Power & Infrastructure · Regulated Utilities
Utility P/E Premiums and Rate-Base Growth
P/E premium screening bands tied to rate-base CAGR, the Dominion versus Duke calibration pair, and when FFO/debt headroom caps the growth multiple.
Selborne Research · Regulated Utilities coverage: 8 guides, 6 company profiles, a primer and Excel model
Educational analysis. This guide is not investment advice or a recommendation to buy or sell any security, and it is not personalised.
On this page
- Rate-Base Growth Moves the Multiple Even When EPS Growth Looks the Same
- P/E Premium Screening Bands
- Calibration Pair: Dominion vs Duke
- Southern Company's Growth Plan and the Vogtle Overhang
- Hybrid Names Need an Adjustment Before the Screening Bands Apply
- Mini-Example: Two Turns per 200 bps
- Link Back to the EPS Build
- What Matters Most
Rate-Base Growth Moves the Multiple Even When EPS Growth Looks the Same
Utility equity is often described as bond-like. That misses the growth axis. When allowed ROE sits inside the ~9%–10% band and FFO/debt clears the ~14%–16% investment-grade screen, forward P/E expands with stated rate-base CAGR.
Two companies can both guide 5%–7% EPS growth and still land at different points on the screen, because one is compounding regulated assets at 10.2% and the other at ~9.6%.
P/E Premium Screening Bands
No published industry standard exists for this mapping. Typical screening thresholds:
| Stated rate-base CAGR | P/E vs peer median | Premium (turns) |
|---|---|---|
| <7% | In-line | 0 |
| 7%–9% | Modest premium | +1 to +2 |
| 9%–11% | Premium | +2 to +4 |
| >11% | Full growth premium | +4 to +5, capped at 22× |
Model sensitivity default: ±2 P/E turns per 200 bps of rate-base CAGR change.
The bands assume allowed ROE sits inside the normal range and credit is not the binding constraint. Either breaks the link.
Calibration Pair: Dominion vs Duke
Both are large Southeast-regulated names with similar EPS growth guidance and different rate-base trajectories (caps as of 9–10 Jun 2026):
| Metric | Dominion Energy (D) | Duke Energy (DUK) |
|---|---|---|
| Rate base (FY2025) | $48.2B Virginia (+ $11.4B South Carolina) | $103.1B |
| Stated RB CAGR | 10.2% group through 2030 (Virginia 11.9% to $85.7B) | ~9.6% through 2030 |
| Weighted avg allowed ROE | 10.3% | 9.8%–10.3% by opco |
| FY2025 EPS | $3.42 operating | $6.31 |
| EPS growth target | 5%–7% to 2030 | 5%–7% to 2030 |
| FFO/debt | 15.3% | 14.8% (15% LT target) |
| Market cap | ~$58.0B (9 Jun 2026) | ~$97.3B (10 Jun 2026) |
Base size and growth speed are two different variables. Duke’s $103.1B base is about 1.7 times Dominion’s $59.6B across Virginia and South Carolina, yet Dominion’s stated group CAGR of 10.2% is faster than Duke’s ~9.6%. The screening framework keys off the growth rate.
Project and regulatory risk sit outside the rate-base CAGR line. Dominion carries the Coastal Virginia Offshore Wind project and a single-state Virginia regulatory relationship; Duke’s footprint spans multiple states and regulators.
Southern Company’s Growth Plan and the Vogtle Overhang
Southern Company plans 9% state-regulated rate-base growth through 2030 on a ~$60B plan-base ($81B 2026–2030 capex) with 8% adjusted EPS growth and 14.8% FFO/debt. Vogtle Units 3–4 are a nuclear-completion overhang that can widen the gap between allowed and earned returns in any given year, a risk the rate-base CAGR figure alone does not show.
Hybrid Names Need an Adjustment Before the Screening Bands Apply
NextEra (~$178B cap, 10 Jun 2026) and Sempra (~$59.4B cap, 9 Jun 2026) both carry non-regulated earnings streams alongside their regulated business, NextEra Energy Resources’ renewables and Sempra’s LNG. Their consolidated P/E blends the regulated, screenable piece with a merchant business the rate-base framework above was not built to price, so the screening bands need a discount for the blend before they apply cleanly to either name.
Sempra plans 11% rate-base CAGR to $97B by 2030, with a derived FFO/debt of about 13.5%, inside 50 bps of Moody’s 14% threshold. High rate-base growth paired with tight credit is the combination the equity-issuance screen flags as a likely trigger for new equity.
Mini-Example: Two Turns per 200 bps
Hypothetical peer median forward P/E: 17×, the median the primer’s screen uses.
Utility A: 9% rate-base CAGR → screening band +2 to +4 turns → 19–21× range.
