Prices to fill a 420 lb propane tank vary with the current propane price per gallon, fill method, and delivery costs. Typical costs hinge on gas price, distance, and whether the tank is customer-owned or part of a swap/auxiliary service. This guide gives practical USD ranges and the main cost drivers for U.S. buyers.
Assumptions: region, tank size 420 lb, standard residential refill, current propane market conditions.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Propane Gas | $1.85 | $2.65 | $3.50 | Based on ~4.2 lb per gallon; ~100 gallons for a 420 lb tank. |
| Delivery Fee | $0 | $20 | $60 | Distance and service window influence cost. |
| Fill Service Labor | $0 | $25 | $75 | Includes handling and testing pressure relief valve. |
| Taxes | $0 | $15 | $40 | State/local sales tax where applicable. |
| Contingency | $0 | $10 | $40 | Small buffer for price fluctuations. |
Overview Of Costs
The cost to fill a 420 lb propane tank generally ranges from around $230 to $450, with most customers paying about $300–$360 under typical market conditions. The main drivers are the propane price per gallon, the total gallons needed (about 100 gallons for a full 420 lb cylinder), and any delivery or service fees. Assumptions: region, specs, labor hours.
Cost Breakdown
The following table segments the main cost components for a standard residential refill. Prices reflect typical U.S. market ranges and include a small buffer for non-will-call delivery.
| Component | Low | Average | High | Notes |
|---|---|---|---|---|
| Propane Gas | $1.85 | $2.65 | $3.50 | Based on 4.2 lb per gallon; ~100 gallons for 420 lb tank. |
| Delivery Fee | $0 | $20 | $60 | Distance, scheduling window, and accessibility matter. |
| Fill Service Labor | $0 | $25 | $75 | Includes hose connection, testing, and safety checks. |
| Taxes | $0 | $15 | $40 | Applicable at point of sale. |
| Contingency | $0 | $10 | $40 | Price volatility buffer. |
Pricing Variables
Price is affected by several factors beyond base gas cost. Key drivers include per-gallon propane prices, fill method (customer-owned vs exchange), and delivery logistics. Regional price differences can be notable: some urban areas pay higher delivery fees, while rural zones may incur longer travel times, affecting total cost.
Regional Price Differences
Prices for a 420 lb refill vary by region. In the Northeast, delivery and gas costs can push totals toward the higher end of the range, while parts of the Midwest may sit closer to the average. The West often reflects similar patterns to the Northeast. Expect ±10–25% variation by region depending on supplier, demand, and distance from bulk storage.
Labor, Hours & Rates
Most refills involve a brief service call and safety checks rather than extensive labor. Typical service hours are under 1 hour, with labor priced in the $20–$75 range depending on the technician and any special handling required. Longer or multi-tank jobs may incur additional time and higher charges.
Additional & Hidden Costs
Hidden costs can include out-of-area delivery fees, after-hours surcharges, or equipment rental for special props. Ask for a written estimate that itemizes all charges. Exchange or swap options may carry different pricing than direct fills, potentially reducing gas costs but adding container fees.
Real-World Pricing Examples
Three scenario cards illustrate typical outcomes. Each scenario assumes a standard 420 lb cylinder and common residential service.
Basic Scenario
Specs: 100 gallons at $2.20/gal; distance minimal; standard delivery. Labor 0.4 hours. Totals: gas $220, delivery $15, labor $15, tax $12 → Total ~$262.
Mid-Range Scenario
Specs: 100 gallons at $2.70/gal; average distance; standard delivery. Labor 0.6 hours. Totals: gas $270, delivery $25, labor $25, tax $18 → Total ~$338.
Premium Scenario
Specs: 100 gallons at $3.10/gal; longer travel time or limited access; labor 0.9 hours. Totals: gas $310, delivery $40, labor $40, tax $28 → Total ~$418.
What Drives Price
Key factors include per-gallon price fluctuations, delivery distance, pickup versus delivery options, and seasonal demand. The tank size (420 lb) equates to roughly 100 gallons, so even small changes in gas price substantially impact total cost. Longer wait times or after-hours service can raise the final price.
Ways To Save
To reduce costs, compare quotes from multiple providers, consider scheduling during off-peak times, and inquire about bundled delivery or subscription pricing. If you already own the tank, direct fills generally cost less than exchange programs that add container fees. Ask for a line-item estimate before service.
