Tankless Water Heater Installation cost: Billings vs Great Falls (2026)
The two metros aren't quite in sync on tankless water heater installation: Billings sits 1% above Great Falls, or roughly $4,200 versus $4,150 — about $50 apart.
Billings MT
Typically around $4,200
Great Falls MT
Lower costTypically around $4,150
Billings vs Great Falls: full breakdown
| Factor | Billings | Great Falls |
|---|---|---|
| Typical 2026 cost | $4,200 | $4,150 |
| Estimated range | $2,650–$5,700 | $2,600–$5,650 |
| Labor index (vs US) | ×0.96 | ×0.95 |
| Climate zone | Cold | Cold |
| Climate factor | ×1.04 | ×1.04 |
| Local permit | $150 | $125 |
| Labor share | $2,300 | $2,300 |
| Materials/equipment | $1,900 | $1,850 |
All figures are 2026 localized planning estimates for tankless water heater installation — get an actual quote before you commit.
Is the gap worth worrying about?
1% is within noise for tankless water heater installation — contractor selection and timing move the price more than which of these two metros you're in.
Tankless water heater installation by type: Billings vs Great Falls
Below, each tankless water heater installation option is priced independently for both cities, with identical local labor, climate and permit logic applied — so the comparison holds up.
| Type | Billings | Great Falls |
|---|---|---|
| Gas tankless | $3,150–$6,600 | $3,100–$6,550 |
| Electric tankless | $1,850–$3,350 | $1,800–$3,300 |
Treat these as 2026 localized estimates for tankless water heater installation, not quotes from a contractor.
Tankless water heater installation by flow rate (GPM): Billings vs Great Falls
Tankless units are sized by flow rate — gallons per minute (GPM) — rather than tank size. Add up the fixtures you'd run at once: a shower is ~2 GPM, so a larger household needs a higher-GPM unit (or two).
| Size | Billings | Great Falls |
|---|---|---|
| 5–7 GPM (1–2 people, 1 bath) | $2,350–$4,350 | $2,300–$4,300 |
| 7–9 GPM (2–3 people, 2 baths) | $2,750–$5,000 | $2,700–$4,950 |
| 9–11 GPM (3–4 people, 2–3 baths) | $3,150–$5,500 | $3,100–$5,450 |
| 11+ GPM (5+ people / whole-home) | $3,650–$6,000 | $3,600–$5,950 |
These are 2026 planning figures for tankless water heater installation, localized to each city — not formal quotes.
Cheapest time for tankless water heater installation in either city
Tanks fail most in winter when incoming water is cold and demand is high — emergency-rate territory. Replacing a 10+ year-old unit proactively in a slow month avoids the premium.
Tank or tankless — and what should you budget?
Tank, tankless or heat-pump — the format you pick shapes the bill today and the utility bill for years after. Our editors weigh the trade-offs.
The simple-swap case
If your current tank suits your household and the budget is tight, a like-for-like tank replacement is the cheapest, fastest job — no gas-line or panel upgrades, done in a morning.
The tankless case
Tankless costs more upfront and may need a gas-line or electrical upgrade, but it lasts longer, never runs out of hot water and trims standby energy loss — strongest for larger households planning to stay put.
The heat-pump case
A heat-pump (hybrid) water heater costs the most upfront but slashes operating cost and earns the strongest utility rebates where offered — the long-run winner where the install location suits it.
There's no universally "best" water heater — only the one that fits your budget and timeline. Tight budget, go tank; want endless hot water, go tankless; optimizing for the lowest bill, go heat-pump.
Billings vs Great Falls
Is tankless water heater installation cheaper in Billings or Great Falls?
Great Falls wins on price: tankless water heater installation runs about $4,150 there versus $4,200 in Billings, a gap of roughly $50 (1%) as of 2026.
Why does tankless water heater installation cost more in Billings than Great Falls?
The main driver is local labor rates: Billings's labor index is 0.96 versus 0.95 in Great Falls. Climate zone (cold vs cold) and permit fees also shift the total.
How much is tankless water heater installation in Billings, MT?
Expect to pay $2,650 to $5,700 for tankless water heater installation in Billings in 2026, averaging around $4,200.
When is the cheapest time to buy tankless water heater installation — and does it differ by city?
No, the seasonal pattern is the same in Billings and Great Falls: book during Spring and early fall for about 5–10% in savings. Deep winter (failure season) is the priciest stretch in both cities, mostly due to emergency replacements.
Should I choose where to live based on tankless water heater installation cost?
Probably not. Yes, $50 is a real gap, but it's a one-time cost you can partly offset in Billings with off-season timing and tighter bids. Long-term factors like energy prices and home condition matter more than this one number.
Compare tankless water heater installation in other cities
Updated June 2026 · By Serhat Özçelik