A reliable utilities budget starts with the actual meter, tariff and service contract for your home. “Electricity is cheap” and “Wi-Fi is included” are too vague to support a housing decision. You need to know who bills you, what consumption is included, how extra use is calculated and which costs continue while you are away.
This guide was reviewed on 1 November 2026. It explains electricity, water and connectivity, with dated official data and transparent calculations. Examples are not quotations for your apartment. Service areas, meter categories, promotions and rental arrangements differ; use a recent bill and a written provider or landlord explanation to finish your own budget.
Identify the accounts before estimating costs
Ask whether electricity and water are billed directly by the utility, passed through by an individual owner, or allocated through a building's master meter. Obtain the account or meter reference and ask who receives the bill. The name on the lease and the name on a utility account may differ; establish who is responsible for paying and resolving an error.
For electricity, MEA serves the metropolitan service area and PEA covers its provincial service areas. For water, identify the actual supplier rather than applying a Bangkok water table to every province. A building's shared supply or an inclusive serviced room can also differ from an individually metered residential account.
At handover, photograph each meter and record the date with the landlord. Check the opening reading against the first bill. Ask about any unpaid balance before your tenancy and make responsibility clear in writing. Keep utility deposits, installation costs and the first month's consumption on separate lines so that an initial payment is not mistaken for a normal monthly bill.
Read an electricity bill in the right order
The first number to understand is consumption in kilowatt-hours, usually shown as units. One kilowatt-hour means one kilowatt used for one hour. A bill normally combines the applicable base tariff, a fuel-adjustment component called Ft, a service charge and tax, with any other adjustments shown separately. The total cannot reliably be reconstructed from one headline unit price.
| Bill component | What it represents | What to check |
|---|---|---|
| Consumption | Current reading minus previous reading, subject to the meter's billing basis | Correct meter and period |
| Base charge | Energy charged under the account's tariff | Residential category, blocks or time-of-use terms |
| Ft | Adjustment applied per unit for the relevant period | Effective billing months and baht versus satang |
| Service and tax | Additional bill components | Actual account charge and applicable tax |
| Other items | Arrears, credits or adjustments | Whether they belong to your usage period |
Read tariff dates as well as numbers. A base-tariff document and an Ft announcement describe different parts of the bill. A news report about an average electricity price is not necessarily the rate for every unit on your account. Ask the utility to explain your tariff code if you cannot reconcile it with the published schedule.
Use the current Ft without confusing the units
The Energy Regulatory Commission's retail Ft table lists September–December 2026 at 16.23 satang per unit. PEA's current Ft page expresses the same figure as THB 0.1623 per unit. That decimal conversion matters: 16.23 baht would be one hundred times larger.
At that adjustment, 300 units contribute 300 × 0.1623 = THB 48.69 in Ft before any applicable tax treatment. At 500 units the corresponding amount is THB 81.15. These figures are the Ft component only, not the complete electricity bill. They do not include the base energy charge, account service charge or tax.
For a future billing period, replace the Ft with the announced figure for that period. Do not assume the September–December value continues indefinitely. If a bill spans a change or shows an adjustment, request the provider's explanation rather than forcing the total to match a single simplified calculation. Keep the bill alongside the tariff information used for your estimate.
Understand tiered electricity with a worked example
PEA's published base-tariff schedule includes a residential over-150-unit structure with THB 3.2484 for the first 150 units, THB 4.2218 for units 151–400 and THB 4.4217 above 400. The document is dated November 2018; verify the current tariff and service charge applicable to your account before treating this worked structure as your bill.
Under those stated base-energy assumptions, 300 units cost 150 × 3.2484 + 150 × 4.2218 = THB 1,120.53 in base energy. Adding the September–December 2026 Ft of THB 48.69 gives THB 1,169.22 before the account's service charge, tax and other adjustments. It is deliberately not labelled a final invoice.
At 500 units, the same assumed structure gives THB 1,984.88 in base energy: the first 150 units, the next 250 and the final 100 are calculated separately. Adding THB 81.15 Ft gives THB 2,066.03 before those remaining bill components. Multiplying every unit by only the highest block would produce a different and misleading estimate.