Utility B: 11% rate-base CAGR → +4 to +5 turns → 21–22× range, the top of which is the screen’s 22× cap.
Move Utility B’s plan from 11% to 9% (−200 bps): model default shaves ~2 turns → 19–20×, holding ROE and credit constant.
If FFO/debt simultaneously falls from 16% to 14.2% (within 50 bps of the floor), issuance risk can absorb part of that premium regardless of the rate-base plan.
Link Back to the EPS Build
The regulated EPS build explains why EPS CAGR trails rate-base CAGR. P/E premium analysis asks a different question: how much duration is in the regulated asset compound, and can the balance sheet fund it without dilution?
When EPS targets converge (5%–7% for both D and DUK) but rate-base CAGRs diverge (10.2% vs ~9.6%), the EPS line alone misses that difference in growth duration, and the screening bands are built to carry it.
What Matters Most
Read stated rate-base CAGR from the IR plan, map it to the screening band, then check FFO/debt before you assume the full premium. Dominion versus Duke is the cleanest large-cap pair for the exercise: similar EPS guidance, different growth duration, caps ~$58B versus ~$97B (Jun 2026).
Regulated Utilities Sector Primer
Earned net income less the growth in regulated equity capital drives the free-cash-flow-to-equity build, priced off rate base and allowed ROE, screened against payout, P/E and FFO-to-debt.
- 15 sections, rate-base roll-forward to a discounted cash-flow value
- 42 pages
- a high-growth utility and a steady compounder
- 2 worked archetypes
- rate-base growth, allowed ROE, FFO-to-debt headroom, payout
- 6-company screen
The Excel model is the primer's two archetype builds live across 13 sheets: free cash flow to equity, earned net income less the increase in the regulated equity book, discounted at the cost of equity, on rate base, equity ratio and allowed ROE, with the rate-base roll-forward, the FFO-to-debt headroom screen and the funding plan on their own sheets. Change the rate-base growth, the allowed ROE or the cost of equity and the value per share moves; the credit and funding sheets update alongside it.
See what's in the Regulated Utilities Sector Primer →£25 PDF · £59 with the Excel model · £159 for all three Power & Infrastructure industries
Frequently Asked Questions
- Why do utility P/E multiples differ when EPS growth looks similar?
- Forward P/E can differ with stated rate-base CAGR even when allowed ROE and credit are not the binding constraint. Two utilities guiding similar near-term EPS growth, one at a 10.2% rate-base CAGR and another at 9.6%, are still compounding a different amount of regulated asset base each year, and that duration difference is what a rate-base-driven screening framework is built to separate out.
- What P/E premium does rate-base growth command?
- Typical screening bands: rate-base CAGR below 7% earns in-line P/E; 7%–9% adds roughly 1–2 turns versus median; 9%–11% adds 2–4 turns; above 11% adds 4–5 turns, with the screen capped at 22x. The model sensitivity default is ±2 P/E turns per 200 bps of rate-base CAGR. These are screening bands; no published industry standard exists.
- How do Dominion and Duke compare on rate-base growth?
- Dominion plans 10.2% group rate-base CAGR to 2030 (its Virginia utility 11.9% over 2026-2030, to $85.7B; $48.2B at end-2025), with 5%–7% EPS growth and ~$58B market cap (9 Jun 2026). Duke plans ~9.6% CAGR on a $103.1B base, 5%–7% EPS growth, and ~$97.3B cap (10 Jun 2026). Similar EPS bands, different rate-base growth and hybrid mix, which is why the screen keys off growth.
- When does credit cap the P/E premium?
- When FFO/debt sits within ~50 bps of the investment-grade floor (~14%) and rate-base CAGR exceeds 9%, funding the growth plan without new equity gets harder, and this site's screening framework treats that combination as a headwind to the growth premium a screening band would otherwise imply. Sempra's derived FFO/debt of about 13.5% and American Electric Power's Moody's-basis figure of 13.9% both sit in that zone while both run double-digit rate-base growth, the same combination this site's funding-gate guide flags as a likely trigger for equity issuance.
Read next
The Regulated Utility EPS Build
RB × equity ratio × allowed ROE → regulated earnings; worked $40B example; ~12-month lag caveat.
FFO/Debt: the Utility Funding Gate
14%–16%+ screening threshold; agency scorecards not cutoffs; equity-issuance flag (D/SRE/AEP live cases).
Utility FFO/Debt Benchmarks: Six US Peers
FFO/debt is the rating agencies' cash coverage test. Ranks six US utilities' FY2025 coverage against a stated screen, basis labelled per row.
See it applied
These company profiles apply the concepts from this guide to real public companies.