Broken televisions, soiled clothes and bags of sand are becoming regular features at charity bins throughout the capital.
Illegal dumping has been an issue for charities such as the Lone Fathers Association, whose president Barry Williams said receiving junk was a daily occurrence at this time of the year.
"You clean them up and turn your back, it's done again," he said.
"People just won't stop."
The charity operates approximately 80 bins throughout the capital, which were designed for clothing but have become homes for everyday rubbish, broken electronics and bags of grass.
Despite attempts by the ACT government to curb illegal dumping, including the removal of charity bins in the suburbs and recent blitzes carried out by city rangers, Mr Williams said the problem was still widespread throughout the capital.
He said the introduction of security cameras or increasing the fine for illegal dumping may succeed where other initiatives have failed. "We're spending most of our week taking rubbish to the dump," Mr Williams said.
"Anything up to a tonne a week, and we have to pay for that."
Charities such as the Salvation Army are also facing huge costs associated with illegal dumping, spending up to $5 million a year dealing with unusable donations.
The Salvos are also urging people not to deposit good quality donations at stores outside opening hours as they could be stolen or damaged by rain. NSW stores chaplain Major Robert Sneller emphasised the increased pressure staff were under during the January holiday period.
"We ask our donors to be mindful of this fact when making their donations," he said.