How Much Does a Lighted Sign Cost to Run Per Month in 2026

Most lighted signs are cheap to run: a small LED channel letter sign costs roughly 1 to 4 USD a month, an illuminated cabinet or pylon sign runs 5 to 30 USD, and a digital display or a traditional glass neon sign can hit 20 to 100 USD depending on size and hours. The number is simply watts converted to kilowatt-hours, multiplied by how long the sign burns and what your utility charges.

That is the honest answer for how much does a lighted sign cost to run per month, and the range is wide because two variables do most of the work: how many watts the sign draws, and how many hours a day it is lit. A 25 watt sign on a 12 hour timer and a 400 watt display running around the clock differ by more than a hundredfold on the same bill.

What follows is a breakdown by sign type, the formula to calculate your own figure in about a minute, and the levers that actually move the number. All costs here are typical US ranges in 2026. They vary by region, utility rate plan, sign specification and operating schedule, and they change over time, so treat them as planning figures rather than quotes.

How Much Does a Lighted Sign Cost to Run Per Month by Type

The table below uses a commercial rate of 0.15 USD per kilowatt-hour and two schedules: 12 hours a day (a sign that goes on at dusk and off at closing) and 24 hours a day (a gas station pylon, a convenience store, a marquee left burning overnight). Wattages are typical for a single sign face, not a whole multi-tenant plaza.

One important caveat before you plan around these numbers: the wattage on a spec sheet is usually the draw at full brightness, not the average across a night. Measured pulls often come in lower once a sign is dimmed or if only some faces are lit, and occasionally higher when a vendor has quietly overspecced the transformer.

Small LED Channel Letters: 10 to 40 Watts and About 1 to 4 Dollars a Month

A compact set of illuminated channel letters over a storefront door is the cheapest illuminated signage to operate. Five LED letters at 25 W total, running 12 hours a night for 30 days, use about 9 kilowatt-hours and land near 1.35 USD a month at 0.15 USD per kWh.

You get there lower with a photocell and a dimming schedule, and higher with halo lighting around each letter, multiple colors, or a sign that stays on overnight. Halo-lit channel letters run roughly double a standard face-lit set for the same footprint.

Illuminated Cabinet and Blade Signs: 40 to 120 Watts

A rectangular cabinet sign or a projecting blade sign pulls more than channel letters because the illuminated area is measured in square feet. A 3 by 5 foot cabinet with LED modules at 80 W, on a 12 hour timer, costs roughly 4.30 USD a month; double the wattage and you are near 6.50 USD.

The technology matters more here than anywhere else. A retrofit that swaps older fluorescent or neon illumination for LED modules typically cuts the draw by 60 to 80 percent, which on a sign running 16 hours a day saves 15 to 25 USD a month and pays for the conversion in well under a year. Longer operating hours push the cost up sharply, since every extra hour is another 2.4 kWh per month at 80 W.

Monument and Pylon Signs: 200 to 600 Watts and Up

Roadside signs are the first place where a lighted sign stops being a rounding error. A monument sign with one illuminated letter set at 150 W costs around 16 USD a month on a 12 hour schedule and 32 USD running all night. A freestanding pylon with three lit faces at 400 W reaches about 43 USD a month at 12 hours and 86 USD at 24 hours.

Two controls matter more than any equipment choice at this scale. A timer that shuts the sign down from 1 a.m. to 5 a.m. removes roughly 40 percent of a night of runtime for the same hardware, and a photocell that keeps the sign dark in daylight stops a timer that drifted out of sync from lighting an unoccupied roadside at noon.

How Much Does a Neon Sign Cost to Run Per Month?

Glass neon is the expensive end of the neon question, and the answer depends on which neon you mean. Traditional glass tube runs about 20 watts per foot of lit tube; LED neon flex, the modern look-alike tubing, runs roughly 1.2 watts per foot. That is a ratio of about 15 to 1, and it is why LED neon flex has replaced real glass in most new commercial work.

Working it through: a 6 foot glass neon sign at 20 W per foot is 120 W, which is 2.88 kWh a day at 12 hours and about 13 USD a month at 0.15 USD per kWh. A single-color LED neon sign of the same size, at 1.2 W per foot, comes in near 7 W and costs under 1 USD a month. A large multicolor facade piece with 20 feet of tubing, transformers and arrow effects can reach 400 W and 43 USD a month at 12 hours, or 86 USD around the clock.

Electricity is only part of the running cost of real neon. Glass tubes, transformers and ballasts have service lives measured in years rather than decades, and labor to reach a sign on a facade is not cheap. Multiply that by the 30,000 hour figure commonly quoted for glass neon tubes against roughly 100,000 hours for LED neon flex, and the total cost of ownership gap is wider than the electricity gap alone.

Digital and High-Impact Signs: Where the Bill Jumps

Digital LED message displays are the highest consumers on this list, and brightness is the dial that decides the bill. A small indoor or window display at 80 W running 18 hours costs about 7 USD a month. A 4 by 8 foot outdoor display at 400 W, set to full brightness and running 24 hours, costs roughly 86 USD a month on its own.

