The Treasury's mini-budget estimates are incorrect.

Without factoring in the cost of the energy price cap, the Treasury predicts that the mini-Budget will cost the exchequer £45 billion annually. Almost sure, this is too high. In-depth calculations performed by Cebr on the effects of lowering the higher rate tax and the cost of tax-free shopping indicate that in around five years, revenues will increase rather than decrease. The Treasury's anticipated cost appears to be extremely high for a number of other policies, such as the cost of lowering the corporation tax. But even with additional growth, we predict that today's actions will cost around £25 billion.

Are we now doing enough to avoid a recession, and can we pay the bill?

These two questions have "probably not" and "maybe" as my responses. According to our simulations, the pound will decline (by about 3% on the trade-weighted index) and interest rates will rise (up 60 basis points). These figures obviously have a very wide margin for error, and if the markets don't like what they see, they may actually be much higher. On the other hand, increased inflation and fiscal drag are generating a lot more tax income than usual, and both of these will eventually reduce borrowing, though more in 2024–2025 than in the current fiscal year. The expense of the gas price cap will have a significant impact. At the current market price, this would increase borrowing by around £70 billion in 2023–2024, however that amount may be significantly lower if, as we anticipate, the price declines.

Therefore, one danger is the increased borrowing, along with others such as the weakening of the pound and greater increases in interest rates than would otherwise be necessary. Bond and FX markets both experienced a negative early response.

On the other hand, I do anticipate that the measures will increase GDP by more than 2% by 2030, as well as investment, which may increase by more than 10% by that time, as well as employment and productivity. The problem is that according to the forecasts, the primary repercussions of these won't manifest themselves for at least 5 to 10 years. Little is expected to happen right away. The recession, which seems imminent in the short term, is unlikely to be prevented.

There are other further growth-enhancing measures that have been promised. To maintain confidence, it's crucial that things are communicated right away. Up until the advantages of their new strategy start to materialize, the administration and its backers are expected to experience a tough ride in the markets. They'll do well to maintain their composure.