Canterbury and Canberra have been slugged with fines by the NRL for salary cap breaches.

Canterbury have been fined $61,474 for breaching the NRL cap by $81,965 last year, with the NRL saying the fine was 75 per cent of the breach amount because the club had self-reported.

Canberra were fined $16,037 for breaches of the second-tier and NYC caps from last year in addition to a $68,073 fine for breaches of the 2015 NRL and NYC caps.