The sale of prize bonds fell by 6 per cent to €126 million last year due to new rules on identification and addresses.
The Prize Bond Company said the total amount invested in prize bonds increased by 11 per cent to €506.4 million and €11.2 million were paid out in prizes.
Chairman of The Prize Bond Company Michael O'Keeffe said the financial results show that Prize Bonds are regarded as an attractive, risk-free investment by many Irish investors.
"While Prize Bonds have been in existence since 1957, the net amount invested in Prize Bonds has almost doubled since the start of the new millennium. With greater awareness of the product and with low interest rates in the savings market generally, I expect this strong growth to continue," he said.