Self Assessment, Sorted Without the Stress

Simple, reliable tax returns with expert advice tailored to you.

No More Guesswork. Just Peace of Mind.

Whether you're a company director, a sole trader, a buy-to-let landlord or someone with multiple income streams, your Self Assessment tax return can quickly become a headache. 

At Rhombus, we take the stress off your shoulders and make sure everything is submitted accurately, on time, and with your best interests in mind.

From calculating what you owe to helping you plan for future tax bills, we’ll be by your side every tax season.

We Work With…

  • Company directors with salary + dividends

  • Landlords with rental income

  • High-income individuals with multiple sources of income

  • Self-employed professionals and side hustlers

  • Capital gains earners (e.g. shares, crypto, property sales)

If you’re required to file a Self Assessment, we’ll make sure it’s done right, while helping you take advantage of every legal tax relief available to you.

What You Get With Our Self-Assessment Service

  •  Full calculation and preparation of your Self-Assessment tax return

  • Tailored payment schedule (so you’re never caught off guard by deadlines)

  • 1-on-1 consultation to review your tax position and opportunities

  • Direct online submission to HMRC

  • Ongoing support to answer questions about tax codes, expenses, dividends, or PAYE

Avoid Penalties. Maximise Savings

Missing the self-assessment deadline could mean hefty penalties. But even worse? Paying more tax than necessary.

Our expert team will not only help you stay compliant, but also help you make smarter financial decisions all year round.

With us, you’ll never wonder:

  • “Am I claiming all my allowable expenses?”

  • “What can I do to reduce my tax bill legally?”

  • “What happens if I made a mistake last year?”