Press coverage of the IMF’s annual report on the UK economy in both the FT and Guardian chose to headline their comments about ‘refining’ fiscal rules. Those headlines might have been interpreted as saying the IMF thought Reeves could raise spending without raising taxes. If you thought that then you would have been disappointed. Nothing the Fund said does that. The Fund effectively endorsed the current fiscal rules, which for reasons I will discuss below is a little disappointing coming from one of the few institutions that has expertise on these matters. But for those wanting higher public spending (which is most voters), their message is one I would agree with: its tax, not the fiscal rules, that has to change.
What they do comment on is how what happened in March might be avoided in the future. Reeves has sensibly committed to just having a tax changing budget in the Autumn, but the OBR is legally obliged to do two forecasts a year. Unfortunately, Reeves and the Treasury believe that each forecast has to show the government meeting its fiscal rules. After the Autumn budget those rules were only just met, so that meant that the OBR’s March forecast had a good chance of showing the government breaking its rules. Reeves decided, wrongly in my view, to make disability payments the residual item of spending that would adjust to make sure the rules held.
Singling out any one item of public spending to be the residual to be adjusted to ensure your rules hold in the OBR’s March forecast is a daft way to make fiscal decisions. Furthermore, adjusting spending or tax on a six monthly basis to get a fiscal forecast to hit a target is unnecessary. I noted at the time Charlie Bean (ex BoE, MPC and OBR) saying that a grown up approach would just promise to adjust policy in the Autumn budget to meet the fiscal rules, but following the Truss debacle politicians and civil servants were so scared of the bond market this didn’t happen.
The IMF mentions some ways of avoiding what happened in March happening again. I can interpret them as involving three possibilities. The first is to formalise this grown up policy. The OBR could still produce two forecasts each year, but in March they would omit their final chapter on assessing whether the fiscal rules were met. Instead the Chancellor would simply commit to making the necessary policy adjustments in the Autumn. The second option is to get the OBR to forecast just once a year, to coincide with the Autumn budget. A third possibility mentioned by the IMF involves “de-emphasizing point estimates of headroom in OBR assessments of rule compliance”.
The second option, the OBR producing just one forecast a year, is the one favoured by The Institute for Government (see Gemma Tetlow here). I have no problem with this, because issues involving fiscal sustainability are about the long term, not short term. I find the media’s discussion of monthly deficit numbers alternatively funny and exasperating. However the Treasury might want a six month OBR forecast to at least frame the pre-budget discussions. While plenty of other macro forecasts exist, the OBR’s detailed analysis of the public finance data is unique. It would be politically impossible for the OBR to do a forecast for the Treasury in secret.
I’m also not sure how de-emphasizing point estimates would work, because they could always be derived even if the OBR hid them. As Gemma Tetlow points out, the Bank has done this for some time and everyone still focuses on the point forecast. Saying that the fiscal rules would be formally met if there was a 40%, rather than 50%, chance of hitting the targets would rightly be seen as a major change in the ruIes.
I still think a viable option is to formalise the grown-up policy, because at some stage politicians and the Treasury need to start treating the bond market as grown-up too. (The media, I fear, never will.) By March next year Reeves should feel she has established enough credibility to be able to say that she would make the adjustments needed to meet the fiscal rules in the Autumn, without fear of spooking the bond market. To be honest I don’t think the bond market would have been spooked even if she had done this last March.
The two issues that I was disappointed the IMF didn’t comment on are the supplementary fiscal rules, and the change to a three year horizon.
The main fiscal rule, and the one driving policy at the moment, is the ‘golden rule’, which says current spending must be matched by taxes at some date in the future. The IMF rightly says that this rule “helps preserve space for investment”, which is one reason why it is a good fiscal rule. But there are two supplementary rules: a rule for welfare spending and a rule saying the debt to GDP ratio must be falling at some date in the future. In my view both are a waste of time.
