The financial crisis and the recession it induced have wrought havoc with our understanding and decisionmaking on the medium-term fiscal position. The crisis will leave us with a higher debt stock and a lower level of sustainable output, and both of these will have implications for the optimal paths for spending and for taxes. If sustainable output has changed then spending plans need to be revised, even if there is no excessive accumulation of debt. If debt has been accumulated in excess of that seen as wise before the crisis, then a plan must be in place to raise taxes and reduce spending in order to return to (or towards) a desired level of debt, even if sustainable output has not been affected. In addition to adjustments in response to changes in trend output and in the debt stock, there may also be a need for an adjustment in response to any structural deficit that existed before the crisis broke.We base our analysis on the forecast discussed in Kirby et al. (2010) in this Review. We divide our discussion into spending, taxes and debt, as decisions need to be made for each, but there are three separable problems that these decisions must address. If all we have seen is a transitory shock to sustainable output then the case for real spending cuts and a smaller government sector before interest payments is weak to non-existent. If all we have seen is a shock to sustainable output then the case for reducing real spending as a share of GDP and hence reducing the share of the government in output is also weak, but a case can be made for small reductions in real spending. If all we have seen is a large rise in the debt stock then the interest on that debt needs servicing, and some debt repaying, and hence the optimal decision for the Government would require both higher taxes and lower real spending in about equal proportions, if decisions had been taken such that the marginal benefits from higher spending were just equal to the marginal costs of higher taxes. This is in part a political choice, and a new administration might want to cut spending independently of the impacts of the recent crisis. If we had a structural deficit before the crisis and spending plans were optimal this would suggest that taxes were too low. Overall we would argue that the case for higher taxes is much stronger in the current situation than the case for lower real spending as a per cent of GDP. Evidence from the 1970s and 1980s suggested that fiscal consolidation on the scale we discuss was better done by cutting spending. Larch and Turrini (2008) look at more recent efforts, and suggest that this result reflected picking the low hanging fruit, and that a more balanced approach based on a strong fiscal framework would now be more appropriate.Given the increased debt stock, there is continual worry about the possibility that a risk premium will arise on UK government debt, and on UK debt in general, and that these would have a deleterious effect on prospects for the economy. If such a premium arises, then government interest payments a...