💡 Which Hydro Confusion Brought You Here?
Bill Seems HighDelivery charges often match or exceed electricity charges — even with low usage. Understanding why helps you decide what's actually reducible.
Mystery Line Items"Global Adjustment," "Regulatory Charges," "Loss Factor" — none of these are on the electricity you used. This guide explains each one.
New to OntarioHydro bills in Ontario are significantly more complex than utility bills in many other countries. This breakdown is your starting point.
Trying to SaveBefore you can cut your bill, you need to know which charges are fixed and which actually respond to your behaviour. They're not the same.
$120–150
Avg monthly Ontario
residential bill (2026)
residential bill (2026)
9.8¢
Off-peak rate
(Nov 2025 – Oct 2026)
(Nov 2025 – Oct 2026)
23.5%
Ontario Electricity Rebate
(as of Nov 1, 2025)
(as of Nov 1, 2025)
13%
HST on your
hydro bill
hydro bill
If you've ever stared at your Ontario hydro bill wondering why it's so high when you barely used any electricity — you're not alone. Ontario's electricity bills are among the most complex in North America. The amount you pay for the electricity you actually consumed is often just a fraction of the total. Delivery charges, regulatory fees, the Global Adjustment, HST, and rebates all stack up before you even see a final number. Here's a plain-English breakdown of every single line item, so you can finally understand where your money goes.
🧾 Your Bill Line by Line
1. Electricity Charge (Energy Charge)VARIABLE
This is the actual cost of the electricity you consumed, measured in kilowatt-hours (kWh). Your rate depends on your pricing plan — Time-of-Use (TOU), Tiered, or Ultra-Low Overnight (ULO). This is the only charge directly controlled by your usage behaviour. For the average Ontario household using 700–1,000 kWh/month, this is typically $50–$80 before all other charges.
2. Delivery ChargePARTLY FIXED
This pays for the infrastructure that gets electricity from generators to your home — transformers, power lines, substations, poles, and the utility's operations. It has two parts: a fixed monthly customer charge (you pay it regardless of usage) and a variable distribution charge (based on your kWh). For many Ontario households, the delivery charge equals or exceeds the electricity charge. Approved annually by the Ontario Energy Board (OEB). Toronto Hydro increased delivery charges effective January 1, 2026.
3. Regulatory ChargeSMALL / FIXED FORMULA
A collection of small charges covering: the cost of running Ontario's electricity market (IESO), system reliability programs, and government oversight by the OEB. Typically a few dollars on a residential bill. Appears as one or two line items. Not negotiable or reducible through behaviour changes.
4. Global Adjustment (GA)EMBEDDED IN RESIDENTIAL RATES
The most misunderstood charge in Ontario. The Global Adjustment covers the difference between the market price of electricity and the higher regulated rates Ontario pays to generators (nuclear, renewables, gas) through long-term contracts, plus the cost of conservation programs. For residential customers on RPP (Regulated Price Plan), the GA is already baked into your electricity rate — it doesn't appear as a separate line. For large commercial customers, it appears separately and can be enormous. In 2026, nuclear refurbishment costs are pushing GA higher, contributing to projected 20–30% bill increases for some households.
5. Ontario Electricity Rebate (OER)CREDIT — SAVES YOU MONEY
A government credit applied automatically to eligible residential and small business bills before HST is calculated. As of November 1, 2025, the OER increased from 13.1% to 23.5%. It applies to your electricity charges, delivery charges, and regulatory charges combined. You don't apply for it — it's automatic if you're a residential or small business customer using under 250,000 kWh/year. This credit offsets a significant portion of the bill.
6. HST (13%)TAX
Harmonized Sales Tax applies to electricity in Ontario at 13%. It's calculated on the subtotal after the Ontario Electricity Rebate is applied. So if the OER reduces your bill from $100 to $76.50, HST is calculated on $76.50 — not on $100. Many bill-payers don't realize HST applies to electricity, but it does, and it adds noticeably to higher bills.
⏰ The Three Pricing Plans: Which Are You On?