Yet the IMF says that the falling debt to GDP rule “safeguards fiscal sustainability”, implying that the golden rule alone fails to do that. By fiscal sustainability they mean that debt to GDP remains stable or falling in the longer term. This is just incorrect, as the IMF must know. Getting debt to GDP to be falling in a few years time does not ensure sustainability. It is quite possible for the rule to be continuously met and yet for debt to GDP to rise steadily, because current increases more than offset any expected future falls.
As I have argued consistently (and to my knowledge no one has established otherwise) the golden rule is the best we can do to ensure sustainability, as long as taxes matching spending is defined sufficiently to allow space for an average level of investment spending. Periods of unusually high public investment never threaten fiscal sustainability. The falling debt to GDP rule therefore adds nothing useful. Yet what it does do, if it happens to bind when the golden rule doesn’t, is encourage governments to cut back on useful investment. It therefore partially negates a key advantage of the golden rule.
Putting the same point another way, any rule that looks at government debt is just looking at one side of the balance sheet by ignoring government assets. It is like saying that when you take out a mortgage on a house your financial position has reached crisis point because your debt level has exploded. If instead you required the GDP share of public sector net wealth to fall over time, you can formally show that this is simply double counting the golden rule. Again, you don’t need a supplementary rule.
The IMF does note that the fiscal rules are changing from looking five years ahead to instead look just three years ahead. All the IMF say about this is that this change is “expected to make the rules more credible, while allowing time to adjust gradually to shocks.” I agree that the Treasury expects this three year horizon to be more credible, but the IMF ignores the basic problem in moving from five to three years ahead, and that is the business cycle.
The current deficit target in the golden rule is not cyclically adjusted. This is potentially a problem because in economic downturns the deficit rises and vice versa. However as long as the fiscal rules looked five years ahead, this cyclicality was never going to be a problem, because the OBR would always be forecasting a return to trend output after five years. But that is no longer true if the target is just three years ahead.
You don’t need a full blown recession for this to become a problem. For example, at the moment the OBR is forecasting steady growth from 2026 onwards. But supposing Trump’s tariffs or other factors depress the global economy in 2026, and this is expected to continue into 2027. This impacts the UK, such that the OBR forecasts made in the Autumn of 2026 show the UK economy still 1% below trend in 2029. In 2026 the fiscal rules will apply three years ahead, which is 2029.
That may well mean that the current balance will not be expected to be at target in 2029, but will be by 2031. To cut spending or raise taxes in those circumstances, just before an election, would be crazy from both an economic and political point of view.
Did the Treasury not think about this possibility? If they did, why did Reeves still take this risk? One of the features of fiscal rules under the Conservatives was endless tinkering for short term political gain at the expense of economic logic, and unfortunately the change from a 5 year to a 3 year horizon is I believe another example. To be quite frank, I just wished they had asked me about this change before they did it. [1]
The scenario above might not happen of course, or it may happen at some other time in the future. But that it might well happen means this rule change is another example of Reeves erecting hurdles that she might fall over in the future. Labour’s tax pledges are the biggest of course, but at least there was a political justification for those. Changing the target horizon from five to three years has no such excuse. The bond markets were never going to be spooked by her October budget with its small adjustment to the falling debt to GDP rule, so she didn’t need to throw them a bone, particularly one they have no interest in. [2]
[1] If that sounds pompous, I am one of the very few in the UK who has written an academic paper about both the theory and practical issues behind fiscal rules.The paper recommends using the golden rule, with a target five years ahead. I advised the previous Labour Chancellor but one to adopt this rule, advice he accepted. Even if the current Chancellor was determined to make this change to ‘enhance credibility’, I would have pointed out that it should have involved moving to a cyclically adjusted target for the current deficit.
[2] Bond markets don’t really care about the details of fiscal rules anyway. Just look at the number of times the last government changed those rules, none of which produced any reaction from the markets. As I set out here, markets are mainly interested in where the central bank will set interest rates in the future, and how uncertain those expectations are.