Smart Home Upgrades That Save Money, and the Subscriptions That Cancel the Saving

Only the thermostat and the light switch have a real energy argument. Everything else on the shortlist costs money every year, and in March 2026 one of those annual costs rose 50 percent.

A smart home saves money in exactly two places: what the furnace does and what the lights draw. Everything else on the standard upgrade list is a convenience purchase with a renewal date attached to it. ecobee’s Smart Thermostat Premium sits at 229.99 dollars on ecobee’s own store as of 1 September 2026, marked down from a listed 259.99. Wyze’s annual camera plan went up 50 percent in March 2026. What follows is subtraction rather than a payback claim, because none of the pages cited here states one.

Key facts

• ecobee Smart Thermostat Premium: 229.99 dollars on ecobee.com on 1 September 2026, from a listed 259.99
• Launch MSRP in May 2022 was 249.99 dollars, so the list price has risen 10 dollars since
• ecobee’s free Core plan stores no video history at all
• Wyze Cam Plus annual went from 19.99 to 29.99 dollars per camera in March 2026
• Wyze’s four-camera bundle at 49.99 dollars a year became four single licences at 119.96

Nobody in this category publishes a savings figure

ecobee’s product page for the Smart Thermostat Premium gives a price, a discount and a shipping window. It does not give a number of dollars saved per year. Nor does the plans page that sells energy savings as a subscription benefit: the 5-dollar-a-month Plus tier lists enhanced energy savings among the things it adds, without quantifying any of them.

That is worth pausing on. The one device in this guide with a genuine physics argument behind it declines to say what it returns, while charging for the software that is meant to improve the return. So this guide will not assert a payback period. It will add up the outgoings instead, which every vendor here does publish, and set them against the hardware. Two of those running costs rose in the last twelve months.

ecobee has the energy argument and just moved a feature behind a second paywall

The Premium is ecobee’s flagship and is not superseded. It launched on 17 May 2022 at 249.99 dollars; ecobee’s own store now shows a list price of 259.99 with a sale price of 229.99. The list price went up while the sale price went down, which is a common enough retail shape but worth naming when a product is sold on the promise of saving you money.

The subscription is where the arithmetic turns. Tom’s Guide reported that ecobee removed 24 by 7 professional monitoring from its top Advanced plan and repriced it as a 10-dollar-a-month add-on, taking full protection from 10 dollars a month to 20. Smoke-alarm detection is a further 5 dollars a month. Buyers who already paid for the Advanced tier were paying for monitoring that has since been carved out of it.

What the free tier does keep, per ecobee’s own plans page, is motion and person detection, door and window open-close alerts, two-way talk, live view on the Premium and a manual siren. What it keeps of your video is nothing. Core stores no history.

An energy plug counts watts, it does not reduce them

TP-Link’s Kasa Plug Slim with Energy Monitoring, model EP25, does real-time and historical energy monitoring in the Kasa app. That is a measurement device sold as a savings device. Nothing in the plug lowers a bill; the reduction, if there is one, comes from a person reading a graph and then switching something off and leaving it off.

There is a second problem with recommending it in 2026. TP-Link’s own Kasa site lists a separate plug, the KP125M, which is Matter Certified and can be commissioned straight from the Alexa, Google Home or Apple Home app without the Kasa app at all. The EP25 makes no Matter claim. Buying the older one ties an appliance you plan to keep for a decade to one manufacturer’s cloud app.

The arithmetic for a three-device house, year one and year two

Take the most defensible shopping list anyone in this category could write: one thermostat with an energy case, and two cameras at the cheapest sensible price. Then run it forward.

1. Hardware in year one: one ecobee Smart Thermostat Premium at 229.99 dollars, plus two Wyze Cam v4 at 37.98 dollars each from Wyze’s own store on 1 September 2026. Total 305.95 dollars.
2. Subscriptions in year one: ecobee Plus at 50 dollars a year, plus Cam Plus annual at 29.99 dollars per camera. Total 109.98 dollars.
3. Year two buys no hardware and pays 109.98 dollars again. That is 36 percent of the original hardware bill, every year, with no end date.
4. Add ecobee’s professional monitoring and the thermostat’s own line goes to 20 dollars a month on Tom’s Guide’s figures, or 240 dollars a year on its own.
5. Five years of the base plans alone reach 549.90 dollars against 305.95 dollars of hardware, and that assumes no further increase after March 2026.

The four-pack we would not buy, and the near-identical one we would

The recommendation against, in this guide, is the Kasa EP25 four-pack. It is the one most shopping lists carry, it works, and it is the wrong version of the same product. TP-Link’s Kasa site describes the KP125M as Matter Certified and the EP25 as working with Alexa, Google Assistant or SmartThings devices, with no Matter claim in the feature text. For a plug that will outlive several phones, that difference is the whole decision.

There is a second reason to be wary, and it applies to both. TP-Link publishes no price on its own product pages and sends buyers to a retailer instead, which means the manufacturer will not tell you what its own hardware costs. That is a small thing on a plug and a habit worth noticing across a catalogue.

The date that matters most is 31 December 2026

Tom’s Guide reports that existing ecobee customers keep their current subscription plans only until 31 December 2026, after which they move to the new tier structure. That is four months away and it is the single most consequential number for anyone who already owns the hardware.

Wyze’s position is less clear and worse documented. The forum thread announcing the March 2026 changes records a subscriber whose four-camera arrangement went from 49.99 dollars a year to 119.96 and who cancelled, writing that a three-times increase is not how Wyze has always been. Wyze has not stated whether existing annual subscribers are repriced at renewal. Set a reminder for the renewal date rather than finding the new rate on a card statement.

Sources: ecobee · ecobee · Tom’s Guide · Wyze · Wyze Forums · Kasa Smart