Time-of-Use (TOU) Rates — Nov 2025 to Oct 2026
Off-Peak
Mid-Peak
On-Peak
ULO (overnight)
Source: OEB, Solar-X Canada (2026). ULO on-peak peaks at 39.1¢/kWh — the highest rate in Ontario.
| Plan | How It Works | Summer On-Peak Hours | Best For |
|---|---|---|---|
| Time-of-Use (TOU) | 3 rates by time of day — off/mid/on-peak | Weekdays 11am–5pm (eff. May 1, 2026) | Flexible households who can shift usage |
| Tiered | Flat rate for first 1,000 kWh; higher after | No time restriction | Consistent, predictable usage — less time-sensitive |
| Ultra-Low Overnight (ULO) | 4 tiers including a very low overnight rate (3.9¢) | Highest rate: 39.1¢/kWh on-peak | EV owners, night-shift households, or those who can do all major tasks overnight |
2026 Summer TOU Change (May 1)
Effective May 1, 2026, the OEB's seasonal switch moved on-peak hours from mornings + evenings to 11am–5pm on weekdays. This is a schedule change only — not a rate change. The 9.8¢ / 15.7¢ / 20.3¢ rates were set November 1, 2025 and run through October 2026. If you run your dishwasher, laundry, or AC during the midday in summer, you're now squarely in on-peak territory.💰 Why Is My Bill So High Even When I Don't Use Much?
This is the most common question. The answer: a large portion of your hydro bill is fixed or semi-fixed — it doesn't shrink much even if you cut your electricity usage in half. Here's the breakdown for a typical bill:
| Bill Component | Typical % of Bill | Can You Reduce It? |
|---|---|---|
| Electricity (energy) charges | ~30–40% | ✅ Yes — shift usage to off-peak |
| Delivery charges | ~35–45% | ⚠️ Partially — fixed customer charge always applies |
| Regulatory charges | ~3–5% | ❌ No — formula-based |
| Ontario Electricity Rebate | −23.5% credit | ✅ Applied automatically |
| HST | ~13% of post-OER total | ❌ No — applies automatically |
✅ 6 Things You Can Do Right Now to Lower Your Bill
- Switch to TOU and run appliances at night or weekends.On TOU, off-peak (9.8¢) is half the price of on-peak (20.3¢). Running your dishwasher, washer/dryer, and EV charging overnight or on weekends saves the most with zero effort.
- Consider Ultra-Low Overnight (ULO) if you have an EV.At 3.9¢/kWh overnight, ULO is extraordinary value for EV charging. The trade-off is a very high on-peak rate (39.1¢/kWh) — only works if you can commit to minimal midday usage.
- Pre-cool your home before 11am in summer.On TOU summer rates, on-peak starts at 11am. Running your AC hard before 11am and raising the thermostat during peak hours cuts your electricity cost significantly on hot days.
- Check your pricing plan.Log into your utility's portal (Hydro One, Toronto Hydro, Hydro Ottawa) and compare your actual usage pattern against what you'd pay on TOU vs Tiered. The OEB provides a free comparison tool at ontario.ca/electricity.
- Review your delivery charge after recent OEB approvals.Toronto Hydro and several other utilities increased delivery charges in January 2026. If your bill jumped in January, this is likely why — not your usage.
- Sign up for budget billing.Most utilities offer equal monthly billing — they average your annual usage and charge the same amount every month, ending the shock of high winter bills. Reconciled once per year.
📌 Your OEB rights: If you believe your meter is inaccurate, you can request a meter test through your utility. If you're in arrears, you have the right to a payment arrangement. The OEB's Energy Assistance Program (OESP) provides a monthly on-bill credit for eligible low-income households — apply at ontario.ca/electricity-assistance.
⚡ Ontario Hydro Bill: Quick Reference
Off-Peak Rate
9.8¢/kWh
nights + weekends
nights + weekends
Summer On-Peak
11am–5pm weekdays
20.3¢/kWh
20.3¢/kWh
OER Rebate
23.5% credit
automatic
automatic
Delivery
~35–45% of bill
partly fixed
partly fixed
Global Adjustment
Embedded in rates
(residential)
(residential)
HST
13% on subtotal
after OER
after OER
Best for EVs
ULO plan
3.9¢ overnight
3.9¢ overnight
Avg Monthly Bill
$120–$150
(post-OER, 2026)
(post-OER, 2026)
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