Your account may use another residential category, a time-of-use arrangement or building billing. Start with the actual tariff code and a recent itemised bill. The purpose of the calculation is to make the components understandable, not to promise that a 300-unit apartment anywhere in Thailand receives the same final charge.
Estimate consumption from how you live
List the equipment that runs for long periods: air-conditioners, refrigerator, water heater, cooking appliances, computer equipment and any specialist devices. Use the appliance label or a suitable measured reading where possible. Rated maximum power is not necessarily continuous consumption, particularly for equipment that cycles or adjusts its output.
For an illustrative device averaging 0.8 kilowatts for eight hours daily over thirty days, consumption is 0.8 × 8 × 30 = 192 units. This is a chosen arithmetic example, not a claim that every air-conditioner draws 0.8 kilowatts. Room size, temperature setting, sun, insulation, equipment efficiency and use all affect the real result.
Compare similar periods after you move in. A home occupied all day, a visiting family member or an unusually hot month can change consumption without a tariff error. Keep a simple note of days away and major changes. If consumption rises unexpectedly, inspect the readings and equipment with the landlord or provider rather than assuming the increase proves overcharging.
Reduce avoidable use by maintaining equipment, closing the conditioned space and turning off unnecessary loads. Report damaged wiring, overheating plugs or persistent leaks to the responsible professional. Do not open meters, improvise electrical repairs or block ventilation to save money. Any improvement should preserve safe operation and a comfortable home.
Calculate water using the correct supplier
Water meters commonly measure cubic metres: one cubic metre is 1,000 litres. Check the billing period and whether the account serves your unit or a larger property. A per-person assumption cannot explain a shared meter unless the allocation method is stated. Ask about common-area consumption and how a suspected leak is handled.
MWA's 2024 annual report tariff table lists residential water at THB 8.50 per cubic metre for the first 30, with separate raw-water and meter service charges and VAT excluded from the tariff table. The half-inch meter's monthly service charge is listed as THB 25. This is MWA-specific published information, not a nationwide water quote.
Using 20 cubic metres as an example gives THB 170 in water consumption at that first-block rate. A THB 0.15 raw-water charge per cubic metre adds THB 3; a THB 25 service charge would bring that illustrative subtotal to THB 198 before applicable tax and other items. Confirm the current meter, rate and bill components rather than copying the example directly.
A toilet that keeps filling or a concealed leak can affect consumption even when you do not see running water. Record unusual readings and report them promptly. If you leave the home empty, ask the landlord about an appropriate leak-check arrangement and access procedure rather than shutting shared systems or altering plumbing yourself.
Check landlord utility charges and inclusions
Before signing, obtain the unit rate or allocation formula, billing dates, any included allowance and the treatment of excess consumption. Ask for an example bill. A statement that utilities are “at government rate” still needs a clear calculation and the relevant supplier's charges. An inclusive package should identify what is included and whether unused allowances carry forward.
For residential-rental businesses within the current controlled-contract rules, OCPB's 2026 guidance says electricity and water must not be charged above the provider's actual charges. Applicability depends on the accommodation and operator: OCPB's coverage explanation describes businesses with three or more units and relevant hotel and dormitory exclusions. Do not assume every private lease has identical treatment.
If the calculation appears wrong, request the readings, period, underlying rate and itemised explanation in writing. Keep the lease and original bills. Compare like with like: a subtotal excluding tax and service is not automatically comparable with a final payable amount. For unresolved covered-consumer issues, use OCPB's official complaint channels and obtain advice on your specific agreement.
Do not withhold rent or alter a meter as an improvised response to a disagreement. Document the discrepancy and use the appropriate provider, landlord or consumer process. A clear record of the amount disputed and why is more effective than a general accusation that all building bills are inflated.
Price home internet beyond the promotion
Ask whether the home has a private fibre line, shared building Wi-Fi or only mobile coverage. Check serviceability for the exact address and unit. A provider advertising coverage in a district does not establish that a particular building has an available connection or permits installation.
An AIS-hosted retail page advertises a Super MESH Plus II example at THB 599 monthly before VAT, THB 640.93 including VAT, for 500/500 Mbps on a 24-month contract. This is a named advertised offer checked for this review, not a recommendation or assurance of eligibility, installation or availability at your address.
