Tonga: GDP deflator (base year varies by country)

Key figures

What the numbers say

In 2025, Tonga's GDP deflator (base year varies by country) rose 3% on 2024 (from 146.14 to 150.46).

Across the 30 yearly changes before that (1995 to 2024), the average change was +4.9% and a typical year strayed about 4.3% from that (the standard deviation). This year's change was 0.5 standard deviations below that average, so it was an ordinary year: it sits within the range of normal year-to-year movement.

On record, the biggest yearly rise was 28.6% in 1994 and the biggest yearly fall was 3.4% in 1995. The numbers show how large and when, not why; for the cause, look at what happened in that country in those years.

From 2016 to 2025 the straight-line trend is upward, about 6.13 a year. A straight line explains 96% of the movement over 10 observed years.

Worked out from the yearly values above. How the checks work: standard deviation, z-scores and straight-line trends.

How it compares

In 2025, Tonga had the 73rd highest value of the 186 economies reporting that year. Higher is not always better: for some indicators the lowest value is the one to aim for. See the full ranking.

Closest to Tonga in the 2025 ranking

• Kenya — 69th of 186: 154.1
• Kosovo — 70th of 186: 153.46
• Poland — 71st of 186: 151.56
• Mauritania — 73rd of 186: 150.07
• Guatemala — 74th of 186: 148.5
• Dominican Republic — 75th of 186: 147.88

What this measures

The GDP implicit deflator is the ratio of GDP in current local currency to GDP in constant local currency. The base year varies by country. This indicator is expressed as a ratio (a÷b).

All 45 values

GDP deflator (base year varies by country) in nearby economies

• American Samoa — 135.04 (2022)
• Australia — 102.31 (2025)
• Brunei Darussalam — 99.24 (2025)
• Cambodia — 128.49 (2025)
• China — 104.18 (2025)
• Fiji — 113.15 (2025)
• French Polynesia — 121.97 (2024)
• Guam — 127.49 (2022)
• Hong Kong SAR, China — 105.23 (2025)
• Indonesia — 175.41 (2025)

More financial sector data for Tonga

• DEC alternative conversion factor (LCU per US$) — US$2.4 (2025)
• Official exchange rate (LCU per US$, period average) — US$2.41 (2025)
• Domestic credit to private sector by banks (% of GDP) — 33.85% (2025)
• Monetary sector credit to private sector (% of GDP) — 34.11% (2025)
• Consumer price index (2010 = 100) — 174.32 (2025)
• Domestic credit to private sector (% of GDP) — 34.11% (2025)
• Inflation, consumer prices (annual % growth) — 5.59% (2025)
• Inflation, GDP deflator (annual % growth) — 2.96% (2025)
• Net domestic credit (current LCU) — 280.57 million (2025)
• Net foreign assets (current LCU)

Reading data like this

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Questions people ask

What is Tonga's GDP deflator (base year varies by country)?

150.46 in 2025, according to the World Bank (World Development Indicators).

How has it changed since 1981?

It is up 1,388% from 10.11 in 1981 (6.33% a year on average, compounded). The highest value was 150.46 in 2025 and the lowest 10.11 in 1981.

How does Tonga rank?

73rd highest of 186 economies with data for 2025.

Is the latest change in GDP deflator (base year varies by country) unusual for Tonga?

In 2025, Tonga's GDP deflator (base year varies by country) rose 3% on 2024 (from 146.14 to 150.46). Across the 30 yearly changes before that (1995 to 2024), the average change was +4.9% and a typical year strayed about 4.3% from that (the standard deviation). This year's change was 0.5 standard deviations below that average, so it was an ordinary year: it sits within the range of normal year-to-year movement.

Source

World Bank, World Development Indicators, indicator NY.GDP.DEFL.ZS, licensed CC BY 4.0. Original source: Country official statistics, National Statistical Organizations and/or Central Banks; National Accounts data files, Organisation for Economic Co-operation and Development (OECD); Staff estimates, World Bank (WB) Figures are fetched from the World Bank API and refreshed monthly; see the series on data.worldbank.org. The full definition and method are in the World Bank's metadata glossary. Comparisons use the same World Bank release.

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