Koi fish usually cost about $10 to $50 for small, common fish, while larger or higher-quality koi can run $100 to $500+ , and show-grade or rare koi can reach thousands to tens of thousands of dollars.

Quick Scoop

A simple pet-store koi is often the cheapest option, while breeder-quality koi cost more because of size, pattern, genetics, and color quality. One pricing guide notes domestic koi around $10–$17 , large butterfly koi around $30–$660 , and rare large koi from $100–$2,500. Another source says large koi over 24 inches can range from $3,500 to $50,000+ , with championship-level fish going even higher.

Typical price ranges

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Type Usual price range
Small/common koi $10–$50
Mid-size koi $100–$300
Large koi $500–$2,500+
Show-quality / rare koi $10,000 to $200,000+

What changes the price

  • Size matters: bigger koi cost more.
  • Color and pattern matter: rarer, cleaner patterns are pricier.
  • Bloodline matters: Japanese champion-line koi can be much more expensive.
  • Source matters: local breeders are usually cheaper than imported koi.

Extra costs

The fish is only part of the budget. A pond, filtration, water treatment, food, and routine care can cost more than the koi themselves over time.

Bottom line: if you want a nice pond fish, plan on roughly $20–$150 per koi for many common options, but serious collector koi can become a luxury purchase.