Water Heater Replacement Cost Calculator

Heat Pump Water Heater (HPWH) wins on 10-year operating cost in most climates: $1,500-$3,500 install + ~$130-$200/yr operating = $2,800-$5,500 total. Electric tank: $1,200-$2,300 install + $400-$600/yr = $5,200-$8,300. Gas tank: $1,500-$3,000 install + $250-$400/yr = $4,000-$7,000. Tankless gas: $2,500-$5,500 install + $180-$300/yr = $4,300-$8,500. HPWH wins despite higher upfront because energy use is 60-70% less than electric resistance.

Two stacks: (1) Federal Section 25C tax credit - 30% of installed cost up to $2,000/year for HPWHs meeting Energy Star efficiency tiers; (2) HEEHRA rebate (high-efficiency electric home rebate) - up to $1,750 for households under 150% of area median income, capped at 50% project cost for moderate-income, 100% for low-income. State-by-state rollout through 2026 - check your state energy office. Stack-able with utility rebates ($200-$800 common).

Tankless (gas typically) wins for: small-to-medium households, long-term occupants (lasts 20+ years vs tank's 10-12), endless hot water, space savings. Tankless loses for: large-simultaneous-demand households (running dishwasher + 2 showers at once exceeds capacity), upfront cost ($2,500-$5,500 vs $1,500-$3,000 tank). Gas tankless also requires upgraded gas line + dedicated venting, adding $500-$1,500.

Like-for-like replacement (same fuel, same location): 2-4 hours. Fuel switch (gas → electric or vice versa): 4-8 hours, may require new circuit + breaker (electric) or gas line + venting (gas). HPWH install: 4-6 hours, needs 240V circuit and condensate drain. Tankless installation: 6-10 hours due to venting + gas line upsize requirements. Most installers permit + pull electrical/plumbing separately.