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Electricity Bill Calculator – Tiered & Time-of-Use Rates

Calculate China residential electricity bills using tiered or time-of-use pricing. Select your province, enter monthly usage or peak/valley/flat hours, and instantly see a tier-by-tier cost breakdown plus total bill. Covers monthly and annual billing for individual and shared meters.

Overview

Most Chinese provinces use a tiered residential electricity pricing system where higher consumption incurs higher unit prices. Some areas also support time-of-use (peak-valley) pricing, rewarding off-peak usage with lower rates. This tool covers 17 major provinces plus a national default, supports both monthly and annual billing cycles, handles shared-meter households, and lets you manually override peak/flat/valley rates for maximum accuracy.

How to use

  1. Select a billing mode — Tiered Pricing or Time-of-Use Pricing.
  2. Choose your province; the tool auto-fills the official peak/valley reference rates.
  3. Tiered mode — pick billing cycle (monthly/yearly) and user type, then enter monthly usage. Shared-meter users also enter the number of households.
  4. Time-of-use mode — enter peak, valley and flat usage; adjust the unit prices if needed.
  5. Results update instantly showing per-tier or per-period breakdowns and an effective average rate.

Formula

Tiered (monthly): tier1 = min(Q, T1); tier2 = max(0, min(Q, T2) - T1); tier3 = max(0, Q - T2); total = tier1×P1 + tier2×(P1+ΔP2) + tier3×(P1+ΔP2+ΔP3). Yearly billing: annual usage = monthly×12, thresholds ×12. Shared meters: divide total usage by households to find per-household tier, then multiply cost by households. Time-of-use: total = peakUsage×peakRate + valleyUsage×valleyRate + flatUsage×flatRate; average rate = total ÷ totalUsage.

Common scenarios

Scenario 1 · Beijing single meter, 200 kWh/month, tiered monthly

Beijing Tier 1 cap is 240 kWh at ¥0.4883/kWh. All 200 kWh fall in Tier 1: bill ≈ ¥97.66, average rate ¥0.4883/kWh.

Scenario 2 · Shanghai single meter, 350 kWh/month, tiered monthly

Shanghai Tier 1 cap 260 kWh (¥0.617), Tier 2 up to 400 kWh (¥0.667). 260×0.617 + 90×0.667 ≈ ¥220.47, average rate ≈ ¥0.630/kWh.

Scenario 3 · Beijing time-of-use: peak 120 kWh + valley 60 kWh + flat 20 kWh

Beijing reference rates: peak ¥0.9583, valley ¥0.3193, flat ¥0.6388. Total ≈ ¥121.90; average ≈ ¥0.610/kWh. Shifting usage to off-peak hours can meaningfully reduce bills.

FAQ

How is the electricity bill calculated? How are the three tiers divided?

Tiered pricing splits monthly (or annual) usage into three bands. Usage above a band's threshold is charged at the next, higher rate. For example, in Beijing the first tier covers ≤240 kWh at the base rate; Tier 2 adds ¥0.05/kWh; Tier 3 adds ¥0.30/kWh. Thresholds and base rates vary by province.

Do tier thresholds differ by province? How is the surcharge applied to excess usage?

Yes, thresholds differ. Beijing's Tier 1 cap is 240 kWh/month, Shanghai 260 kWh, Guangdong 260 kWh, Sichuan 200 kWh. Only the usage exceeding a threshold is charged at the higher rate; lower tiers remain at their original price. The result panel shows per-tier usage and cost.

What is the difference between time-of-use and tiered pricing? Which is better?

Tiered pricing charges more per kWh as total monthly usage increases. Time-of-use pricing varies by time of day — off-peak hours (typically 22:00–08:00) are much cheaper. If you can shift major loads (laundry, EV charging, water heating) to off-peak hours, time-of-use is usually better. Otherwise, tiered pricing may cost less. Use both modes in this tool to compare your specific usage pattern.

What is a shared meter, and how are costs split among households?

A shared meter means multiple households share one meter, and the utility bills based on total consumption. Simply dividing the over-tier bill equally overstates each household's cost. The correct approach is to divide total usage by the number of households, compute per-household cost using the tiered formula, then multiply by the number of households. This tool's shared-meter mode implements that logic.

Why do electricity bills spike in summer and winter? Do seasonal peaks affect tier thresholds?

High-power appliances (air conditioners, heaters) push monthly usage into higher tiers in summer and winter, causing disproportionately larger bills. Some provinces apply seasonal adjustments to thresholds or surcharges in July–August and January–February. This tool uses year-round reference rates; check your local utility's seasonal announcements for precise figures.

Is tiered pricing billed monthly or annually? Is annual billing cheaper?

Most provinces default to monthly billing; some offer annual billing where the annual threshold is 12× the monthly threshold. For households with steady year-round usage, the totals are usually similar. But if usage swings heavily between seasons, annual billing pools usage over 12 months and may avoid tier surcharges, resulting in a lower total. Use this tool to compare both billing cycles for your pattern.

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