A Property Owner's Guide to Time of Use Hydro Rates
Your utility invoice lands on your desk, and the total is higher than last month. Occupancy hasn't changed much. The building didn't suddenly become larger. Tenants still expect a reasonable bill, and ownership still expects you to protect NOI. But with a bulk meter, you can't clearly show what caused the increase, who drove it, or how to allocate it fairly.
This is the fundamental issue with time of use hydro in multi-residential and commercial properties. The bill isn't just about how much electricity your building used. It's also about when that usage happened. If more consumption lands in expensive windows, your costs jump even when total usage looks relatively stable.
Property owners often respond the wrong way. They focus only on cutting usage, replacing fixtures, or asking residents to “be mindful.” Those steps can help, and broader energy-efficient home upgrades are worth reviewing when you're looking at envelope, HVAC, and appliance improvements. But upgrades alone don't solve the billing problem inside a bulk-metered building.
You need visibility. You need cost recovery. You need a defensible billing model that reduces disputes instead of creating them.
Table of Contents
- Introduction The Unseen Driver of Your Utility Bills
- What Are Time of Use Hydro Rates
- How TOU Pricing Varies Across North America
- The Multi-Family Challenge with Bulk Meters and TOU Rates
- The Solution Unit Submetering for Accuracy and Control
- Advanced Strategies to Optimize Building-Wide TOU Costs
- Conclusion Take Control of Your Energy Future
Introduction The Unseen Driver of Your Utility Bills
A lot of owners are dealing with the same pattern right now. The building runs normally, but hydro costs don't. One month looks manageable, the next month punches a hole in your operating budget, and your team spends hours trying to explain a bill that was never transparent in the first place.
That volatility usually isn't random. It's tied to when the property consumes power, not only how much power it consumes. Elevators, corridor lighting, laundry rooms, make-up air units, suite cooling, domestic hot water systems, and plug loads all stack up differently across the day. If too much of that demand lands in the wrong time window, your bulk bill rises fast.
For owners, the pain shows up in three places:
- NOI pressure: Utility costs eat into revenue you can't easily recover.
- Budget instability: Forecasting gets harder when timing matters as much as volume.
- Resident friction: Tenants question charges you can't fully defend at the unit level.
Bulk metering turns time-based pricing into an owner problem first and a tenant problem second.
That's why time of use hydro isn't just an electricity topic. It's an operating model issue. If your building still treats hydro as one blended expense, you're managing a modern pricing system with an outdated allocation method.
What Are Time of Use Hydro Rates
Time of use hydro is surge pricing for electricity. When the grid is under heavier demand, the price goes up. When demand is lower, the price drops. Utilities use that structure to push consumption away from the most strained periods.
Why utilities use this pricing model
The concept is simple. Electricity costs more at times when the system is under pressure. That pressure can come from workday demand, evening residential demand, weather, or generation patterns. Utilities don't want everyone using the most power at the same time, so they price those periods higher.
For a property owner, the practical takeaway is blunt. Your bill is shaped by scheduling, controls, and occupant behaviour. If your building pushes consumption into high-cost windows, you pay for it.
A quick video can help if you want a visual explanation of how the pricing logic works:
What the Ontario schedule looks like
Ontario gives a clear example of how this works in practice. Under the province's time-of-use model, the day is divided into off-peak, mid-peak, and on-peak periods. As of summer 2026, rates are 9.8 ¢/kWh for off-peak from 7 p.m. to 7 a.m., 15.7 ¢/kWh for mid-peak, and 20.3 ¢/kWh for on-peak from 11 a.m. to 5 p.m., according to Ontario time-of-use electricity pricing details.
Price gap that matters: In that Ontario summer 2026 schedule, on-peak power costs more than off-peak power, which means the same equipment load can produce very different bill outcomes depending on when it runs.
That sounds like a strong behavioural signal. In reality, price signals alone often don't move people enough. The same Ontario source notes that residential customers achieved only a 0.7% reduction in peak demand over four years, which tells you something important. If people don't have direct visibility, direct accountability, or practical ways to shift usage, TOU pricing doesn't perform as well as policymakers hope.
For owners, that matters because broad education campaigns won't carry the load. You need systems that connect consumption to responsibility. Otherwise, the price structure exists, but the building can't respond to it efficiently.
A simple way to think about the three periods:
TOU period
What it means for your building
Off-peak
Cheapest time to run deferrable loads
Mid-peak
Acceptable for some operations, but still worth monitoring
On-peak
Most expensive period. Avoid discretionary load here
If you remember one thing, remember this. Time of use hydro doesn't punish high usage alone. It punishes badly timed usage.
