Tecogen Inc. (TGEN) Revenue History
Annual and quarterly revenue from 2014 to 2025
Compound Annual Growth Rate (CAGR)
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TGEN Revenue Growth
Revenue Breakdown (FY 2024)
TGEN's revenue distribution by segment and geography for fiscal year 2024
By Product/Segment
By Geography
TGEN Revenue Analysis (2014–2025)
As of May 7, 2026, Tecogen Inc. (TGEN) generated trailing twelve-month (TTM) revenue of $27.1 million, reflecting significant decline in growth of -12.5% year-over-year. The most recent quarter (Q4 2025) recorded $5.3 million in revenue, down 26.0% sequentially.
Looking at the longer-term picture, TGEN's 5-year compound annual growth rate (CAGR) stands at -0.9%, indicating revenue contraction over this period. The company achieved its highest annual revenue of $35.9 million in 2018.
Revenue diversification analysis shows TGEN's business is primarily driven by Service (71%), Product (20%), and Energy Service (9%). With over half of revenue concentrated in Service, the company maintains significant focus in this area while developing other growth vectors.
When compared to Industrials sector peers including CDTX (-100.0% YoY), PESI (+4.3% YoY), and AMTX (-26.2% YoY), TGEN has underperformed the peer group in terms of revenue growth. Compare TGEN vs CDTX →
TGEN Revenue vs Peers
Revenue metrics vs comparable public companies
| Company | TTM Revenue | YoY Growth | 5Y CAGR | Op. Margin | Compare |
|---|---|---|---|---|---|
| TGENCurrent | $27M | -12.5% | -0.9% | -26.3% | |
 CDTX | $1M | -100.0% | -42.9% | -13811.9% | |
 PESI | $62M | +4.3% | -10.2% | -19.0% | |
 AMTX | $208M | -26.2% | +4.7% | -17.9% | |
 CLNE | $425M | +2.2% | +7.8% | - | |
 GNRC | $4.2B | -0.5% | +11.1% | 6.9% |
TGEN Historical Revenue Data (2014–2025)
| Year | Revenue | YoY % | Gross Profit | Gross Margin | Op. Income | Op. Margin |
|---|---|---|---|---|---|---|
| 2025 | $27.1M | +19.7% | $9.8M | 36.3% | $-7,131,518 | -26.3% |
| 2024 | $22.6M | -10.0% | $9.9M | 43.6% | $-4,534,087 | -20.0% |
| 2023 | $25.1M | +0.5% | $10.2M | 40.6% | $-4,413,612 | -17.6% |
| 2022 | $25.0M | +2.5% | $11.1M | 44.3% | $-2,349,141 | -9.4% |
| 2021 | $24.4M | -13.6% | $11.6M | 47.5% | $-1,219,092 | -5.0% |
| 2020 | $28.3M | -15.5% | $10.8M | 38.3% | $-5,960,313 | -21.1% |
| 2019 | $33.4M | -6.8% | $12.5M | 37.3% | $-4,658,581 | -13.9% |
| 2018 | $35.9M | +8.1% | $13.6M | 37.9% | $-5,538,309 | -15.4% |
| 2017 | $33.2M | +35.6% | $13.0M | 39.0% | $225K | 0.7% |
| 2016 | $24.5M | +14.2% | $9.3M | 38.0% | $-997,451 | -4.1% |
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Start ComparisonTGEN — Frequently Asked Questions
Quick answers to the most common questions about buying TGEN stock.
Is TGEN's revenue growth accelerating or slowing?
TGEN revenue declined -12.5% year-over-year, contrasting with the 5-year CAGR of -0.9%. TTM revenue fell to $27M. This reverses the prior growth trend.
What is TGEN's long-term revenue growth rate?
Tecogen Inc.'s 5-year revenue CAGR of -0.9% reflects the variable expansion pattern. Current YoY growth of -12.5% is below this long-term average.
How is TGEN's revenue distributed by segment?
TGEN reports revenue by product line and geographic region. Annual and quarterly breakdowns from 2014-2025 are available for download. Segment mix reveals concentration and diversification trends.