Mercury's 228.5% NPAT surge hid a 17.7% EBITDAF slide and rising leverage

Revenue fell 7.5% to $873.0m and EBITDAF fell 17.7% to $242.0m from $294.0m, reflecting weaker hydro generation, consistent with the FY22 EBITDAF guidance cut from $590m to $570m on an expected 150 GWh drop in hydro output from dry weather. Yet PBT rose 171.1% to $450.0m and NPAT rose 228.5% to $427.0m, driven by an effective tax rate that fell to 5.1% from 21.7% prior period, an unprecedented low against a 24.8%-30.2% four-period range.

Net debt/EBITDA rose to 6.68x, unprecedented high versus a 4.41x historical mean, with gross borrowings of $1.7b. Operating cash flow fell to $132.0m from $163.0m, and cash conversion softened to 54.5% from 55.4%, sitting at the lower edge of Mercury's historical range.

PBT growth of 171.1% is the cleaner read than NPAT's 228.5% because tax swings do not reflect operating economics, but even PBT surged while EBITDAF, the sector's primary operating measure, fell 17.7%. This matters because anyone reading the NPAT or PBT headline alone would conclude operations improved, when generation and margin actually weakened.

Leverage is now historically elevated. Net debt/EBITDA of 6.68x is unprecedented high against a 4.41x historical mean, and because EBITDAF itself shrank, the leverage increase compounds rather than offsets the earnings decline. This reduces financial flexibility for funding growth or maintaining the dividend from operating cash rather than the balance sheet.

Cash conversion and dividend cover diverge from reported profit. Operating cash flow fell to $132.0m from $163.0m and cash conversion sits at the lower edge of the historical range at 54.5%. The interim dividend rose to 8.0 cents from 6.8 cents, but the payout ratio against NPAT fell to 25.5% from 70.8%, a shift that is largely an artefact of the tax-inflated NPAT denominator rather than materially stronger cash cover.

With first-half EBITDAF at $242.0m, down 17.7%, the guided figure implies roughly $328m of second-half EBITDAF is needed, a recovery from dry-weather-driven hydro softness that management has not yet fully evidenced. Without segment or hydrology detail on the release, it is not possible to judge how much of that gap closes from generation recovery versus retail or trading contributions.

The bulk of the profit growth traces to a historically unprecedented low tax rate (5.1% versus 21.7% prior) rather than to stronger underlying generation or retail economics, which the 17.7% EBITDAF decline and 7.5% revenue decline actually show weakening. Operating cash flow fell to $132.0m and cash conversion sits at the lower edge of Mercury's historical range, while net debt/EBITDA of 6.68x is unprecedented high, meaning the period's earnings expansion was not accompanied by comparable cash generation or balance-sheet strengthening. Together this points to a result flattered by tax and non-operating effects rather than one built on repeatable operating improvement.

This briefing cannot assess capex intensity or free cash flow coverage of the dividend because current-period capex figures were suppressed pending source verification.