How TOU Pricing Varies Across North America
Owners with assets in more than one jurisdiction can't use one hydro playbook for every property. The TOU structure in Ontario is not the same as the one in California, and that difference changes how you manage equipment, tenant communication, and billing.
Ontario and California are solving different grid problems
Ontario uses a three-period structure that most owners recognise. California's residential TOU structure is centred on a different pain point. There, the peak pricing period is 4 p.m. to 9 p.m. every day, and that shift was made to reflect the duck curve, where solar generation drops in the late afternoon just as demand rises, according to PG&E's TOU transition overview.
That detail matters because it changes which building activities become expensive. In a California property, evening apartment living drives the problem harder. Cooking, cooling, lighting, entertainment, laundry, and plug loads all pile into the most expensive window. In Ontario, the stress pattern is different.
Here's the comparison in plain terms:
Region
Peak emphasis
Owner implication
Ontario
Structured daytime and shoulder pricing periods
Focus on managing workday and common-area timing
California
Late afternoon and evening peak
Focus on resident evening behaviour and automation
If your team treats TOU as a generic utility concept, you'll miss the actual cost exposures.
What that means for portfolio owners
The lesson isn't just about rate design. It's about operational discipline. A building in Ontario may benefit from one control strategy, while a building in California may need a completely different approach to HVAC scheduling, EV charging rules, or shared laundry timing.
That's also why distributed energy decisions have to match the local tariff. In markets where solar and export economics are part of the conversation, owners need to look beyond installation and think about tariff interaction, storage, and dispatch. If you're reviewing that side of the equation, this guide on how to maximize solar savings with VPPs is useful context for understanding how energy programs can affect the value of generated power.
A TOU rate is not just a price schedule. It's a set of incentives that should shape how a property runs.
For multi-family operators, the biggest mistake is assuming complexity is temporary. It isn't. North American grids are getting more dynamic, not less. Owners who build measurement and control into their operating model will be able to adapt. Owners who stay on bulk billing will keep explaining bills after the fact.
The Multi-Family Challenge with Bulk Meters and TOU Rates
Bulk metering and TOU pricing are a bad combination. One gives you a single bill for the whole building. The other makes the price highly sensitive to timing. Put those together, and the owner carries a cost structure that's difficult to allocate fairly and difficult to defend when challenged.
Bulk billing hides the real cost driver
When the utility bill arrives for a bulk-metered property, you can see the total. What you can't see is which units pushed usage into the expensive periods. That gap matters far more under TOU than under a flatter pricing model.
In jurisdictions like California, evening peak rates can be 2-3x higher than off-peak, and in bulk-billed multi-family buildings that volatility gets spread across everyone whether they caused it or not, as noted in SEIA's discussion of time-of-use pricing and fairness.
That creates a direct business problem:
- Owners absorb uncertainty: The building's utility profile can shift before you have any usable explanation.
- Conservative tenants subsidise heavy users: A resident who shifts usage away from peak still gets blended into the same building cost.
- Cost recovery gets messy: Allocation methods look arbitrary because they often are.
If you're still relying on a single meter and manual allocation logic, your billing process is working against you. Tools built for multifamily utility billing exist because bulk cost splitting is no longer good enough under modern tariffs.
Tenant disputes get harder to resolve
Residents don't experience “the building's hydro bill.” They experience their own routines. One tenant may be out during expensive hours. Another may run air conditioning, laundry, and kitchen loads during the highest-cost window. Under bulk recovery, both can end up paying for the same shared volatility.
You can't prove fairness with a bulk meter. You can only estimate fairness.
That distinction matters in leasing and retention. Tenants don't object only to cost. They object to charges that feel unconnected to their own behaviour. Once that trust slips, your team spends time on disputes, credits, explanations, and policy workarounds instead of operations.
From an ownership perspective, this isn't just an accounting nuisance. It's a structural weakness. A bulk-metered building under TOU pricing has poor cost visibility, weak behavioural incentives, and an avoidable source of resident dissatisfaction.
The Solution Unit Submetering for Accuracy and Control
Submetering fixes the core flaw in bulk billing. It measures usage where it happens, at the unit level, instead of forcing owners to reverse-engineer a building-wide bill after the fact.
Submetering changes the economics
Once each unit has its own meter, cost recovery becomes accurate instead of approximate. The owner no longer needs to absorb so much uncertainty into operating expenses, and the billing model starts matching actual consumption patterns.
That gives you several immediate advantages:
- Cleaner recovery: Residents pay for their own usage instead of a blended estimate.
