Salvos Tasmania store area manager Alison Clements said from November each year dumping at their charity bins became a major problem as people cleaned out their homes around Christmas.

It is estimated that weekly tip bill visits cost hundreds of dollars as the Salvos remove tonnes of rubbish from their 11 stores statewide.

Nationally, the annual bill runs into the millions.

``It would be of a lot more benefit for us, if people just got rid of their unwanted goods properly,'' Ms Clements said.

``We understand the cost involved of taking things to the tip because we have to pay for it every week, so we understand that is a factor but we also don't receive any subsidy from the government.

``That's something that we're hoping may eventuate, but who knows.''

Charities in most other states receive state government subsidies to dump unwanted goods placed at their bins.

Ms Clements said Legana, which has two charity bins, was the worst place for dumped junk and also for scavengers going through bags left next to the containers.

She said although a lot of the items would be suitable to sell or give to those on welfare, once they were left exposed to the weather or damaged, they had to be thrown away.

The Invermay store often received a lot of broken furniture or larger household items dumped after hours, she said.

On the upside, Boxing Day often resulted in an influx of new clothes and other gifts that people wanted to get rid of quickly, she said.

Ms Clements recommended people drop their unwanted items into stores during opening hours if a charity bin was full.