Table of Contents
What changed
Revenue jumped NZ$694m to NZ$3.4bn (+25.4%), but EBITDAF — Mercury's primary operating earnings measure, which strips out fair-value changes on financial instruments — rose only NZ$36m to NZ$877m (+4.3%). The gap between revenue and EBITDAF growth is the central feature of the result: higher spot electricity prices inflated gross revenue, but were largely passed through or hedged away at the operating earnings level.
PBT tripled from NZ$142m to NZ$415m (+192%), and NPAT followed from NZ$103m to NZ$290m (+182%). This recovery is almost entirely explained by the swing in net fair-value changes on financial instruments — the same line that crushed the FY23 result relative to FY22 EBITDAF. The FY23 comparison was also depressed by the absence of the Tilt Renewables disposal gain that had boosted FY22's NZ$469m NPAT figure, making the base unusually soft.
Operating cash flow rose modestly to NZ$612m (from NZ$578m), and disclosed free cash flow was NZ$470m. The total ordinary dividend for FY24 was 23.3 cents per share, up 7% on FY22's 21.8 cents, with the final dividend of 14.0 cents per share announced (13.1 cents prior). Gross borrowings edged up NZ$43m to NZ$1.94bn; net debt was broadly flat at approximately NZ$1.90bn, or about 2.16x EBITDAF.
What matters
1. The PBT recovery is real but largely mark-to-market, not operational. EBITDAF of NZ$877m grew just 4.3%. The dramatic improvement in PBT and NPAT reflects favourable fair-value movements on hedging instruments — the mirror image of what depressed FY23 below its EBITDAF. Investors relying on NPAT growth as a signal of improved underlying earnings quality would be overstating the operational story.
2. Working capital deterioration warrants monitoring. Trade debtors rose 42% to NZ$502m even as revenue grew 25%, stretching receivable days from 47.2 to 53.5 days — a 6.3-day blowout. Inventories also rose 32% to NZ$120m. Operating working capital increased NZ$178m to NZ$622m. This partially explains why OCF growth (+5.9%) tracked well below EBITDAF growth (+4.3% from a similar base), and it introduces a latent cash flow risk if high spot prices normalise and debtor balances must be unwound.
3. Leverage is stable but capex is rising. Net debt/EBITDAF held near flat at 2.16x, which is manageable. However, capex rose to NZ$296m from NZ$250m and the company's own messaging signals ongoing investment in renewable capacity. The FCF of NZ$470m covers the dividend comfortably (payout ratio ~41% of FCF), but rising capex will increasingly compete for that headroom.
Expectations
No formal earnings guidance or EBITDAF target for FY25 was disclosed in the release materials, so assessment against stated targets is not possible.
On a half-on-half basis, H1 FY24 EBITDAF of NZ$434m and H2 of NZ$443m were broadly balanced, which is consistent with a regulated/hydro-generation business where seasonality is meaningful but not extreme. The H1 NPAT of NZ$174m versus H2 of NZ$116m reflects the timing of fair-value movements rather than an underlying earnings deterioration in the second half.
The CEO commentary indicates electricity price pressure is expected to continue for some time. With 98% of sales volume contracted or hedged across retail customer groups, Mercury is largely insulated from spot volatility at the revenue-to-customer level. The read-through is that EBITDAF in FY25 will depend primarily on hydrology, volume, and cost control — the same drivers that produced only modest EBITDAF growth in FY24 despite extraordinary spot price conditions.
Quality of result
The EBITDAF result is the most durable component: NZ$877m represents genuine recurring operating performance from generation and retail, and OCF conversion at 69.8% of EBITDAF is consistent with the prior year (68.7%), suggesting no structural deterioration in cash generation quality.
The PBT and NPAT figures are lower quality in a durability sense. The NZ$273m PBT swing is substantially explained by fair-value movements on financial instruments — a line that reverses across periods depending on the interest rate and energy price curve. An investor using PBT as the operating read should isolate the EBITDAF trend (modest improvement) rather than the headline PBT recovery.
