Slightly off the point
Hello
Most agencies, for tax liability reasons, will not accect contractors who are not working through a Limited company. If this is the case, try working through an umbrella company, but downsize is cost involvedand less control over expenses, etc. If major liability is not an option, i.e. your customer will not try to sue you for wrecking their system, or the nature of the work is not very hands on, then go for the Sole Trader option if at all possible. Much simpler thann limited company to operate, less legal requirements etc. However, for peace of mind you should try to get PI insurance, but not for the charge (€4k p.a.) mentioned above. That is a rip off, and it is more cost effective to become a Ltd company, despite the hassle involved.
Taxes for ltd company can be quite cumbersome. Set up a spreadsheet with monthly salary, Tax, PRSI etc. Work out ceiling on PRSI contributions. Better still pay an accountant to set up the spreadsheet for you. Taxes for sole trader, easy, self assessment. Pay an estimate and balance following year.
Vat - same for both types of business structure. Paper work every 2 months, hassle, but good discipline when preparing your accounts for end of year. You may not need to register for Vat, if your turnover is below certain limit. Charging Vat is expected by clients, and it allows you to claim tax back on business inputs.
Lots of good books on start your own business
Regards
C