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Mercury NZ (MCY) / HY22

EBITDAF fell 17.7% on dry hydrology while reported NPAT tripled

A 5.1% effective tax rate and non-operating gains flattered headline profit even as FY22 EBITDAF guidance was cut to $570m.

Energy & Utilities / Integrated gentailer

MCY revenue trajectory

Revenue context before the current result.

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HY26 was $1.7b, versus $3.5b in FY25.

MCY EBITDAF margin

EBITDAF margin across covered periods.

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  • HY23 MCY: Unprecedented high ebitda margin. 34.7%; 4-period range 23.8% to 32.3%. EBITDA margin: 34.7%, unprecedented high; 4-period mean 27.7%, range 23.8%-32.3%.
  • FY23 MCY: Unprecedented high ebitda margin. 30.8%; 4-period range 22.5% to 26.6%. EBITDA margin: 30.8%, unprecedented high; 4-period mean 24.3%, range 22.5%-26.6%.
  • HY25 MCY: Unprecedented low ebitda margin. 23.8%; 4-period range 27% to 34.7%. EBITDA margin: 23.8%, unprecedented low; 4-period mean 30.4%, range 27.0%-34.7%.
  • FY25 MCY: Outside range low ebitda margin. 22.5%; 4-period range 22.6% to 30.8%. EBITDA margin: 22.5%, below normal range; 4-period mean 26.4%, range 22.6%-30.8%.
EBITDA margin: 22.5%, below normal range; 4-period mean 26.4%, range 22.6%-30.8%.

MCY operating cash flow

Operating cash flow across covered periods.

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HY26 was $351m, versus $483m in FY25.

MCY working-capital movement

Operating working-capital absorption or release by reporting period.

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  • FY22 MCY: Unprecedented high operating working-capital movement. $258m; 4-period range $-105m to $180m. Operating working-capital movement: NZ$258.0m, unprecedented high; 2/4 prior periods had builds averaging NZ$127.0m, and 2 had releases averaging NZ$-101.0m.
  • HY24 MCY: Unprecedented high operating working-capital movement. $539m; 4-period range $-17m to $0.1m. Operating working-capital movement: NZ$539.0m, unprecedented high; 2/4 prior periods had builds averaging NZ$0.1m, and 2 had releases averaging NZ$-17.0m.
  • FY25 MCY: Outside range low operating working-capital movement. $-105m; 4-period range $-97m to $258m. Operating working-capital movement: NZ$-105.0m, below normal range; 3/4 prior periods had builds averaging NZ$170.7m, and 1 had releases averaging NZ$-97.0m.
Operating working-capital movement: NZ$-105.0m, below normal range; 3/4 prior periods had builds averaging NZ$170.7m, and 1 had releases averaging NZ$-97.0m.
Release date
22 February 2022
Published
22 April 2026
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Key metrics

Numbers worth scanning first

HY22 vs HY21

Revenue

$0.87m

-7.5% ↓ vs $0.94m

Net profit after tax

$0.4m

+300.0% ↑ vs $0.1m

Net cash inflow from operating activities

$0.13m

-19.0% ↓ vs $0.16m

Interim dividend per share

8.0c

+17.6% ↑ vs 6.8c

EBITDAF

$0.24m

-17.7% ↓ vs $0.29m

Profit before tax

$0.5m

+150.0% ↑ vs $0.2m

Cash and cash equivalents

$0.05m

-47.3% ↓ vs $0.09m

Total assets

$8.5m

+25.2% ↑ vs $6.8m

What changed

Operating earnings deteriorated materially

EBITDAF fell 17.7% to $242m on revenue that declined 7.5% to $873m, with management attributing the result to dry weather reducing expected FY22 hydro generation by 150 GWh and prompting a guidance cut from $590m to $570m. Below the line, the picture inverts: PBT rose 150.0% to $450m and NPAT rose 300.0% to $427m, with the effective tax rate compressed to 5.1% from 21.7% in HY21 — an unprecedented low against the supplied historical range of 24.8%–30.2%.

Cash performance softened in step with earnings. Operating cash flow fell 19% to $132m, capex was cut 60.5% to $70m, and the interim dividend was lifted 17.6% to 8.0 cents per share despite the EBITDAF decline. Net debt rose to $1.6b, taking half-year-basis net debt/EBITDA to 6.68x.

What matters

Underlying operating earnings weakened more than the headline suggests

EBITDAF down 17.7% is the cleanest read on the business this half: hydrology and generation mix did the damage, and the guidance revision to $570m signals the second half will not fully recover the shortfall. For a gentailer, this is the metric that anchors dividend capacity and reinvestment headroom.

