Hot Water Rebates QLD 2026

Small-scale Technology Certificates (STCs) are the primary financial incentive for upgrading to an energy-efficient hot water system in Australia. Created under the federal Renewable Energy Target (RET) scheme, STCs function as a tradeable commodity — each certificate represents one megawatt-hour of renewable energy that your new system is deemed to produce over its lifetime. When you install an eligible heat pump or solar hot water system, the system generates a set number of STCs based on its efficiency, your climate zone, and the remaining years in the deeming period (which runs until 2030).

The Gold Coast falls within Zone 3 under the Clean Energy Regulator's postcode mapping, which carries a multiplier of 1.000. This means you receive the base STC allocation without any reduction. The current STC spot price sits around $39.90 per certificate, near the market price cap of $40. This price has remained stable throughout 2025 and into 2026, meaning you can confidently estimate your rebate value.

The key advantage of STCs is that they work as an instant point-of-sale discount. You never need to purchase certificates, trade them, or wait for reimbursement. Instead, you assign your right to create STCs to your installer at the time of purchase, and they reduce your invoice by the equivalent value. This means you pay less upfront with zero paperwork on your end — your installer handles the entire STC creation and trading process.

The number of STCs your new system generates depends on the system type, its efficiency rating, and the remaining deeming period. As of 2026, here are the typical STC values for Gold Coast installations.

Heat pump hot water systems generate approximately 25 STCs, which translates to a rebate of $950 to $1,050 depending on the exact spot price at the time of installation. Heat pumps are the most popular choice for Gold Coast homeowners due to their compact footprint and strong rebate value relative to their lower purchase price.

Solar hot water systems with electric boost generate approximately 28 STCs, worth $1,050 to $1,150. Solar systems with gas boost generate approximately 30 STCs, worth $1,150 to $1,200 — the highest STC allocation of any hot water system type. The higher certificate count for solar reflects the greater renewable energy contribution these systems are deemed to produce.

It is important to understand that the deeming period ends in 2030. Each year that passes reduces the number of STCs generated because there are fewer years of deemed energy production remaining. This means the rebate value decreases annually. A system installed in 2026 will generate more STCs than the identical system installed in 2027. If you are considering an upgrade, acting sooner locks in a higher rebate.

Eligibility for STC rebates is broad and straightforward. The key requirement is the system itself, not the property owner. Your new hot water system must be an eligible heat pump or solar hot water unit listed on the Clean Energy Regulator's approved product list. Most major brands — including Reclaim, Sanden, iStore, Rheem, Rinnai, Dux, and Chromagen — have models on the approved list.

You can replace any existing hot water system to qualify. Whether you are upgrading from an old electric storage tank, a gas system, or even replacing an existing heat pump or solar unit, the STC rebate applies. There is no restriction on the type of system being replaced — only the new system must meet the eligibility criteria.

All property types qualify. Owner-occupied homes, rental properties, and commercial premises are all eligible. There are no income restrictions, no means testing, and no caps on the number of properties you can claim for. If you own multiple investment properties, each can receive the STC discount when upgrading.

The one firm requirement is installation by a licensed plumber. DIY installations do not qualify for STCs. The installation must be performed by a licensed plumbing professional, and the installer must be registered as an STC agent or work with a registered agent to create the certificates. All of our installations meet these requirements automatically.

Queensland has historically offered state-level incentives on top of federal STCs, though the landscape has shifted in recent years. The QLD Climate Smart Energy Savings Program, which provided additional rebates for residential hot water upgrades, closed in January 2024 after assisting 72,700 Queensland households. This was a highly successful program but is no longer accepting applications.

For businesses, the Queensland Business Energy Saving and Transformation (QBEST) program remains active and is a significant opportunity. QBEST provides grants of $1,000 to $12,500 for eligible energy efficiency upgrades, which can include commercial hot water system replacements. The program targets small-to-medium businesses and can be combined with STC rebates, meaning a business could potentially receive both the federal STC discount and a QBEST grant on the same installation.

While there is no current residential state program to replace Climate Smart, the federal STC scheme remains the most substantial and reliable incentive. We monitor all state and local government programs and will update this guide if new residential programs are announced. In the meantime, the combination of STCs and choosing the right tariff (such as Tariff 31) provides the best financial outcome for Gold Coast homeowners upgrading their hot water system.

Claiming your STC rebate is simple because you do not actually need to do any paperwork yourself. The process works through a point-of-sale assignment, and your installer manages everything. Here is how it works in five straightforward steps.

First, get a quote from a licensed installer. Your quote will show the full system price and the STC discount as a separate line item, so you can see exactly how much you are saving. Second, choose an eligible system from the Clean Energy Regulator's approved list — we only recommend and install eligible systems, so every option we present qualifies.

Third, schedule your installation at a time that suits you. Fourth, at the time of installation, you sign an STC assignment form. This is a simple one-page document that transfers your right to create STCs to the installer. It is the only piece of paperwork you need to deal with. Fifth, you pay the discounted price. The STC value has already been subtracted from your invoice — there is no waiting for a rebate cheque, no application to submit, and no government department to deal with.

The entire STC administration — creating the certificates, submitting them to the Clean Energy Regulator, and trading them — is handled by us. You simply enjoy the lower price on your new system. From your perspective, it is an instant discount applied at the point of sale.

There are several strategies to maximise the total savings on your hot water upgrade beyond the base STC rebate.

First, consider combining incentives. If you are a business owner, apply for QBEST funding before your installation to potentially stack a $1,000 to $12,500 grant on top of your STC discount. For residential customers, check with your energy retailer — some offer additional incentives or cashback for switching to efficient hot water systems.

Second, choose the right electricity tariff. Energex offers Tariff 31 (also called the controlled load or economy tariff) specifically for hot water systems. At approximately 14.5c/kWh compared to 28-32c/kWh on a standard tariff, Tariff 31 can reduce your hot water running costs by up to 50%. Heat pumps and electric-boost solar systems are both eligible for Tariff 31. This single change can save $200 to $400 per year on running costs.

Third, pair your heat pump with rooftop solar PV if you have panels. By running your heat pump during peak solar generation hours (typically 9am to 3pm), you can heat water using free solar electricity, reducing your running costs to as little as $50 to $150 per year.

Finally, do not delay your purchase. The STC deeming period ends in 2030, and the number of certificates generated decreases each year. Installing in 2026 locks in a higher rebate than waiting until 2027 or later. The difference can be $100 to $200 in lost rebate value per year of delay.