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9 67th National Conference and Annual Dinner 1 (2004)

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PAPER

Fundamental Tax Reform:

The Experience of OECD Countries

By
Jeffrey Owens, Director
The Centre for Tax Policy and Administration, OECD Paris
Trends in OECD Tax Systems

1 Introduction
Since the mid-1980s all OECD countries
have engaged in fundamental reforms of their
tax systems. These reforms have been driven
by the need to provide a more competitive
fiscal environment: one which encourages
investment, risk-taking and entrepreneurship,
and which provides increased work incentives.
At the same time, governments are aware of
the need to maintain taxpayers' faith in the
integrity of their tax systems. Fairness and
simplicity have become the bywords of
reformers. Fairness requires that taxpayers in
similar circumstances pay similar amounts of
tax. Simplicity requires that paying your taxes
becomes as painless as possible (not some-
thing easily achieved in modern societies) and
that the administrative and compliance costs
of collecting taxes are kept at a minimum.
Almost all the tax reforms of the last two
decades can be characterized as rate reducing
and base broadening reforms, following the
lead given by the United Kingdom in 1984
and the United States in 1986. In the mid-
1980s, most OECD countries had top
marginal income tax rates in excess of 65 per
cent. Today it is rare to find top rates above
50 per cent and most OECD countries find
themselves around or below 40 per cent.
Similarly, top statutory corporate income tax

rates were rarely less than 45 per cent, while
today most are below 35 per cent and an
increasing number fall below 25 per cent.
These reforms, however, did not, until
recently, lead to a fall in the overall tax burden
(measured by the tax-to-GDP ratio). From
1975 to 2000, most OECD countries
experienced an increase in this ratio. Some,
like Finland and France, saw the tax burden
increase by almost a third. A small number of
countries - notably the United Kingdom
and the United States - experienced a stable
tax burden. It does appear, however, that this
long-term upward trend peaked in 2000 and
the latest figures available to the OECD
suggest that most countries are now below the
peak 2000 level.
This paper provides a brief summary of
major tax reforms, both in policy and admin-
istration, in OECD countries, with particular
emphasis on changes since the year 2000.
Section 2 documents the general trend of
reductions in both tax revenues and rates.
Section 3 examines the diversity in tax
policies across OECD countries, reflecting the
diversity in both economic circumstances and
policy objectives. Section 4 deals with
developments in tax administration. Finally,
section 5 looks at some of the challenges for

DRAFT: November 2004, Number 47

The views expressed in this paper do not necessarily reflect the views of the OECD Member countries, although
the reports upon which the paper is based have been approved by all 30 OECD countries. This paper has been
prepared in collaboration with the Staff of the CTPA and has benefited from comments by colleagues in other
parts of the OECD.

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