Brightness control is the single biggest lever here. A display running at half brightness typically draws around half the power, and scheduled dimming after closing hours is standard practice on commercial message boards. Color-changing and animated content pushes draw higher than static text because more pixels are lit at once.

What Affects the Price

Everything above comes out of one formula, and once you have it you can price any sign without asking a vendor.

Step 1: watts to kilowatts. Divide the sign’s wattage by 1,000. A 300 W sign is 0.3 kW.
Step 2: kilowatts to kilowatt-hours. Multiply by hours per day, then by 30 for a month. 0.3 kW at 12 hours a day is 3.6 kWh a day, or 108 kWh a month.
Step 3: kilowatt-hours to dollars. Multiply by your rate per kWh. 108 kWh at 0.15 USD is 16.20 USD a month.

That same 300 W sign looks very different depending on schedule and rate, which is why a single “average” number is misleading:

Businesses usually pay more per kilowatt-hour than homes do, often 30 to 60 percent more, because the utility covers demand charges, delivery infrastructure and a different tax structure. If your sign sits on a commercial account, use the commercial rate, not the residential rate you remember from home.

Where to find your rate. On a commercial utility bill, look at the current usage summary: one line shows total kWh used, the next shows the dollar amount charged, and the total charges divided by total kWh gives your effective rate per kWh. Some bills list a base energy charge plus a fuel adjustment; dividing the full charge by total usage handles both. Tariffs with time-of-use pricing need a weighted rate, which means costing your sign at each period’s rate separately.

Verify the wattage. Nameplate wattage is a starting point, not a measurement. A smart plug with energy monitoring on the sign’s circuit gives you actual kilowatt-hours per hour, and a clamp meter around the circuit conductors gives instantaneous current. Owners who have metered their own signs generally trust the meter more than the brochure, since advertised wattage is rarely qualified as full-brightness only, per tube or per sign.

Beyond wattage and hours, these are the variables that move the number:

• Size and lit area. Cost scales roughly with square feet of illuminated face, so a doubled sign face is close to double the cost.
• Lighting technology. LED modules and LED neon flex draw a fraction of fluorescent, incandescent or glass neon for the same brightness.
• Color count. Every added color in a neon piece means more transformers, more electrodes and more power.
• Brightness and dimming. On a dimmable 120 W sign at 12 hours a day, full brightness runs about 6.50 USD a month, half brightness about 3.25 USD, and a quarter brightness near 1.60 USD.
• Controls. A timer and a photocell change runtime more than any hardware upgrade, and most new commercial signs ship with both.
• Weather exposure. Outdoor fixtures are sealed for moisture and temperature, and that sealing does not change wattage, but it does change service life and therefore replacement cost.
• Maintenance. A failed driver or transformer on a sign running 20 hours a day costs more in lost trade than in electricity, which is an argument for scheduled checks.

One trade-off deserves a note. Frequent on-off cycling wears out transformers, and sign owners often report that leaving a sign powered continuously produces fewer transformer failures than switching it every evening. The electricity saving from overnight shutdown is real; weigh it against expected transformer life before deciding.

Ways to Save on Sign Electricity

Cutting the hours is the cheapest saving and the one most signs skip. A dusk-to-dawn photocell plus a timer that runs the sign from sunset to 11 p.m. instead of sunrise removes a third to a half of a night of runtime with hardware that costs very little.

Dimming after closing hours is the next best lever, and the reduction is substantial: brightness reduction on LED signage routinely cuts consumption by 90 percent or more compared with full output, because LED output scales with current. On a 400 W display, dropping to a quarter brightness overnight takes the load from about 86 USD a month to roughly 22 USD.

An LED retrofit on an existing cabinet or monument sign usually reduces draw by 60 to 80 percent. The conversion is an upfront expense, so the honest way to judge it is payback months: divide the retrofit cost by the monthly saving. On a cabinet sign saving 18 USD a month, a retrofit that costs a few hundred dollars pays for itself inside a year.

Then there is the maintenance angle. A sign that fails at 9 p.m. on a Friday costs you a service call, a truck roll and lost visibility. Replacing drivers and transformers before they fail, and cleaning lenses so the sign draws full output without overdriving the modules, is a cost control measure even though it never shows up on the electricity bill.

Two bigger swings are worth knowing about. Comparing commercial rate plans, or moving a load onto a different meter, occasionally pays for signage electricity in one afternoon of reading tariffs. And for low-wattage signs on remote frontage, solar with battery storage can remove the utility connection entirely, though the payback math depends on local sunlight, install cost and whether a sign is allowed to run without grid power under local code.

Frequently Asked Questions

Conclusion

Most small LED signage runs 1 to 4 USD a month, cabinet and pylon signs land between 5 and 30 USD, and digital or glass neon displays can reach 20 to 100 USD on a commercial rate. The sign itself is rarely the deciding factor in a storefront energy budget, but a large display running around the clock is a real line item worth budgeting for.

Start by reading the wattage on the nameplate or spec sheet, then divide by 1,000, multiply by your daily hours and 30, and apply your commercial rate per kWh. If you want a firmer figure than a planning range, plug the sign into a smart plug and let it meter itself for a week. Before you replace lighting or install anything larger, get a written quote that states expected wattage and daily runtime in writing, since those two numbers determine both your bill and your sign’s service life.