Part of the rationale for [broken link removed] is that they suit this sort of sporadic contribution pattern. Many non PRSA personal pension plans (Retirement Annuity Contracts or RACs) also allow contributions to be varied or stopped as required. I'm not sure if there are other options available to you as a self employed person. As ever, whatever sort of pension plan you go for, make sure that the charges are competitive and that the fund choices available are appropriate to your needs. If in doubt get independent, professional advice.