Mekorot and the New Regulatory Model: How the NIS 1.367 Billion Impairment Was Built
The main article treated the impairment as part of the thesis. This follow-up dissects the mechanics: which rule changes pushed the recoverable amount down to NIS 18.612 billion, why the disclosed scenario weights do not match between the valuation note and the auditor's key-matter note, and why the booked loss still excludes the next development cycle.
The main article argued that the new regulatory regime cracked Mekorot's equity without buying it more funding room. This follow-up isolates the calculation engine behind that claim: how the NIS 1.367 billion impairment was built, which regulatory assumptions went directly into the DCF, and why the economic picture is still not complete even after the accounting hit.
This matters because it is easy to read the number as just another valuation dispute. That misses the point. The model does not start with weaker water demand or with an operational failure in the asset base. It starts with the idea that the amended water rules changed the return formula, the recognition of development spending, the debt-coverage benchmark, and the split of recognized income. Once the recognized cash flows change, the recoverable amount of the existing asset base changes with them.
This is not an impairment on demand. It is an impairment on the rules of the game.
How The Impairment Was Built
The impairment was not built from a market multiple, and not from a vague market-value haircut. Mekorot measured the recoverable amount of its fixed assets as value in use, meaning discounted cash flow from the water-supply activity plus other activities that are tightly linked to it. That is where the number comes from.
| Item | What the model says |
|---|---|
| Carrying amount before impairment testing | NIS 19.979 billion |
| Weighted recoverable amount | NIS 18.612 billion |
| Recorded impairment | NIS 1.367 billion |
| Valuation method | Value in use through discounted cash flow |
| Real post-tax discount rate | 3.49% |
| Pre-tax discount rate | 4.28% |
| Water-volume growth | 1.8% through 2031, then 0% |
| Growth in other activity | 0% in real terms from 2026 onward |
That is the critical distinction. The 2025 write-down does not say the assets stopped working. It says the cash flows those assets are expected to generate under the new rules no longer justify the value at which they were carried through year-end 2025.
There is also an important waypoint before the signed number. In December 2025, before the financial statements were finalized, the joint adviser to the Government Companies Authority and the Water Authority had already estimated that the rules in their then-current form could require an impairment review that might lead to a write-down of about NIS 1.95 billion. The audited number later came down to NIS 1.367 billion, but the direction did not reverse. The argument was about depth, not about whether damage existed.
Which Rule Changes Pushed Value Down
The impairment did not come from one clause. It came from several regulatory changes layered on top of one another, each weakening the cash-flow profile in a different way.
| Regulatory change | What the rules say | Why it matters to the model |
|---|---|---|
| Return on capital | Assets recognized from January 1, 2026 earn the recognized annual interest rate; older assets earn the higher of recognized interest plus spread or 5.5% | This goes directly to the allowed return on the existing asset base, so it goes directly into the DCF |
| Normative margin on Mekorot activity | A new margin mechanism was added | Mekorot says it is not expected to be recognized in coming years because of the offset mechanism, so the headline mechanism does not yet translate into near-term cash-flow relief |
| FFO to debt mechanism | The rules add a normative 8% mechanism | The company says this ratio does not match the actual numbers in the financial statements and does not match its own method of calculation |
| Shift to a normative development price list | Project recognition moves from actual project-specific costs to a fixed list | That moves execution and overrun risk into a more dangerous place for the economics of future development |
| Change in recognized income | 50% of profit before tax becomes part of recognized income | As the company's share in recognized income rises, the tariff's share in funding costs falls |
| Cost-recognition updates | Energy, collection-loss, O&M, wage and cyber recognition were updated | Mekorot says that, in most components, the updates still do not cover the full cost base |
This is also why the additions inside the amended rules did not eliminate the impairment. The Water Authority argued that the rules were updated to improve recognition of energy, municipal taxes, maintenance, wages, and cyber costs, and that they should support the company's financial stability. Mekorot does not deny that some items were adjusted. It states explicitly that, in most of those components, the updates still do not cover the full cost. In other words, some positive adjustments were added, but they did not reverse the net result of the model.
