How much is one unit of home electricity in Thailand (2026)?

There is no single price — homes pay progressive tiers from 2.3488 to 4.4217 THB/unit (base rate), plus the Ft of 0.1623 THB/unit (May–Aug 2026), a monthly service charge and 7% VAT. Medium-to-heavy homes effectively pay about 4.2–4.5 THB/unit — enter your own units above to see your exact figure.

What's the difference between Type 1.1 and 1.2, and which am I?

Type 1.1 is a home using ≤150 units/month (7 sub-tiers from 2.3488 THB/unit, service charge 8.19 THB); Type 1.2 uses >150 units/month (3 tiers from 3.2484 THB/unit, service charge 24.62 THB). The utility switches you automatically after 3 consecutive months — this tool picks the type from the units you enter.

Why is my real bill higher than units × the average rate I hear quoted?

Because the quoted average (e.g. 3.95 THB/unit) is a system-wide average, not your rate. Homes over 150 units are billed up to 4.4217 THB/unit in the top tier, then Ft, the service charge and 7% VAT stack on top. This tool's breakdown table shows exactly which tier every baht comes from.

When does the "first 200 units ≤3.00 THB" measure start, and does this tool support it?

The NEPC measure applies automatically from August 2026 usage, billed in the September 2026 cycle — no registration. Earlier bills use the normal rates. This tool has an opt-in "policy mode" toggle to preview the estimate (the default stays on today's normal rates).

Free tool for every home

Calculate Your Thai Electricity Bill

Enter your monthly units from the meter or bill and see it computed on the official MEA/PEA progressive tiers, step by step — or enter a bill amount to estimate units in reverse.

As of May–Aug 2026

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A Thai home bill has 4 parts: a progressive energy charge (from 2.3488 up to 4.4217 THB/unit — the more you use, the pricier your top units), plus the Ft of 0.1623 THB/unit (May–Aug 2026), plus a monthly service charge, then 7% VAT on the whole subtotal. This tool computes all four parts on the latest official rates.

Calculate your bill

Official MEA/PEA residential rates (Type 1.1 / 1.2)

Units used per month

units

From your bill, or this month's meter reading minus last month's.

Type is selected automatically: ≤150 units = Type 1.1 (service charge 8.19 THB); >150 units = Type 1.2 (service charge 24.62 THB).

Policy mode: first 200 units capped at 3.00 THB/unitNEPC measure effective with the Sep 2026 bill cycle (Aug usage) — not in force for earlier bills. Figures in this mode are a preliminary estimate. Read the full measure brief

How a Thai Home Bill Is Computed (Official Formula)

1) Tiered energy charge — sum each tier's units × that tier's rate (Type 1.1 starts at 2.3488 THB/unit; Type 1.2 starts at 3.2484, climbing to 4.4217 THB/unit).
2) Ft charge — total units × 0.1623 THB/unit (May–Aug 2026), adjusted every 4 months by the ERC.
3) Monthly service charge — 8.19 THB (Type 1.1) or 24.62 THB (Type 1.2), a flat monthly fee.
4) 7% VAT — applied to the whole subtotal (energy + Ft + service charge).

In short: total bill = (tiered energy + Ft × units + service charge) × 1.07.

Worked Example: a 300-Unit Month

Every figure below is computed live from the same rate tables as the calculator (over 150 units, so Type 1.2):

Step-by-step breakdown (MEA/PEA base tiers + Ft + service + VAT)
Item	Calculation	THB
Tier units 1–150	150 × 3.2484	487.26
Tier units 151–300	150 × 4.2218	633.27
Energy subtotal		1,120.53
Ft charge	300 × 0.1623	48.69
Service charge (1.2)	flat	24.62
Subtotal before VAT		1,193.84
VAT 7%	1,193.84 × 0.07	83.57
TOTAL		1,277.41