- Better forecasting: Owners can separate suite consumption from common-area loads.
- NOI protection: Hydro stops acting like a vague expense bucket and becomes a manageable line item.
For properties evaluating implementation, the right question isn't “Do we want more meters?” The right question is “Do we want a billing system that aligns price signals with the people creating the cost?” If the answer is yes, then electricity submetering solutions deserve serious review.
It also changes tenant behaviour
Submetering does something bulk billing never can. It makes the TOU signal real for the resident. When people can see that their own timing affects their own bill, they have a reason to change habits. Some will shift laundry. Some will change thermostat schedules. Some won't. That's fine. The point is that each resident becomes responsible for their own pattern.
Here's the operational difference:
Billing model
Resident sees
Owner gets
Bulk allocation
A shared charge that may feel arbitrary
Complaints, write-offs, weak cost control
Unit submetering
A bill tied to actual personal use
Better recovery, better transparency, less friction
Practical rule: If a cost depends on individual behaviour, measure it individually.
Submetering also improves management decisions. Owners can isolate common-area consumption, identify avoidable operational waste, and stop confusing tenant-driven usage with base building demand. That separation is essential if you want to optimise TOU costs rather than just react to them.
Advanced Strategies to Optimize Building-Wide TOU Costs
Submetering is the foundation, not the finish line. Once you can see where electricity is going and when it's being used, you can start reducing TOU exposure in a deliberate way.
Shift common area loads with intention
Property managers usually have more control over common-area loads than they think. The issue is that many buildings run equipment based on habit, not tariff logic.
Start with the loads you can schedule or stage:
- Water heating: If the system allows storage or staged recovery, move as much as possible away from expensive windows.
- EV charging: Set overnight rules where the tariff rewards it.
- Ventilation and make-up air: Review whether full operation is needed at the same intensity across all time periods.
- Shared laundry or amenity equipment: Where policy permits, encourage lower-cost operating windows.
- Lighting and controls: Make sure timers, occupancy sensors, and schedules reflect actual usage patterns.
Revenue-grade submeters are key in this regard. Without reliable measurement, you're guessing at load profiles. With revenue-grade submeters, you can separate assumptions from facts and tune operations with confidence.
Use TOU data to choose the right rate plan
Ontario's optional Ultra-Low Overnight plan is a strong example of why tariff selection matters. Introduced in 2023, it offers 2.4 cents/kWh from 11 p.m. to 7 a.m., which is 67% lower than the standard off-peak rate, according to the Ontario government's Ultra-Low Overnight announcement.
That creates a real incentive for properties that can move energy-intensive operations into overnight hours. Water heating, EV charging, and some common-area loads may fit. Other buildings won't be good candidates because they can't shift enough demand, or because their peak exposure would become too costly under the alternative schedule.
The right approach is disciplined:
- Map the building's load shape. Identify when major loads run.
- Separate suite and common-area demand. Don't make tariff decisions based on blended data.
- Test shiftable loads first. Look for operational changes that don't affect resident comfort.
- Review the tariff impact before switching. A lower overnight rate only helps if the building can use it well.
- Educate residents where appropriate. If tenants understand the cost windows, some will adapt.
Buildings don't optimise TOU costs by trying harder. They optimise them by measuring, scheduling, and enforcing the right operating rules.
Owners who do this well treat TOU hydro as part of asset management. They don't leave it as a passive utility expense.
Conclusion Take Control of Your Energy Future
Time of use hydro can look like a utility problem, but for property owners it's really a control problem. If your building is bulk-metered, you're paying a time-sensitive bill without the data needed to assign responsibility, manage behaviour, or protect NOI properly.
That's why generic conservation advice isn't enough. You can install efficient equipment and still struggle with hydro costs if the pricing model punishes when the building uses power and your billing system can't reflect that reality. The missing piece is measurement.
Unit submetering gives owners something they rarely have with bulk billing. Clarity. You can recover costs more accurately, separate common-area demand from tenant usage, reduce disputes, and make smarter decisions about rate plans and load shifting. Tenants get transparency. Managers get cleaner data. Ownership gets a more defensible operating model.
The broader lesson is simple. Modern utility pricing requires modern utility management. Owners who keep using blunt allocation methods will keep dealing with avoidable volatility and resident friction. Owners who move to precise measurement can turn a messy expense category into a managed system.
You don't need to eliminate TOU complexity. You need to stop letting that complexity control your building.
If you want a practical path to better cost recovery, clearer resident billing, and stronger utility control, Axis Meter Solutions can help you evaluate a submetering strategy that fits your property type, jurisdiction, and operating goals.
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