Compare the price after promotions end, minimum term, installation, equipment ownership, router return, moving-home rules and early-termination terms. A twelve-month tenancy and a twenty-four-month connectivity agreement deserve careful thought. Ask how a move to an unserviceable address is handled and obtain the answer in the provider's terms rather than relying on a verbal assurance.
For work, test upload performance, video calls and reliability in the actual room. The advertised line speed and the Wi-Fi speed at a distant desk are different measurements. Establish whether you can use a wired connection and whether a mobile backup would serve essential work during an outage.
Include mobile service and small recurring charges
Price the mobile plan you need for data, calls, tethering and coverage where you live. Separate a temporary travel package from a sustainable resident arrangement. Check renewal, validity, out-of-bundle charging and any automatic add-ons. A low introductory price is less useful if the plan renews on different terms or your balance expires unexpectedly.
Keep your registered phone number available if it supports banking or important account recovery. Changing SIMs, losing a device or failing to maintain validity can create problems beyond the price of the mobile plan. Follow the provider's identity and replacement process and keep recovery arrangements current.
Add other household services only when they genuinely apply: drinking-water delivery, cooking fuel, rubbish collection, laundry or shared-service charges. Record which are already included in rent. Avoid paying for the same service through both a building package and a separate subscription unless you deliberately need both.
Review subscriptions after the first month. Streaming bundles, extra data and optional equipment can continue after their initial usefulness has passed. Check cancellation conditions and retain confirmations. Keep provider account references securely; do not share identification documents or one-time codes with unsolicited callers offering a bill discount.
Build a household budget and a move-out plan
Use three columns: regular monthly spending, one-off setup and refundable amounts. For a purely hypothetical household, THB 1,800 electricity + THB 250 water + THB 640.93 internet + THB 600 mobile equals THB 3,290.93 monthly. Only the named internet advertisement above is a sourced offer; the other inputs are chosen assumptions. Replace all of them with your actual home and plans.
Keep a higher-use scenario beside the normal month. Add expected visitors, more days working from home or seasonal cooling without presenting the result as a national average. A reserve is particularly useful when bills arrive after a rental period or an adjustment appears later.
When moving, agree the final readings, billing cutoff, account transfers, cancellation dates and equipment returns. Ask how the final bill and any refund will be handled after you leave. Take photographs and keep receipts for returned routers or other provider equipment. A working connection on departure day does not prove the account has been closed.
If utilities are managed by the landlord, include the final settlement in the handover record. If you hold a direct provider contract, contact that provider separately. Confirm that automatic payment arrangements match the final account status and retain access to the email or phone number needed to receive the last invoice.
For a shared household, agree how residents split each bill and how absences affect the arrangement. Keep the original invoice available to everyone paying a share, with private account details protected.
Frequently asked utility questions
Is Ft the whole electricity unit price?
No. It is an adjustment component. The base tariff, account service charge, tax and any other adjustments still matter. Check the effective period and whether a figure is stated in satang or baht.
Can I predict my bill from the previous tenant's spending?
Use it as context, with permission and personal details removed. Compare occupancy, cooling habits, days at home and appliances. Your own meter readings and first full billing periods will provide a better basis.
Does included Wi-Fi mean I can work reliably?
Not necessarily. Test the actual room, peak-time performance and upload requirements, and ask about support and backup. A shared connection can meet casual needs while being unsuitable for essential work.
Why is a refundable deposit separate from my monthly budget?
It requires cash but may be recoverable subject to the contract. Record when it is paid, who holds it, what can be deducted and how it is returned. Do not count it as both recurring spending and a separate setup expense.
Sources, review and your next bill
Content owner: Thailand Navigator. Reviewed: 1 November 2026. This AI-assisted editorial review uses official utility, regulator, consumer-protection and provider sources. No inspection, meter test or household quote is claimed. Historical tariff documents and current adjustment periods are identified separately.
Consult ERC's Ft history, PEA's current Ft, PEA's tariff service, the MWA tariff table, OCPB utility guidance and the linked AIS-hosted offer for the specific facts discussed.
Obtain one recent itemised bill for each utility, photograph the opening readings and ask for a written explanation of any building allocation. Add the confirmed monthly total to rent, food and transport to complete your household plan.