How this comparison works
This tool runs two parallel calculations on the same business profit:
Sole trader — your full profit is taxed as personal income: income tax, USC, and Class S PRSI (4.2375% blended rate, with a €650 annual minimum).
Limited company — you take a salary (taxed personally, with employer PRSI added to the company's cost), the company pays 12.5% Corporation Tax on what's left, and the remaining profit is paid out as a dividend. The dividend is then taxed at your personal rate too — and this is the detail simpler comparisons often get wrong: as a proprietary director (owning or controlling 15%+ of the company), you're personally liable for Class S PRSI on dividends from your own company. This calculator includes that.
Dividend Withholding Tax (25%) isn't a separate tax on top — it's a payment on account of your income tax bill, already reflected in the "tax on dividend" figure.
At lower and mid profit levels, staying a sole trader is often the better outcome for a single year of full extraction, simply because it avoids the extra layer of Corporation Tax plus dividend tax. The limited company route tends to overtake it as profit rises, and its real advantage shows up in scenarios this calculator doesn't model: retaining profit in the company at 12.5% CT rather than extracting everything, pension contributions (fully deductible with no benefit-in-kind), and timing dividends across lower-income years.
Frequently Asked Questions
Is a limited company always more tax-efficient than a sole trader?
No — not if you extract every euro of profit in the same year. A limited company's real advantage usually comes from retaining profit rather than taking it all out immediately, which this "extract everything" comparison doesn't capture.
Do I pay PRSI on dividends from my own company?
If you're a proprietary director (you own or control 15% or more of the company), yes — Class S PRSI applies to dividend income from your own company, in addition to income tax and USC.
Is Dividend Withholding Tax an extra cost?
No. DWT (25%) is withheld at source and credited against your actual income tax liability — it's a payment on account, not an additional tax.
At what profit level does a limited company become better?
It depends on your salary/dividend split and personal circumstances, but broadly, the gap narrows or reverses as profit rises, since Corporation Tax at 12.5% is lower than the marginal personal tax rates a high-earning sole trader would pay on the same money. Run your own numbers above — the crossover point is different for every business.
Should I switch to a limited company based on this calculator?
Not on this alone. This is a single-year, full-extraction comparison — genuine tax planning depends on your growth plans, whether you'll retain profit, pension strategy, and more. Speak to an accountant before deciding.
Deciding between sole trader and limited company?