There is a deeper dispute here about the right resilience benchmark. The company notes that the 8% FFO-to-debt mechanism does not match the Financial Resilience Team's targets under Government Decision 4514, which set 9% for 2026 and 10% for 2030. That matters because if the real resilience benchmark is higher, then a mechanism that looks "debt supportive" on paper may still be too weak for Mekorot's actual financing economics.
Two Scenarios, One Number, And One Unresolved Disclosure Gap
The valuation rests on two different scenarios. That is the heart of the model, because the final impairment is a weighted result of both.
Scenario A stretches across 33 years. Its first seven years assume no full coverage of operating costs, and after that it assumes full operating-cost coverage, but the profit or return-on-capital component under the new rules does not change across the whole remaining life of the existing assets. In model terms, that pushes full coverage all the way out to the end of 2058.
Scenario B is much shorter. It also assumes seven years under the new rules without full coverage, but then assumes a return to full coverage from December 31, 2032.
The implication is straightforward. One scenario describes a very long structural problem. The other describes a long bridge period, but still a bridge. That means the weighting between them is not a technical footnote. It is part of the final number.
And this is where the sharpest disclosure problem in the whole package appears:
| Disclosure source | Scenario A weight | Scenario B weight | Why it matters |
|---|---|---|---|
| Valuation disclosure | 60% | 40% | Pushes the result more toward the longer and harsher scenario |
| EY key audit matter | 50% | 50% | Describes the same two scenarios, but with equal weighting |
That is not cosmetic. When the same set of financial statements gives two different weights for the same two scenarios, the reader can no longer reconstruct precisely how the final number was calibrated. The direction is clear. The exact tuning is not.
The contradiction stands out even more because the auditor says its work focused precisely on the discount rate and on the timing of the return to full coverage under each scenario. These are not secondary inputs. They are the keys to the entire model.
Mekorot adds one more sharp point here: from its perspective, the IAS 36 impairment review is a mandatory accounting exercise, not a discretionary management choice. Beyond that, the company states that the effect of the new regime must be measured against the previous rules, not against a simple year-by-year comparison or against the claim that some individual lines improved. That matters. If the benchmark is the prior regulatory regime, then partial improvements in a few cost lines do not erase a cumulative hit to return and development economics.
What The NIS 1.367 Billion Does Not Include
The most important point in the entire package may sit outside the recorded number rather than inside it. Mekorot states explicitly that the impairment test does not include expected development costs, even though the Water Authority approved annual development of about NIS 1.6 billion.
That is a dramatic disclosure. It means the booked write-down is about the existing asset base, not the full bill of the new regime. If those development programs are actually executed under the same normative price list and the same return formula, the company itself says additional losses may arise and future net income may fall materially.
In other words, NIS 1.367 billion is not necessarily the ceiling of the damage. It may only be the price attached to the old inventory of assets.
That is also why the March 29, 2026 petition to the High Court should not be read as an external legal side story. It sits inside the same logic as the model. Mekorot argues that the new rules bypass the resilience-setting mechanism under Government Decision 4514 and may damage the rating, the cost of funding, and the ability to finance development programs that the regulator itself already approved. This is not only a legal claim. It is a claim that the same regime that cuts the value of the existing assets also threatens the economics of the next assets to be built.
Bottom Line
A forensic reading of the impairment leads to three conclusions.
First, the NIS 1.367 billion write-down was created inside the new regulatory model itself. It does not reflect idle plants or falling demand. It reflects lower permitted cash flow on the existing asset base under a new ruleset.
Second, even the signed number rests on a model that the disclosures describe inconsistently. The valuation note gives a 60% to 40% split. The key audit matter gives 50% to 50%. When the entire difference between the scenarios is how long the pain lasts, that is a material gap.
Third, the recorded number still excludes the future development layer. As long as the amended rules remain in place and the company keeps investing around NIS 1.6 billion a year in approved development, the 2025 impairment may look less like a one-off event and more like the entry price into a new regime.
So the right question from here is not whether NIS 1.367 billion is large. It obviously is. The real question is whether 2026 brings a regulatory correction that narrows the gap between normative resilience and actual economics, or whether it simply confirms that the 2025 impairment was the first number in a longer sequence.
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