Your Light Bill Rose $10.75 a Month on July 1: How to Read It and Lower It

The bill goes up again this summer

Since July 1, 2026, electricity is more expensive in Puerto Rico. The Puerto Rico Energy Bureau (NEPR) approved a 1.34 cents per kilowatt-hour (kWh) increase in fuel and power-purchase charges, in effect through September 30 ¹². For a household using about 800 kWh a month, that means $10.75 more on the bill, a 4.9% jump over the prior quarter ¹. The average residential rate now sits around 28.5 cents per kWh, among the highest under the U.S. flag.

The silver lining: LUMA Energy had asked for 2.34 cents per kWh, but the Bureau cut it to 1.34 cents after reviewing the numbers ¹². We still pay more.

Why it went up: fuel drives the bill

The increase comes from the fuel and power-purchase adjustment, not a whim. The price of the oil the system burns went from roughly $76.62 a barrel in March to $91.42 in May, and that cost passes straight to your bill ¹. Every time generation plants fail and pricier fuel has to be burned, ratepayers foot the bill.

Beyond this quarterly adjustment, in April the Bureau redesigned the base rate: instead of approving the huge increase requested by LUMA (~$1.9 billion), Genera PR (~$460 million) and PREPA, it chose to redistribute costs ³. The practical result: a higher fixed monthly charge and slightly less per consumption. The residential fixed charge is around $8 a month in 2026 and is scheduled to climb toward about $16 monthly by 2028 ³. Translation: even if you shut everything off, you already pay a higher base.

How your bill breaks down

Your bill is not a single number. Watch these lines:

• Basic / fixed charge: you pay it no matter what, whether you use a little or a lot.
• Energy charge (kWh): what you consume, cents per kilowatt-hour.
• FCA (fuel adjustment): the piece that rises with oil.
• PPCA (power purchase): what it costs the system to buy generation.
• FOS (fuel subsidy): a factor tied to the subsidy.

Those last three are what changed on July 1 ¹².

What it means for you

If your usage is high from summer air conditioning, you will feel a bigger hit than $10.75, because that figure is for 800 kWh. Many island households top 1,000 kWh in July and August. Half of your summer bill is usually the AC. The flip side: since a larger share is now a fixed charge, cutting consumption lowers your bill a bit less than before, but it is still worth it for every kilowatt you avoid.

How to lower it / Checklist

1. Set the AC to 74-75°F. Each degree below the optimal point raises consumption 1% to 3% ⁴. Dropping from 72°F to 60°F can spike usage by up to 36%.
2. Use "Dry" (dehumidifier) mode on humid days: it cools using less energy than cool mode ⁴.
3. Switch to an Inverter-type AC if yours is over 10 years old: it uses 30% to 50% less ⁴.
4. Claim the LUMA rebate. The Home Efficiency Rebate Program pays between $60 and $750: up to $750 for an efficient air conditioner and up to $550 for a solar water heater ⁵. Submit within 90 days of purchase; the check arrives in 4 to 6 weeks ⁵. Info: lumapr.com/home-efficiency-rebate-program.
5. Seal cold-air leaks at doors and windows; swap old bulbs for LEDs and unplug what you are not using ⁴.
6. Ask about the free efficiency kit and LUMA's in-store discounts. Phone: 1-844-888-5862 ⁵.
7. Compare your usage month to month on LUMA's portal to catch the appliance driving up your bill.

What's next

The fuel adjustment is reviewed every quarter, so the next change lands around October 1, 2026, and will depend on oil prices and how the plants behave. The fixed charge, meanwhile, will keep climbing toward 2028 ³. The takeaway is clear: don't wait for the bill to react. Adjust the AC today, file the rebate application, and watch your usage. In an expensive summer, every kilowatt counts.