Buying a hot tub isn’t just about the upfront price tag. Running costs can sneak up on you if you’re not prepared. Electricity, water, chemicals, and maintenance all add up. So, how much does it really cost to keep your tub bubbling? Let’s break it down.
1. Electricity Costs
Heating the water and keeping it hot is the biggest expense.
- Inflatable Hot Tubs: $30–$60 per month (less insulation, so they burn more power).
- Hard-Shell Hot Tubs: $20–$50 per month (better insulation + efficient heaters).
Tip: Use a high-quality cover and drop the temp when not in use to save money.
2. Water Costs
Hot tubs need refilling every 3–4 months. A typical 300–500 gallon tub will add just a few bucks to your water bill each refill.
- Average Refill Cost: $3–$10 (depending on local water rates).
Not a dealbreaker but don’t forget it.
3. Chemicals & Water Treatment
Keeping water clean and safe requires sanitizers, shock, pH balancers, and test strips.
- Monthly Chemical Cost: $15–$30.
Tip: Buy chemicals in bulk and keep a consistent maintenance schedule to avoid bigger (and more expensive) issues later.
4. Maintenance & Repairs
Filters, covers, and parts don’t last forever.
- Filters: $20–$50 each (replace every 12–18 months).
- Covers: $200–$400 (lasts 3–5 years).
- Repairs: Can range from $100 (pump fix) to $1,000+ (major parts replacement).
Plan for at least $100–$300 per year in basic upkeep.
5. Total Monthly Costs
So, putting it all together:
- Inflatable Hot Tub: $50–$100 per month.
- Hard-Shell Hot Tub: $40–$80 per month.
Annual cost averages $500–$1,200, depending on your setup and climate.
Is It Worth It?
If you use your tub regularly, the cost is comparable to a gym membership or occasional spa trips except you get the convenience of relaxing anytime at home.
Bottom line: A hot tub isn’t free to run, but with smart maintenance and energy-saving habits, it’s way more affordable than most people think.
Next Step
Before buying, check out our [Buyer’s Guide] to learn how to pick an energy-efficient tub that won’t drain your wallet.