If you have looked closely at your TANGEDCO (TNEB) electricity bill, you have probably seen a short code like LA1A, LA2A or LA3 printed near your service details. This is your tariff category — it tells TNEB which rate slab to charge you. Here is what those codes actually mean.
TNEB groups consumers by the type and voltage of their connection. LT (Low Tension) covers homes and small establishments; HT (High Tension) covers large industrial/commercial consumers. The "LA" family is the Low-Tension domestic group — ordinary household connections used for lights, fans and appliances.
| Code | Applies to |
|---|---|
| LA1A | Domestic (home) connection — the standard household supply most TN residents have. |
| LA2A | Domestic connection in a different consumption/subsidy band. |
| LA3 / LA4 | Other low-tension domestic sub-categories (e.g. certain hut/subsidised or higher-usage households). |
The exact band your code maps to depends on your monthly units and the current TNERC tariff order. The code itself does not change your bill — your units consumed and the applicable slab rate do.
Whatever your tariff code, TNEB charges on a slab basis: the first units are cheaper (or free, under the domestic subsidy), and higher usage is charged at higher per-unit rates. To see the current slabs and estimate your bill:
Is LA1A good or bad? Neither — it is simply the standard domestic category. It is what most TN households are on.
Can my tariff code change? Yes, if your connection type or usage classification changes (for example, converting a domestic connection to commercial). You cannot change it just to pay less.