Singapore Electricity Tariff History 2015 to 2026: What the Trend Means for Solar ROI
Singapore's electricity tariff has risen approximately 58% from 2015 to Q3 2026. The long-term trend, driven by natural gas import costs and carbon pricing, means every S$0.01 tariff increase adds roughly S$110 per year to the return on a 10kWp solar system.
Key Takeaways
- 1
Singapore's residential electricity tariff has risen from around S$0.22/kWh in 2015 to S$0.3478/kWh in Q3 2026 — a 58% increase over 11 years
- 2
Every S$0.01 increase in the tariff adds approximately S$110 to the annual saving of a 10kWp Singapore solar system
- 3
The 2022 energy crisis spike showed how quickly tariffs can move upward — solar locks in a zero-fuel-cost generation source before the next spike arrives
Singapore's electricity tariff is not fixed. It changes every quarter, reviewed by the Energy Market Authority and reflecting natural gas import costs, network charges, and increasingly, carbon pricing. From 2015 to Q3 2026, the residential tariff has moved from approximately S$0.22/kWh to S$0.3478/kWh, a rise of roughly 58% over eleven years. That trend is the single most important macro factor behind Singapore solar's improving economics.
How the Tariff Is Set
Singapore generates over 95% of its electricity from imported natural gas. The tariff reflects three main components: the energy cost (dominated by gas prices), the network cost (grid infrastructure), and the market support services fee. EMA reviews all three quarterly and publishes the result via SP Group. Homeowners on the regulated tariff, the default for most residential customers, pay whatever the quarterly rate is, with no ability to hedge or lock in a rate.
This is the core vulnerability that solar addresses. A solar system installed in 2026 generates electricity at zero fuel cost. The panels do not care what gas costs in 2031. Once the system is paid back, around year four for a well-specified Singapore terrace installation, every subsequent kWh is free electricity in the face of whatever tariff SP Group publishes next.
Key Inflection Points: 2015 to 2026
2015 to 2020: moderate and relatively stable. The pre-COVID period saw tariffs broadly in the S$0.21 to S$0.26/kWh range, tracking global gas prices which were generally lower than the post-2021 era. Payback periods for solar during this period were longer, around six to eight years, which explains why Singapore's residential solar adoption accelerated sharply only after 2021.
2021 to 2022: the energy crisis spike. Global LNG prices surged following supply chain disruptions and the Russia-Ukraine conflict's effect on European gas markets (which redirected LNG flows globally). Singapore, importing all its gas, absorbed these costs through the regulated tariff. By Q4 2022, the residential tariff had climbed to the S$0.30+ range, compressing solar payback periods by over two years in a single calendar year. This period demonstrated precisely why tariff exposure is the core risk for households without generation assets.
2023 to 2025: elevated and stabilising. Gas prices moderated from their 2022 peaks but did not return to pre-crisis levels. Singapore's tariff settled into the S$0.28 to S$0.34/kWh range. Carbon tax increases. S$25/tonne from 2024, S$45/tonne in 2026, scheduled to reach S$50 to S$80/tonne by 2030, began flowing into the energy cost component, adding a structural upward pressure that did not exist before 2024.
Q3 2026: S$0.3478/kWh. This is the current published rate used in all Sunnify calculations. The EMA website publishes the quarterly tariff notice with a full breakdown by tariff component. The complete historical quarterly data from SP Group's published tariff notices is the authoritative source for the specific figures each quarter.
How Each S$0.01 Tariff Change Affects a 10kWp System
This is the calculation that transforms the abstract tariff trend into a concrete number for solar investors. A 10kWp Singapore terrace system generates approximately 11,060 kWh per year. With 25% consumed directly and 75% exported, a S$0.01 increase in the residential tariff does the following:
Self-consumed component: 2,765 kWh × S$0.01 = S$27.65 more value per year. Exported component: 8,295 kWh × roughly S$0.0074 (the SCT typically adjusts proportionally to the tariff) = S$61.40 more per year. Total impact of each S$0.01 tariff increase: approximately S$89 to S$110 per year, depending on how the SCT adjusts.
Over 25 years, even without compounding, a S$0.05 tariff increase from today, reaching S$0.3978/kWh, adds approximately S$5,500 in additional lifetime savings to the same 10kWp system. The tariff history suggests this level of increase is not a hypothetical. It has already happened once from 2015 to 2026.
Solar does not require the tariff to go up. It just requires you to keep using electricity — which you will, regardless of the price. The installed panels deliver the same kWh in 2035 whether the tariff is S$0.30 or S$0.45.
The long-term tariff outlook in Singapore points upward for two structural reasons: natural gas import costs are tied to global LNG markets that are pricing in energy transition pressures, and carbon tax escalation to S$50 to S$80/tonne by 2030 adds a component that did not exist before 2024. Neither trend is certain, but both work in one direction. Solar payback calculations that assume flat tariffs for 25 years are, if anything, conservative.
For a personalised calculation that uses the current tariff and your specific system size, the Sunnify estimate tool runs the numbers in real time. The cost and payback guide shows worked examples across multiple tariff escalation scenarios.
Further reading: SP Group tariff rates history · Data.gov.sg electricity tariff dataset.
Where can I find the complete historical Singapore electricity tariff data?
The Energy Market Authority website publishes quarterly tariff notices with current and recent tariff levels broken down by component. SP Group's website also publishes the current residential tariff. For historical quarterly figures going back to 2015, EMA's statistics publications and SP Group's archived tariff notices are the authoritative sources. These documents are publicly available and the figures in them have been reviewed against published utility billing records.
Does the Solar Crediting Tariff (SCT) change when the electricity tariff changes?
Yes. The SCT is set at a discount to the prevailing tariff, reflecting wholesale generation costs minus the retail network and service components. When EMA revises the quarterly tariff upward, the SCT typically moves in the same direction, though not always by the same percentage or amount. For Q3 2026, the SCT is S$0.2581/kWh versus the retail tariff of S$0.3478/kWh, representing approximately 74% of the retail rate. This ratio is not fixed and should be checked quarterly at EMA's published notices if your financial model is sensitive to export revenue.
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What does this mean for your home?
Tariffs and technology change the math. The calculator uses current SP figures to show your actual payback and savings.
