The Number They'll Say, and the One They Won't
Robert Jenrick stood on a stage in Birmingham and promised to be careful. Reform UK, he told the conference, would cut £80bn of public spending within five years, and would do it "in a careful way, not a cack-handed way." He wants tax cuts too, starting with a personal allowance of £15,000, up from £12,570, and he wants the markets onside before he touches either lever. He even name-checked Liz Truss, approvingly, as the cautionary tale: she went into "a sweetie shop, took everything off the shelves and stuck it into a budget," and the markets punished her for it. Fair enough. The trouble is that Jenrick's own plan is the same shop, with better lighting.
Here is what £80bn actually consists of, according to the party: welfare, net zero policy, overseas aid, and a smaller civil service. That's the whole list. No departmental breakdown, no figure for how many civil service jobs or in which building. The BBC reported the pledge in September with exactly that gap in it — the numbers, not the sectors.
It is not new for this party. In its 2024 manifesto, Reform costed £70bn of tax cuts against £70bn of savings that Tax Policy Associates found had been miscalculated by at least £18bn, partly through an overstated change to Bank of England reserve rules that would, in practice, have landed on businesses and consumers rather than banks. By November 2025 Farage had dropped the £90bn commitment entirely, conceding it wasn't realistic. Ten months later, Jenrick is back with a smaller allowance and a bigger cut, and the same missing page.
The Institute for Fiscal Studies has already told us what that missing page probably contains. Responding to Farage's May 2025 speech, IFS deputy director Helen Miller put it as plainly as anyone in that building ever does: this is "a vision of the state" involving "much lower taxes, paid for with large, unspecified cuts to public services that would go far beyond a crackdown on waste." Scrapping net zero, she noted, is a phrase doing an enormous amount of work for something with no definition attached. You cannot audit a plan that hasn't been written down. You can only audit the sentence describing it, and the sentence keeps changing.
The case for the allowance rise deserves a fair hearing before any of that. A worker on £15,000 or £25,000 keeps more of every payslip, immediately, without waiting on a growth forecast to arrive. Reform's argument is that this money gets spent rather than saved, that spending drives VAT receipts, and that a leaner state — fewer civil servants, less overseas aid, no green subsidy — is simply a less wasteful one than a smaller safety net. It's a coherent position. Plenty of economists take some version of it seriously.
It runs into a specific problem, though, which is who actually receives the giveaway. Tax Policy Associates modelled the 2024 manifesto and found that most of the benefit from Reform's tax cuts flows to higher-income individuals, who have a lower propensity to spend than the low earners the policy is pitched at. Raising the personal allowance helps you in proportion to how much of your income sits above it — the higher your salary climbs before you hit the higher-rate band, the more of the giveaway you bank rather than spend. A worker on £15,000 gains from the rise but stays below the current threshold anyway, so the change does very little for anyone already outside the tax system. The stimulus case for the cut and the fairness case for it are, on the evidence, arguing against each other.
Set that against the ledger nobody publishes: what £80bn of unnamed cuts costs in services nobody has priced. A council care worker doesn't know yet whether the welfare cut lands on the benefit she administers or one she claims herself. A civil servant in a job centre doesn't know whether "reducing the number of civil servants" means her office or somebody else's. These aren't abstractions withheld out of tact. They're withheld because naming them means naming a fight, and no party fights a fight before an election it can avoid fighting after one.
That is the question this masthead exists to ask. Jenrick is not a chancellor. He's an economic spokesman for a party that hasn't formed a government, promising a specific and dated number on the giveaway side of the ledger and a category on the cost side. If Reform wins power, the £80bn won't be decided by Jenrick on a conference stage. It will be decided in a spending review, department by department, by officials and ministers working from a Treasury baseline nobody in Birmingham this week has published — the same machinery, the same discount rates, the same unaccountable process this column spends every week describing. Truss found out in nine days what happens when the market prices an unfunded promise before the detail exists. Jenrick has read the lesson and drawn the only conclusion his position allows: keep the number people can hear, and hold back the one they'd vote against.