Revenue
$2.7b
+24.8% ↑ vs $2.2b
Operating earnings strengthened on record generation, while a non-recurring prior-period gain distorts the headline net-profit comparison.
Revenue context before the current result.
EBITDAF margin across covered periods.
Operating cash flow across covered periods.
Operating working-capital absorption or release by reporting period.
Key metrics
FY23 vs FY22
Revenue
$2.7b
+24.8% ↑ vs $2.2b
Net profit after tax
$103m
-78.0% ↓ vs $469m
Net cash inflow from operating activities
$578m
+64.2% ↑ vs $352m
Full-year dividend per share
21.8c
+9.0% ↑ vs 20.0c
EBITDAF
$841m
+44.8% ↑ vs $581m
Profit before tax
$142m
-72.2% ↓ vs $510m
Cash and cash equivalents
$75m
+15.4% ↑ vs $65m
Total assets
$9.4b
-2.5% ↓ vs $9.7b
What changed
Revenue grew 24.8% to NZ$2.7b.
PBT fell 72.2% to NZ$142m. The PBT-versus-NPAT growth gap of only 5.8 percentage points means the headline decline is dominated by the prior-year non-recurring item rather than tax, even though the effective tax rate normalised from 8.0% to 27.5%.
Operating cash flow rose 64.2% to NZ$578m, helped by a NZ$111m fall in trade debtors. Capex stepped up sharply from NZ$68m to NZ$296m, lifting capex intensity from 3.1% to 10.8% of revenue. Net debt eased to NZ$1.8b and leverage strengthened to 2.2x EBITDAF.
What matters
Management cites record generation and a full year of broader customer connections. With EBITDAF of NZ$841m and net debt at 2.2x EBITDAF (down from 3.3x), operating trajectory and balance-sheet capacity have improved together, which means the underlying earnings power has genuinely stepped up.
Tax and the prior-year disposal gain together account for the NPAT optics. A PBT-versus-NPAT growth gap of only 5.8 percentage points indicates the NZ$366m NPAT decline is overwhelmingly associated with last year's non-recurring gain not repeating. Investors evaluating like-for-like earnings should use EBITDAF or PBT against the FY22 base, not NPAT.
Capex intensity more than tripled in a single year. Total capex moved from NZ$68m to NZ$296m (capex/revenue 3.1% to 10.8%), signalling a step into a heavier investment phase. This matters because it will compress future free cash flow even if EBITDAF keeps growing, and it sets a higher bar for dividend coverage in FY24.
Expectations
No FY24 EBITDAF guidance is carried into the supplied extracts; the interim release referenced a normalised FY23 EBITDAF target of ~NZ$795m, which the reported NZ$841m exceeded.
The half-year shape is unusual: HY23 NPAT was NZ$230m, implying H2 NPAT of -NZ$127m. This reflects the timing of one-off items rather than a clean seasonal split, so the implied H2 loss is not a forward-looking indicator. For FY24 expectations, the more useful anchors are the EBITDAF run-rate and the elevated capex profile, not the reported NPAT shape.
Quality of result
Stripped of that release, conversion would have been close to the prior-year level. The debtor-day shift may reflect timing of wholesale settlements or customer billing patterns rather than a structural change, so another period is needed to confirm the new run-rate. This matters because reported FCF leans on a working-capital tailwind that may not recur.
Free cash flow of NZ$459m covers the full-year ordinary dividend at 56.2% of FCF, but the payout ratio versus NPAT of 293.0% is uninformative given the one-off-suppressed earnings base. With capex stepping up sharply, FCF coverage of the FY24 23.3c guidance is the more relevant forward test.
EBITDAF of NZ$841m looks durable: record generation, full-year retail scale, and a normalised tax rate together support the underlying read. The NPAT line is the noisy one.
Unresolved
This briefing cannot assess hydrology assumptions, hedge-book positioning, generation-mix economics, or segment-level margins, because the supplied extraction does not include current-period segment splits.
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Full year results presentation FY2023
FY23 / results presentationIntegrated report and financial statements FY2023
FY23 / financial reportNews Release
FY23 / media releaseResults Announcement FY2023
FY23 / results announcementAnnual report and financial statements FY2022
FY22 / financial reportFull year results presentation FY2022
FY22 / results presentationNews Release
FY22 / media releaseResults Announcement FY2022
FY22 / results announcementFinancial Results Announcement HY2023
HY23 / results announcementHY2023 Interim Report including unaudited financial statements
HY23 / financial reportHY2023 Results Presentation
HY23 / results presentationNews Release HY2023 Interim Results
HY23 / media releaseAnnual results webcast and teleconference details
FY22 / commentaryAnnual results webcast and teleconference details
FY23 / commentaryMercury Investor Day news release
FY23 / commentaryFY2023 EBITDAF guidance confirmed
HY23 / commentaryInterim results webcast and teleconference
HY23 / commentaryRelated insights
Cross-company views selected from the metrics in this briefing.
Earnings quality and statutory distortions
PBT and NPAT growth diverged by 5.8pp, with a distortion flag in the result.
Cash conversion quality
This result converted 68.7% of EBITDA to operating cash flow, +8.1pp versus the prior comparable period.
Dividend coverage and payout pressure
Dividend payout versus pre-lease FCF is 56.2%, with NPAT payout at 293.0%.
Revenue growth context
Revenue growth was 24.8% for this reporting period.
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