Only last night I had a calm but measured discussion with my husband about how much energy we were using and how we could be saving stacks if we'd properly use our off-peak energy tariffs. He turned on the dishwasher (in peak time) and ignored me!

It seems I'm not alone in my hand-wringing and passive aggressive 'reminders' over the skyrocketing costs of energy. New research from energy comparison service iSelect reveals eight in 10 Australians have argued with someone they live with about energy use, with younger adults and Victorians among the most likely to clash over everyday habits.

The survey of 1,009 Australians, conducted by research firm PureProfile in January 2026, highlights how commonplace these disagreements have become and sheds light on the behaviours that spark the most tension in homes across the country.

Lights, laundry and air conditioning: Top triggers for tension

At the top of the list are seemingly minor but persistent disputes about leaving lights on in empty rooms. Almost a quarter (22.8 per cent) of households report regular disagreements about lighting, making it the most widespread everyday source of energy conflict.

Ironically, turning off lights only saves about $1.86 per year, a stark reminder that some arguments may be more about habits and personalities than dollars and cents.

Close behind are rows over heating and air-conditioning, with 22.2 per cent of households regularly at odds over indoor temperature preferences. This is a surprisingly common flashpoint, particularly as previous research from iSelect shows that running a reverse-cycle air conditioner can cost up to $1,500 a year in energy bills, making it one of the most expensive appliances in the home.

Laundry habits also feature prominently. A similar proportion of respondents (22.9 per cent) report frequent disputes over washing machine use, making laundry one of the most contentious energy-related behaviours.

Water use, especially long showers, also generates conflict: nearly one in five households (19.3 per cent) argue regularly about shower length or frequency. Interestingly, bath usage is the least likely to be disputed, though it still draws complaints in more than one in 10 homes (12.8 per cent).

Who's most likely to argue?

The data also reveals demographic patterns in these disagreements.

Men, for instance, are more likely than women to report disputes across most energy behaviours, especially when it comes to cooking methods, appliance use, and heating and cooling. Researchers suggest this could stem from differences in how men and women prioritise comfort versus cost, or simply greater willingness among men to voice their opinions on household energy use.

Generational differences are even more striking. Younger Australians are significantly more likely to clash over energy use than older Australians, in some cases up to 10 to 15 times more likely than those over 65 to argue about issues such as showers, gaming, and device charging. This trend likely reflects lifestyle differences and living arrangements, especially given that younger adults are more likely to live in shared houses where bills are split and interpretations of "fair use" vary widely.

Victoria leads the nation in energy arguments

Geographically, Victoria emerges as the hotspot for energy bill arguments. The state recorded the highest rates of regular conflict across nearly every energy behaviour surveyed. Victorian households are especially likely to argue about dishwasher use, with 28.9 per cent reporting disputes, compared with roughly 17 to 18 per cent in other states. Heating and cooling disagreements are also far more common in Victoria (27.4 per cent) than in states such as South Australia (16.9 per cent).

This finding is somewhat surprising given previous research showing Victoria typically has one of the lowest electricity prices in Australia, while states like South Australia have among the highest. But the data suggests that lower prices don't necessarily mean less household tension, possibly because differences in lifestyle and household expectations play a major role.

Julia Paszka, general manager utilities at iSelect, says the findings reflect wider cost-of-living pressures and the tension between comfort and cost. "With cost-of-living pressures, it's no surprise that energy bills are a source of tension in many households," she said. "Bill payers want to save wherever they can, while others prioritise comfort; these small disagreements can impact happiness and wellbeing."

Ms Paszka stresses that while small behavioural changes, like turning off lights or drying clothes outside, can help reduce bills, reviewing the household energy plan could also ease some of the financial strain and friction. Comparing energy providers and switching to a cheaper plan might offer savings without sacrificing comfort, she suggests.

As Australians contend with rising energy costs with household electricity prices rising faster than inflation in recent years, the debate over how to use power wisely is becoming more heated than ever.

In the meantime, I'll continue to fight the good fight and put the dishwasher on at midnight.

This article was originally published from view.com.au and appears with permission.

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"Turn off the lights!" Top triggers for family energy arguments