The honest cost

How much does a Green Iguana cost to keep?

The honest answer: the green iguana itself is usually the cheapest part. Here's what it really costs — the upfront setup, the ongoing monthly costs, and where it's safe to save vs never cut corners. We don't quote prices (they vary by country, currency and month) — we show you what you're paying for and where the money actually goes.

💷 Upfront — the one-time setup

What you need before the green iguana comes home. The setup, not the animal, is the real cost of entry.

The enclosure: Sized for an adult (Adults need a custom, room-sized, VERTICAL enclosure, not a fish tank. Plan for a minimum around 10 ft long x 5 ft wide x 6 ft tall (3 x 1.5 x 1.8 m); an ideal build is closer to 12'L x 6'W x 6'H. As a rule of thumb, length should be at least twice the iguana's body length and height at least 6 ft, because these are arboreal climbers who need to get UP. Fill it with sturdy, thick climbing branches and broad basking shelves that can hold a 15-20 lb animal, plus solid smooth walls (no wire mesh they can rub their snouts raw on). Because iguanas soak and even swim, include a large, shallow water/soak area big enough to fit the whole body, at room-to-lukewarm temperature; change it daily and disinfect weekly. Hatchlings can start in a temporary 20-55 gallon setup but will outgrow it within a year, so budget for the adult space before you buy.). This is almost always the single biggest one-time cost — and the one people most often under-buy. Buying too small twice costs more than buying right once.
Heating + a thermostat: A heat source, plus a THERMOSTAT to control it. The thermostat is the one heating item you never skip — it is what prevents fatal burns and overheating.
UVB lighting: A UVB tube and its fixture (STRONG UVB is non-negotiable for this rainforest baskers. Use a high-output linear T5 HO tube (e.g. Arcadia 12-14% or Zoo Med Reptisun 10.0), spanning much of the enclosure, mounted so the basking zone reads a UV Index (UVI) of about 3.0-4.0. With mesh in the path, that is roughly 13-24 inches from the animal depending on the bulb, so measure with a Solarmeter rather than guessing. Run it 10-13 hours a day and replace tubes on schedule (about every 6-12 months) since UV output fades long before the light dies.). Budget from day one to REPLACE the tube on schedule — it stops emitting usable UVB long before it stops making visible light, so it is a recurring cost, not a one-off.
Substrate, hides & décor: The substrate (Use a safe, absorbent substrate: a 2-4 inch (10-15 cm) layer of large-particle coconut husk or cypress mulch works well for holding humidity, or go simple with pelleted paper bedding or reptile carpet for easy cleaning. Avoid loose sand, fine particles, pine, and cedar (impaction and respiratory irritation risk). Spot-clean daily and refresh regularly.), plus hides and enrichment. This is where you CAN save — cork bark and DIY décor work as well as branded resin.
Measuring gear: A thermometer, a hygrometer, and ideally a temperature gun. Cheap, but you genuinely cannot run the setup safely by guesswork — this is a buy, not a maybe.
The animal itself: Usually the SMALLEST line on this whole list. The price of the animal tells you almost nothing about the cost of keeping it well.

🔁 Ongoing — the part people forget

The costs that keep coming for the animal's whole life (15-20+ years is normal with good care, with exceptional well-kept individuals reaching into the low 20s. Sadly most captive iguanas die far younger from preventable husbandry failures (kidney disease, metabolic bone disease). This is a decades-long commitment on par with a dog or cat.).

Food & supplements: Its diet (100% herbivore (folivore). The whole diet is plants: roughly 60-70% dark leafy greens (collard, dandelion, mustard greens, turnip greens, kale in rotation, escarole, watercress), about 20-30% other vegetables (squash, bell pepper, green beans, snap peas, grated carrot), and only about 10% fruit as a treat (berries, mango, papaya). NEVER feed animal protein, insects, dog or cat food, or "monkey biscuits." This is critical: iguanas are strict vegetarians in the wild, and animal protein is a leading cause of fatal kidney disease and gout in captive iguanas. Offer fresh food daily and remove uneaten produce before it spoils.), plus supplements (Because captive greens rarely match wild browse, dust food with a calcium supplement and use a reptile multivitamin. A common schedule for growing iguanas is plain calcium (no phosphorus) several times a week plus a multivitamin a couple times a week; adults need less. An all-in-one herbivore supplement (e.g. Repashy SuperVeggie) at meals is a convenient option. With proper UVB you generally do NOT need heavy D3 dosing, but calcium is essential to prevent metabolic bone disease. When in doubt, ask your exotics vet to tailor the schedule.). Modest per month, but constant for the animal's whole life — and this species can live 15-20+ years is normal with good care, with exceptional well-kept individuals reaching into the low 20s. Sadly most captive iguanas die far younger from preventable husbandry failures (kidney disease, metabolic bone disease). This is a decades-long commitment on par with a dog or cat..
Electricity: The hidden monthly cost: heating, UVB lighting runs continuously. Over a year the power bill can quietly rival the food bill — and it scales with a bigger, correct enclosure.
Consumables: The recurring replacements: UVB tubes, fresh substrate, supplements. Small, regular, easy to forget when you budget.
Vet care: An annual exotic-vet check, plus an emergency fund. Exotic vets cost more than a cat/dog vet, reptiles hide illness until it is advanced, and one emergency can dwarf a year of every other cost. Find a reptile vet BEFORE you need one.

