Zimbabwe’s miners have long leaned on a simple cushion: a bad year could be carried into a good one, with assessed losses banked against future profit until the books balanced. The 2026 budget takes most of that cushion away. Mining firms may now carry forward only 30% of their assessed losses, and any unused portion is forfeited rather than held over.

The change matters because mining is a business of long cycles and front-loaded pain. A new operation can spend years in the red — sinking shafts, building plant, absorbing commissioning costs — before sales turn the corner. The old rule let those early losses travel forward in full, sheltering later profit until the original outlay had effectively been earned back. Capping the carry-forward at 30%, with the balance lost, compresses that shelter sharply and brings tax forward into years a project might once have treated as recovery years.

The immediate effect is on cash and on the investment case. A miner modelling a Zimbabwean project now has to assume it will pay tax sooner, even while still working off start-up losses, which raises the effective cost of the early years and tightens the internal return. For marginal operations — small gold producers, lithium entrants still scaling, chrome and platinum projects near the edge of viability — that shift in timing can be the difference between proceeding and pausing. The detail of how the 30% is applied year to year is the kind of mechanics operators will want pinned down against the 2026 comprehensive tax guide before they re-run their numbers.

For the fiscus, the logic is revenue timing: pull receipts forward and shrink the long tail of deferred relief that large resource projects accumulate. For the operator, the takeaway is colder. A loss is no longer a fully bankable asset, and the early years of a Zimbabwean mine now cost more than the spreadsheet used to say.