💰 Live Calculator
Hot Water System Cost Calculator
Compare running costs and find out when it's time to replace your hot water system
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Hot water heating accounts for up to 25% of your energy bill. Our calculator shows your current running cost and how much you could save by switching to a modern system.
Hot Water System Running Cost Calculator
Discover how much your hot water system costs to run — and how much you could save by upgrading.
⏱ Takes 30 seconds
Your system costs approximately
$0
per year to run
Switching to a heat pump saves you:
Over 10 years: net savings after replacement
Payback period:
10-Year Running Cost Comparison
Your current system
Heat pump (incl. install)
✅ New hot water system supply + install: $1,211–$2,849
Based on current Sydney SOR rates for heat pump installation
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Older systems often hide slow leaks that cost more than the system itself. Check your hidden leak damage cost →
Frequently Asked Questions
Systems over 10 years old are significantly less efficient. Over 15 years, replacement is usually more cost-effective than ongoing repairs.
Heat pump systems are typically the cheapest to run — around $180/year vs $950/year for an old electric storage system.
Thinking about replacing your hot water system?
Get a free video assessment — our plumber will confirm the right system for your home.
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