The C Royal & Co Blog

Practical Irish accounting, tax and bookkeeping guides — written by a Chartered Accountant, free of jargon.

New posts twice a month covering Irish tax deadlines, sector-specific accounting, planning ideas and the questions our clients ask most. Bookmark the page or subscribe to the monthly summary via the contact form.

Bookkeeping

5 Biggest Accounting Mistakes Small Businesses Make (and How to Avoid Them)

After 20 years acting for Dublin SMEs, here are the five errors we see most often — and the simple practices that prevent them.

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Income Tax

Home Office Deduction 2026: How to Claim From Your Taxes

Flat rate vs apportioned actual costs, the records you need, and the CGT trap on principal-private-residence relief.

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Payroll

Payroll Compliance in Ireland: PAYE, PRSI, USC and ePAYE

Real-time reporting since 2019 changed everything. Here's how to run compliant Irish payroll month after month.

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Bookkeeping

What Records Must I Keep? Irish Revenue's Requirements in Plain English

The 6-year rule, what counts as a record, digital vs paper, and the records that most often go missing at audit.

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Structure

Self-Employed vs Limited Company: A Tax & Accounting Comparison

Side-by-side tax modelling at €40k, €80k and €150k profit. Plus the non-tax factors that should drive the decision.

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Income Tax

Preliminary Tax vs Final Tax: Ireland's Self-Assessment System Explained

Three ways to calculate preliminary tax, when to use each, and how to avoid 8% statutory interest on underpayments.

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Tax Planning

How to Reduce Your Business Tax Bill in Ireland: 10 Legal Strategies

Ten mainstream reliefs Irish business owners overlook — pension, capital allowances, EII, R&D credit, family employment and more.

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Construction

RCT Tax Explained: The Construction Industry Guide

Relevant Contracts Tax catches more Irish builders than any other compliance issue. A plain-English explainer with principal/subbie tests.

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VAT

VAT Registration Threshold Ireland 2026: When Do You Need to Register?

The 2026 thresholds are €85k goods and €42.5k services. Here's when to register, when to register voluntarily, and the trap most sole traders fall into.

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Corporation Tax

CT1 Corporation Tax Return: Step-by-Step Guide for 2026

How Irish companies file the CT1 return without the panic — deadlines, preliminary tax, iXBRL and the most common mistakes we see.

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