✅ Worth the money

Do you have the room for a 6-foot-tall, roughly 10-12 foot long custom enclosure (often a converted closet or a whole wall)?
Can you commit for 15-25 years, through moves and life changes?
Is there a qualified reptile/exotics vet within reach, and can you afford exotic vet bills?
Can you provide a constant supply of fresh dark leafy greens and vegetables, every day, for decades?
Are you ready to run strong UVB and heat (and the electricity bill that comes with a big warm enclosure)?
Are you comfortable handling a powerful adult with claws, a whip tail, and a strong bite, including a male that may turn territorial in breeding season?

🟡 Save your money

Branded all-in-one "starter kit" tanks — they are usually too small for an adult, so you pay twice.
Compact / coil UVB bulbs — a linear tube gives better, more even coverage for the money.
Decorative resin ornaments — cork bark, branches and DIY hides do the same job for less.
Vitamin/tonic gimmicks beyond the supplements your care sheet actually calls for.

⛔ Never buy

Never feed animal protein, insects, or dog/cat food — it causes fatal kidney disease and gout in this strict herbivore.
Never keep an adult in a fish tank or any undersized, horizontal cage; they need a huge vertical space.
Never skip UVB or rely on a supplement instead of proper lighting.
Never house two iguanas together (especially males) — territorial fighting is common and can be lethal.
Never let the enclosure get cold at night or run without a verified thermal gradient.
Never use loose sand or fine/aromatic (pine, cedar) substrates that risk impaction or respiratory harm.
Never release an unwanted iguana outdoors — rehome through a reptile rescue instead.

These are on this species' "never" list in our care sheet — cheap, common, and harmful.

The one rule on cost: budget where it's safe — a second-hand enclosure, DIY décor — but never cheap out on the thermostat, the UVB, the vet fund. Those are where cutting corners costs the green iguana its health, and usually costs you more later. We don't quote prices — check current prices where you live; this is what to budget for.

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Cost questions

How much does a green iguana cost to keep?

More than it costs to buy — the animal is usually the cheapest part. The real cost is the setup (the enclosure, heating + a thermostat, UVB lighting, substrate and measuring gear), then the ongoing food, electricity, consumables and vet care. We don't quote a figure because prices vary a lot by country, currency and month — instead this page shows exactly what you're paying for and where the money goes, so you can price it up locally.

What are the ongoing monthly costs of a green iguana?

Food and supplements, electricity for the equipment that runs 24/7, recurring consumables (UVB tube replacements, substrate), and — the big variable — vet care: an annual check plus an emergency fund. Reptiles live a long time (15-20+ years is normal with good care, with exceptional well-kept individuals reaching into the low 20s. Sadly most captive iguanas die far younger from preventable husbandry failures (kidney disease, metabolic bone disease). This is a decades-long commitment on par with a dog or cat.), so these small monthly costs add up over the animal's life.

Why does the setup cost more than the green iguana itself?

Because you're not buying an animal — you're recreating its whole environment. A green iguana needs its space, controlled heat, the right UVB, and stable conditions, and that equipment is where the money goes. The purchase price of the animal tells you almost nothing about the cost of keeping it properly.

Where can I save money on a green iguana — and where shouldn't I?

Safe to save: a second-hand enclosure, DIY or cork-bark décor instead of branded resin, and skipping "starter kit" bundles. Never cut corners on the thermostat, the UVB, or the vet fund — those three are where saving money costs the animal its health, and usually costs you more later.