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Hands up if you've made some secret guilty purchases in the last year.
Chances are you have and, according to a recent survey, your total spending on such purchases was around $2700. 
The finder.com.au survey of 1,035 respondents found Australians spend more than $11 billion every year on guilty habits they keep to themselves.
Clothes, gambling, guilt foods, adult entertainment and cigarettes came in at the top of secret purchases made, with women more than twice as likely to hide clothing purchases than men.
Gambling and adult entertainment were the most common secret spending outlets for men.
"Hiding purchases from a partner might seem harmless, however it's a deceptive habit worth breaking for the sake of your relationship," said Bessie Hassan, money spokeswoman at finder.com.au.
"If we earn it, do we have the right to spend it however we choose?" she said, adding that some Australians would be "very stunned" to learn their partner's spending habits.
The survey found, on average, Australian men spent $4596 on purchases they did not reveal to their partner, while women spent $1476.
Generation Y, aged 18-35, held the largest debt from secret spending at $2054, topping Generation X with $1173, and Baby Boomers with a mere $318.
In order to make their secret purchases, 44 per cent of those surveyed used cash, followed by 26 per cent who used credit cards, while 17 per cent used debit cards.
Ms Hassan said many people keep secret credit cards from their partner, to support their guilty spending habits.
According to the Reserve Bank, Australian owe $50.8 billion across 16.3 million credit cards.
Money editor at RateCity, Sally Tindall, said the best way to minimise debt is to pay off credit cards in full every month.
"However, if you're not someone that can do this, look for a low rate card with no annual fee," she said.
"Alternatively you can look at balance transfers, however if you don't pay off the balance in full by the end of the period you will end up in more trouble than you started."