Reported NPAT is materially distorted by tax and non-operating items. PBT growth of 150.0% sits 150 percentage points below NPAT growth of 300.0%, and the PBT margin of 57.3% is well outside the supplied historical range (-5.5% to 23.1%). Combined with a 5.1% effective tax rate, the headline overstates operating progress; PBT growth is the cleaner figure, and even that reflects non-operating effects rather than trading.

Capital allocation tightened cash optics rather than improved them. The 17.6% lift in the interim dividend was funded against a falling operating cash flow, and free cash flow improved only because capex was halved. Net debt/EBITDA on the supplied basis sits at 6.68x — an unprecedented high against the 3.9x–5.0x historical range — which matters because leverage headroom narrows just as hydrology is pressuring earnings.

Expectations

The supplied second-half shape context is critical

HY21 contributed roughly 6% of FY21 EBITDAF and 9% of FY21 NPAT, so this half is a small fraction of the full-year result and the FY22 trajectory hinges on H2 hydrology, hedge positions and the Trustpower retail completion. Management has explicitly stated guidance excludes the Trustpower contribution and remains subject to one-off items and weather.

No quantified target beyond the revised $570m EBITDAF was supplied for FY22. The release acknowledges the acquisition is expected to complete in Q4 FY22, meaning material customer-book additions are not yet in the run-rate. The gap that matters is whether H2 hydrology normalises sufficiently to land within the revised guidance, given H1 already absorbed the disclosed dry-weather impact.

Quality of result

The durable read is the EBITDAF decline

Revenue down 7.5% and EBITDAF down 17.7% are consistent with a generation-mix problem rather than a customer-economics problem, and the guidance reset confirms management views the hydrology effect as persistent through FY22. Cash conversion at 54.5% is at the lower edge of the supplied historical range (54.3%–76.5%); operationally it is consistent with prior periods, but absolute OCF is lower because the earnings base is lower.

The reported profit gains are largely non-durable. The 5.1% effective tax rate is unprecedented in the supplied baseline (mean 27.5%) and is not a structural reset; reverting toward a normal rate alone would compress NPAT meaningfully. The PBT margin of 57.3% sits well above any prior observation in the supplied set, consistent with sector-typical fair-value or derivative gains flowing through the income statement rather than improved trading economics. FCF improved because capex was cut 60.5%, not because cash earnings improved.

Unresolved

Open questions

What specifically drove the effective tax rate to 5.1% versus 21.7% in HY21, and is any portion structural?
What non-operating or fair-value items pushed PBT margin to 57.3%, and how should investors expect these to reverse?
Why did capex fall 60.5% year-on-year, and is this timing or a sustained step-down?
How sensitive is the revised $570m FY22 EBITDAF guidance to further hydrology variance in H2?
What incremental EBITDAF contribution does management expect from Trustpower retail once Q4 FY22 completion occurs?

This briefing cannot assess the breakdown of the non-operating items inside PBT, the specific composition of the tax benefit, or the standalone economics of the Trustpower retail book that has not yet been consolidated.

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Ask follow-up questions about Mercury NZ's HY22 result.

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Informational only. No buy, sell, hold, price-target, or personal financial advice.

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Sign in to ask questions about Mercury NZ's HY22 result.

What specifically drove the effective tax rate to 5.1% versus 21.7% in HY21, and is any portion structural?Why does "Underlying operating earnings weakened more than the headline suggests" matter?How strong was the cash and earnings quality in HY22?What should I watch next for MCY after HY22?

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Data appendix

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Sources

Current period

2022 Interim Report including unaudited financial statements and Auditor's Review Report

HY22 / financial report↗

News Release

HY22 / media release↗

Results Announcement HY2022

HY22 / results announcement↗

Prior comparable period

2021 Interim Report including unaudited financial statements and Auditor's Review Report

HY21 / financial report↗

News Release

HY21 / media release↗

Results Announcement HY2021

HY21 / results announcement↗

Full-year context

Annual report and financial statements FY2021

FY21 / financial report↗

News Release

FY21 / media release↗

Results Announcement FY2021

FY21 / results announcement↗

Release context

FY2022 EBITDAF Guidance revised to $570 million

HY22 / commentary↗

Interim results webcast and teleconference details

HY22 / commentary↗

Related insights

Cross-company views selected from the metrics in this briefing.

Earnings quality and statutory distortions

PBT and NPAT growth diverged by 150.0pp, with a distortion flag in the result.

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Cash conversion quality

This result converted 54.5% of EBITDA to operating cash flow, -0.9pp versus the prior comparable period.

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Leverage and balance-sheet risk

Net debt / EBITDA is 6.68x, +2.41x versus the prior comparable period.

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Dividend coverage and payout pressure

Dividend payout versus NPAT is 25.5%.

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This briefing is based on available company filings and standard Annolyse calculations. It is general information only and does not constitute financial advice. The analysis may contain errors. Always read the original company filings and consult a licensed financial adviser before making investment decisions.

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