Table of Contents
What changed
Revenue for HY24 rose 23.6% to NZ$1,605m, but this figure is largely a pass-through story: the wholesale electricity market is volumetric and price-driven, and higher revenues did not flow through to earnings. EBITDAF fell 3.8% to NZ$434m, PBT dropped 19.9% to NZ$245m, and NPAT declined 24.3% to NZ$174m. The gap between PBT and NPAT movement reflects a higher effective tax rate (29.0% versus 24.8%) as pre-tax profit fell while deductions did not scale proportionally.
The two segment results explain the EBITDAF story. Generation/Wholesale segment EBITDAF rose modestly to NZ$454m from NZ$441m, but its implied margin compressed to around 40.5% from 52.7% as revenue in that segment surged from NZ$837m to NZ$1,120m. Retail swung to a segment EBITDAF loss of NZ$20m from a NZ$11m profit in HY23, meaning the retail book erased the wholesale earnings gain and then some.
Operating cash flow fell NZ$62m to NZ$283m, capex almost doubled to NZ$132m from NZ$75m, and implied pre-lease free cash flow dropped to NZ$151m from NZ$270m. Gross borrowings rose to NZ$2,020m from NZ$1,814m, lifting estimated net debt to around NZ$1.94bn.
What matters
Retail turning loss-making is the most important development. A swing of NZ$31m at the EBITDAF line in the retail segment is not a rounding issue—it signals that Mercury is either buying wholesale electricity above what it recovers in retail tariffs, or that customer acquisition and retention costs have risen materially in a competitive market, or both. Until this reverses, retail acts as a drain on the group's core earnings pool rather than a diversifier.
The below-EBITDAF cost build is accelerating. PBT fell nearly NZ$61m on only a NZ$17m EBITDAF decline, meaning depreciation, net interest charges, and fair-value movements together consumed an additional ~NZ$44m year-on-year. The filing attributes this to higher depreciation, higher interest charges, and net fair-value changes. With gross borrowings up NZ$206m and net debt/EBITDAF moving from approximately 3.9x to 4.5x, the interest line is structurally higher going forward, not a one-period anomaly.
Cash conversion deteriorated materially. OCF-to-EBITDAF fell to 65.2% from 76.5%. Inventories rose NZ$24m to NZ$145m, though the absence of disclosed receivables and payables detail prevents a full working capital diagnosis. Combined with the capex step-up, FCF available to shareholders has roughly halved compared with the prior half.
Expectations
No quantified full-year earnings guidance or EBITDAF target was provided in the filing. No forward-work backlog figure is applicable given Mercury's utility business model.
Historical seasonality is relevant context: in FY23, HY23 represented 53.6% of full-year EBITDAF, implying the second half is structurally softer—the implied FY23 second-half EBITDAF was NZ$390m. NPAT is more volatile; the FY23 second half was deeply negative (implying roughly -NZ$127m) due to large fair-value movements, which is not necessarily a guide to HY24 second-half NPAT but does indicate that mark-to-market swings can dominate the statutory result.
At HY24's run rate, annualised revenue of NZ$3,210m is about 17.6% above full-year FY23 revenue of NZ$2,730m. However, given the retail loss and ongoing cost pressures, annualising the EBITDAF of NZ$434m to NZ$868m would represent only a marginal improvement on FY23's NZ$841m, and that assumes no seasonal softening in the second half—which history suggests is unlikely.
The interim dividend of 9.3 cents per share (up 6.9% on HY23's 8.7 cents) is covered by pre-lease FCF, but the payout ratio against FCF rose to 85.6% from 43.9%, leaving considerably less headroom.
Quality of result
The result has meaningful durability concerns. Revenue growth is largely price and volume pass-through in the wholesale/generation segment and does not translate to proportional operating earnings. The retail loss introduces a recurring drag that will persist until tariff structures or cost bases are repriced. The interest cost step-up from the NZ$206m borrowing increase is permanent at current rates.
The fair-value movements cited as a driver of PBT underperformance relative to EBITDAF are mark-to-market on hedging instruments and can reverse, but they are also directionally consistent with a position where Mercury is hedged against prices that subsequently moved adversely—so the economic cost may be real rather than purely accounting.
