All tax administrations seek to maximize the overall level of compliance with tax laws. Compliance improvement plans (CIPs) are a valuable tool for increasing taxpayers’ compliance and boosting tax revenue. This note is intended to help tax administrations develop a CIP, by providing guidance on the following issues: (1) how to identify and rate compliance risks; (2) how to treat risks to achieve the best possible outcome; and (3) how to measure the impacts that treatments have had on compliance outcomes.

This report is the ninth edition of the OECD's Tax Administration Series. It provides internationally comparative data on aspects of tax systems and their administration in 59 advanced and emerging economies.

Armenia has committed to the adoption of the OECD’s Crypto-Asset Reporting Framework. To give effect it will need to enact legislation. An eight-step roadmap for implementation was developed. It sets out each activity, assigns responsibilities and sets timelines.

This FAD mission reviewed recent progress to improve tax administration and identified areas of priority tax administration modernization for 2019–23. The MEF has been implementing the RMS, a major component of which is the strengthening of the administration of the GDT. As the RMS ends in 2018, the MEF is now developing the next phase of reforms to strengthen the revenue system of Cambodia over the period 2019 to 2023. The GDT has made significant progress with implementing the RMS measures under its responsibility, and achieved extremely positive revenue growth and collections. The GDT has completed 71 out of the 86 RMS tax administration measures; the remaining 15 are under active progress. Since 2012, the GDT has routinely exceeded its revenue targets, and year-on-year revenue growth has far exceeded the annual levels of economic growth. Cambodia’s 2017 tax-to-GDP ratio of 17.2 percent is now comparable with many regional countries.

This report looks at effective e-service provision by tax administrations, summarising eight critical areas, and explores big data management and portals, as well as natural systems. It highlights key opportunities, looking at how these emerging technologies can be best used by tax administrations.

Russia’s war in Ukraine continues to bring a rising economic, social, and humanitarian toll. The attacks on the energy infrastructure have inflicted severe economic damage and losses, and the outlook remains highly uncertain. The war is expected to continue through the coming year, generating expenditure pressures and opening additional financing needs. In addition to the longer war, several other recent developments carry important implications for the IMF-supported program: first, a package of tax measures awaits adoption by Parliament, after which the authorities must continue to build on this effort with further broad-based measures to support fiscal sustainability; second, the successful Eurobond exchange in August is a major achievement toward restoring debt sustainability and securing debt relief amid pressing expenditure needs; and finally, the G7’s assurance to provide US$50 billion of stable, multi-year financing to Ukraine through Extraordinary Revenue Acceleration Loans for Ukraine (ERA) initiative is critical for meeting the now larger financing needs.

This paper addresses core challenges that all tax administrations face in dealing with noncompliance—which are now receiving renewed attention. Long a priority in developing countries, assuring strong compliance has acquired greater priority in countries facing intensified revenue needs, and is critical for fairness and statebuilding. Series: Policy Papers

To relieve the pressure on the outdated international corporate tax system, an ambitious reform was agreed at the Inclusive Framework (IF) on Base Erosion and Profit Shifting in 2021, with now 138 jurisdictions joining. It complements previous efforts to mitigate profit shifting by addressing the challenges of the digitalization of the economy through a new allocation of taxing rights to market economies (Pillar 1) and tax competition through a global minimum corporate tax (Pillar 2). This paper concludes that the agreement makes the international tax system more robust to tax spillovers, better equipped to address digitalization, and modestly raises global tax revenues.