Policy Brief
October 2026

Fiscal Rules and Long-Term Inclusive Growth

Fiscal Responsibility. Public Investment

Key messages

1. Defining fiscal responsibility primarily through deficit and debt targets can be self-defeating. Cutting spending in a weak economy reduces growth and investment and can leave the ratio of debt to gross domestic product (GDP) higher, not lower.

2. Fiscal rules shape these outcomes. When governments must meet deficit, debt or expenditure targets, public investment is often cut first. Short forecast horizons compound this problem by recording investment costs before the returns emerge.

3. What public money does matters. Investment in infrastructure, technology and innovation builds productive capacity, but so does spending on health, education, care, skills and social protection. Fiscal frameworks need to protect both.

4. How the fiscal position is measured also matters. Debt measures record what the state owes but not necessarily the assets it creates through spending. Public sector balance sheets and net worth offer a fuller picture, while investments should be assessed over the full period in which they generate returns.

5. Countries do not face the same fiscal constraints. Access to foreign exchange and the currencies in which governments borrow, exposure to volatile capital flows and the structure of the international financial system all shape fiscal space. The same fiscal rule can therefore have very different consequences across countries.

6. Governments can improve fiscal frameworks now. They can protect essential and productive spending through the business cycle; account for public assets and longer-term investment returns; steer investment through procurement and public finance; raise revenue fairly; and reduce exposure to volatile external finance.

7. Domestic reform is not enough where the binding constraint is external. International rules must provide greater space for productive investment through better-designed lending programmes and debt sustainability assessments, reliable access to liquidity, earlier debt resolution, long-term public development finance and stronger international tax cooperation.

8. Stability when shocks hit also depends on global and regional cooperation. Buffer stocks and coordinated stabilisation measures can reduce price shocks before they reach national budgets, preserving fiscal space.

9. Fiscal responsibility should ultimately be judged by whether public finances strengthen the economy’s capacity to grow, withstand shocks and meet public obligations over time, not by whether a single fiscal number falls in the short term.

Overview

Governments must be able to meet their obligations over time, and the credibility of public finances affects borrowing costs across the economy. This brief asks whether defining fiscal responsibility primarily as reducing deficits and debt serves that objective. It examines five myths about fiscal policy and shows how they became embedded in the rules used to assess and constrain public finances.

The brief sets out what governments can do now: protect essential and productive spending through the economic cycle, measure what the state owns as well as what it owes, invest with direction, align the fiscal framework with the growth strategy, and manage the external constraint. It also sets out the changes to international rules that countries cannot make alone, on lending programmes, liquidity, debt resolution and tax cooperation.

It draws on evidence from Greece, the United Kingdom, Brazil, Mexico and Spain.

The inquiry behind this brief

This is one of the eight areas of the Council’s inquiry.

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PDF · 2.1 MB · 24 pages
PUBLISHED
October 2026
CONTENT TYPE
Policy Brief
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