compliance programme
    • Legal retainer
    • Board meeting support
    Talk about Complete

Questions we hear every week

Something else on your mind? Ask us directly

How quickly can you take over our payroll?

Usually within three to four weeks. We run one month in parallel with your current provider, compare every payslip, and only then switch over.

Do we have to move every service at once?

No. Most clients start with one discipline, often payroll or tax, and add the rest when it makes sense for them.

Who will we actually talk to?

A named partner and a day-to-day contact who both know your file. You get their direct numbers, not a ticket system.

How do you charge for work outside the plan?

We send a written quote before we start. If the work changes along the way, you hear it from us before you see it on an invoice.

Can you work alongside our current accountant or lawyer?

Yes. We often cover one discipline while another adviser keeps the rest, and we are happy to share files with them.

Notes from the desk

All articles

Every good partnership starts with a conversation.

Visit
Calle de Serrano 41, 28001 Madrid
Hours
Monday to Friday, 9:00 to 18:30

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