From the September 2569 (2026) bill, Thailand’s stepped home electricity rates changed, both at the Metropolitan Electricity Authority (MEA: Bangkok, Nonthaburi, Samut Prakan) and the Provincial Electricity Authority (PEA: everywhere else). Here is the price per unit, how a bill is worked out, and how much less you pay.
In short
- The new rates apply from the September 2569 bill; MEA and PEA use the same numbers.
- Most homes (rate 1.2): units 1–200 at 3.0000 baht, where the first 150 used to cost 3.2484.
- Ft for September–December 2569: 16.23 satang per unit.
- Work out your own bill with the electricity bill calculator, which also shows what it would have been at the old rates.
The new rates per unit
Prices exclude Ft and VAT.
Rate 1.2 (most homes, meter larger than 5 A), service charge 24.62 baht a month
| Units | New (baht/unit) | Old (baht/unit) |
|---|---|---|
| 1–150 | 3.0000 | 3.2484 |
| 151–200 | 3.0000 | 4.2218 |
| 201–400 | 4.1584 | 4.2218 |
| 401 and up | 4.3583 | 4.4217 |
Rate 1.1 (5 A meter), service charge 8.19 baht a month
| Units | New | Old |
|---|---|---|
| 1–15 | 2.3488 | 2.3488 |
| 16–25 | 2.9882 | 2.9882 |
| 26–35 | 3.0000 | 3.2405 |
| 36–100 | 3.0000 | 3.6237 |
| 101–150 | 3.0000 | 3.7171 |
| 151–200 | 3.0000 | 4.2218 |
| 201–400 | 4.1584 | 4.2218 |
| 401 and up | 4.3583 | 4.4217 |
We’ve lined up the bands so they compare easily; the numbers are from the MEA and PEA tables. Service charges haven’t changed.
Rate 1.1 or 1.2?
It’s on your bill. MEA explains:
- A meter of 5 A or less is rate 1.1. After 3 months in a row over 150 units it moves to 1.2, and back after 3 months in a row at 150 or less.
- A meter larger than 5 A is always rate 1.2.
- The monthly service charge is due even if you use no electricity.
PEA uses the same numbers but calls the rates 1.1.1 and 1.1.2.
How a bill is worked out
MEA splits the bill into three parts:
- Base charge = stepped energy charge + monthly service charge
- Ft = units × Ft rate
- VAT 7% = (base charge + Ft) × 7%
Example: a typical home using 300 units
- First 200 units × 3.0000 = 600.00 baht
- Next 100 units × 4.1584 = 415.84 baht
- Service charge 24.62 → base charge 1,040.46 baht
- Ft 300 × 0.1623 = 48.69 baht
- VAT 7% of 1,089.15 = 76.24 baht
- Total 1,165.39 baht
How much less than before
Our calculation from the official rates, with the same 16.23-satang Ft for both (it was also 16.23 for May–August 2569); totals include VAT.
| Units | Rate | New | Old | Saving |
|---|---|---|---|---|
| 100 | 1.1 | 336.55 | 382.50 | 45.95 |
| 150 | 1.2 | 533.89 | 573.76 | 39.87 |
| 300 | 1.2 | 1,165.39 | 1,277.41 | 112.02 |
| 500 | 1.2 | 2,111.41 | 2,237.00 | 125.59 |
The utilities don’t publish a rounding rule, so a real bill may differ by a few satang. Try your own units in the electricity bill calculator.
What Ft is, and what it is now
Ft is a variable per-unit charge that the Energy Regulatory Commission (ERC) reviews every 4 months.
- September–December 2569: 16.23 satang per unit, before VAT
- May–August 2569: 16.23 satang
- January–April 2569: 9.72 satang
According to MEA’s explanation, the Ft worked out for this period was much higher, but the ERC held it at 16.23 satang. The January–April 2570 Ft had not been announced on 30 September 2026; we’ll update the calculator when it is.
Who gets 50 free units
The new tables keep 50 free units, but only for rate 1.1 customers who aren’t companies, hold a state-welfare card, have registered for it with the utility and used no more than 50 units a month for at least 3 months in a row. Our calculator doesn’t deduct it.
Cutting the bill
Air conditioning is one of the biggest users of electricity in most homes. Pick the right size with the air-conditioner BTU calculator and read choosing air-conditioner BTU for your room.
Note
This article is based on MEA’s tariff tables and Ft explanation, PEA’s 2569 tariff structure and the ERC’s Ft statistics, read on 30 September 2026. The comparisons are calculated from those rates, not figures published by the utilities, and exclude TOU rates and government discounts.