Cash conversion at 65.2% of EBITDAF is below what would typically be expected for a regulated-adjacent utility business with largely non-discretionary operating costs, and the inventory build adds a modest working-capital drag. Capex at NZ$132m for the half, against NZ$75m in HY23, reflects growth investment (likely renewable build) that is value-accretive in the long run but compresses near-term FCF.
The dividend increase, while modest in absolute terms, is being paid against a backdrop of halved FCF and rising debt—raising the question of whether the payout policy is calibrated to the current earnings cycle or anchored to a trajectory that assumes stronger second-half earnings.
Unresolved
- What is driving the retail EBITDAF loss specifically? The filing does not quantify whether the NZ$31m swing is margin compression on existing customers, new customer acquisition losses, or a structural wholesale/retail spread problem. This is the most consequential unknown for the medium-term earnings outlook.
- What is the trajectory of net debt? With net debt/EBITDAF at approximately 4.5x and capex elevated, the pace of any deleveraging path or covenanted limits is not disclosed in the supplied materials.
- What is the composition of fair-value movements? The magnitude and direction of derivative fair-value changes embedded in PBT can reverse sharply, yet their economic character—whether they represent real hedging costs or pure accounting timing—is not resolved from the disclosures supplied.
- Is the capex step-up sustaining or peaking? NZ$132m in a single half is materially above recent run-rates; the project pipeline and committed spend beyond HY24 are not quantified in the excerpts provided.
This briefing cannot assess Mercury's competitive position in the retail electricity market or the likelihood that the retail segment returns to profitability within a defined timeframe.
Key metrics
| Metric | HY24 | HY23 | Change |
|---|---|---|---|
| Revenue | $1605m | $1299m | +23.6% ↑ |
| Net profit after tax | $174m | $230m | -24.3% ↓ |
| Net cash inflow from operating activities | $283m | $345m | -18.0% ↓ |
| Interim dividend per share | 9.3c | 8.7c | +6.9% ↑ |
| Profit before tax | $245m | $306m | -19.9% ↓ |
| Cash and cash equivalents | $82m | $53m | +54.7% ↑ |
| Total assets | $9518m | $9634m | -1.2% ↓ |
Source: annolyse.ai/briefings/mcy-hy24
Segment breakdown
| Segment | Current revenue | Prior revenue | Current result | Mix shift |
|---|---|---|---|---|
| Generation/Wholesale | $1120m | $837m | $454m | +4.7pp |
| Retail | $810m | $734m | −$20m | -4.7pp |
| Other | — | −$1m | — | n/a |
Source: annolyse.ai/briefings/mcy-hy24
Analytical metrics
| Metric | HY24 | HY23 | Context |
|---|---|---|---|
| PBT growth | -19.9% | — | cleaner earnings measure |
| Effective tax rate | 29.0% | 24.8% | — |
| OCF / EBITDAF (cash conversion) | 65.2% | 76.5% | deteriorated |
| FCF pre-lease | $151.0m | $270.0m | −$119.0m |
| FCF / NPAT | 86.8% | 117.4% | complementary conversion metric |
| Capex % revenue | 8.2% | 5.8% | — |
| Capex | −$132.0m | −$75.0m | −$57.0m |
| Net debt | $1938.0m | $1761.0m | +$177.0m |
| Net debt / EBITDAF | 4.47x | 3.90x | Weakening |
| Gross borrowings | $2020.0m | $1814.0m | +$206.0m |
| Payout ratio vs NPAT | 74.3% | — | — |
| Payout ratio vs FCF pre-lease | 85.6% | — | covered |
| ROE (annualised) | 3.6% | 4.8% | Weakening |
| HY23 share of FY23 revenue | 47.6% | — | Other half was 52.4% |
| HY23 share of FY23 EBITDAF | 53.6% | — | Other half was 46.4% |
| HY23 share of FY23 NPAT | 223.3% | — | Other half was -123.3% |
| Profit from continuing operations | $174.0m | $230.0m | −$56.0m |
Source: annolyse.ai/briefings/mcy-hy24
This analysis was generated using Annolyse, an AI-powered tool that extracts and analyses NZX/ASX company announcements. The underlying data is extracted from official company filings and verified against source documents. This 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.