The working capital build — particularly the NZ$149m increase in trade debtors — is a timing concern. High spot electricity prices tend to inflate unbilled and billed receivables; if prices mean-revert, the cash release would be a one-time tailwind. Conversely, if prices remain elevated, collection risk rises.
ROE improved to 6.0% from 2.1%, but equity was flat at NZ$4.85bn, so the improvement is entirely a function of the higher (fair-value-assisted) NPAT rather than any change in capital efficiency.
Unresolved
- The exact composition of the NZ$694m revenue increase — how much is volume versus price versus pass-through — is not disclosed in the supplied materials, making it difficult to assess organic growth quality.
- The nature and quantum of the fair-value movements driving PBT above EBITDAF are not decomposed in the release excerpts; without the full hedging book position, the sustainability of the PBT level cannot be assessed.
- The 53.5-day debtor position is elevated; the release does not disclose the ageing profile or any change in credit provisions, leaving the risk of bad debt or forced writedowns unquantified.
- Capex guidance for FY25 and the composition of the NZ$296m spend between maintenance and growth are not provided, making it difficult to judge the trajectory of free cash flow under a flat-to-declining EBITDAF scenario.
This briefing cannot assess whether the fair-value movements embedded in PBT represent economic gains or will reverse in FY25, as the full hedging book mark-to-market position is not available in the supplied materials.
Key metrics
| Metric | FY24 | FY23 | Change |
|---|---|---|---|
| Revenue | $3424m | $2730m | +25.4% ↑ |
| Net profit after tax | $290m | $103m | +181.6% ↑ |
| Net cash inflow from operating activities | $612m | $578m | +5.9% ↑ |
| Final dividend per share | 14.0c | 13.1c | +6.9% ↑ |
| Profit before tax | $415m | $142m | +192.3% ↑ |
| Cash and cash equivalents | $44m | $75m | -41.3% ↓ |
| Total assets | $9795m | $9419m | +4.0% ↑ |
Source: annolyse.ai/briefings/mcy-fy24
Analytical metrics
| Metric | FY24 | FY23 | Context |
|---|---|---|---|
| PBT growth | +192.3% | — | cleaner earnings measure |
| Effective tax rate | 30.1% | 27.5% | — |
| OCF / EBITDAF (cash conversion) | 69.8% | 68.7% | stable |
| FCF pre-lease | $470.0m | — | — |
| FCF / NPAT | 162.1% | — | complementary conversion metric |
| Capex % revenue | 8.6% | 9.2% | — |
| Capex | $296.0m | −$250.0m | +$546.0m |
| Free cash flow | $470.0m | — | — |
| Debtor days | 53.5 | 47.2 | +6.3 days |
| Inventory days | 12.8 | 12.2 | +0.6 days |
| Operating working capital | $622.0m | $444.0m | +$178.0m absorbed |
| Trade debtors | $502.0m | $353.0m | +$149.0m |
| Net debt | $1897.0m | $1823.0m | +$74.0m |
| Net debt / EBITDAF | 2.16x | 2.17x | Strengthening |
| Gross borrowings | $1941.0m | $1898.0m | +$43.0m |
| Payout ratio vs NPAT | 67.1% | — | — |
| Payout ratio vs FCF pre-lease | 41.4% | — | covered |
| ROE (annualised) | 6.0% | 2.1% | Strengthening |
| HY24 share of FY24 revenue | 46.9% | — | Other half was 53.1% |
| HY24 share of FY24 EBITDAF | 49.5% | — | Other half was 50.5% |
| HY24 share of FY24 NPAT | 60.0% | — | Other half was 40.0% |
| Profit from continuing operations | $290.0m | $103.0m | +$187.0m |
Source: annolyse.ai/briefings/mcy-fy24
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.