Oxfam’s 2018 report Reward Work, Not Wealth estimated that the richest 1% received 82% of the increase in global wealth between Q2 2016 and Q2 2017. That means a share of wealth growth over one year—not that the richest 1% owned 82% of all wealth, and not a figure for wealth growth today.
What does the 82% figure mean?
Oxfam’s report, published on 22 January 2018, said that “82% of all wealth created in the last year went to the top 1%, and nothing went to the bottom 50%.” Its methodology defines that “last year” as the period from Q2 2016 to Q2 2017. The report’s table describes the result as the richest 1% accumulating 82% of the increase in global wealth in 2016–2017. Oxfam, Reward Work, Not Wealth
The distinction is between a flow and a stock: 82% is the richest 1%’s estimated share of the additional wealth recorded during that period. In the same methodology, Oxfam estimated that the top 1% held 50.1% of global wealth in Q2 2017. That is a share of wealth at a point in time, not the 82% growth figure. Oxfam methodology note
How did Oxfam arrive at the number?
Oxfam used Credit Suisse’s 2017 Global Wealth Databook, which compiled estimates of household wealth distribution across countries. The calculation compared wealth in Q2 2016 and Q2 2017. Oxfam adjusted the earlier period into 2017 dollars using the U.S. annual consumer price inflation rate, then calculated the change. Oxfam methodology note
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| Measure | Q2 2016, adjusted to 2017 dollars | Q2 2017 | Estimated increase |
|---|---|---|---|
| Total global wealth | $270.924 trillion | $280.289 trillion | $9.365 trillion |
| Wealth of richest 1% | $132.834 trillion | $140.509 trillion | $7.675 trillion |
Dividing the top 1%’s estimated $7.675 trillion increase by the total $9.365 trillion increase gives about 82%. These are wealth estimates expressed in U.S. dollars at market exchange rates, not a direct measure of cash income or wages. Oxfam methodology note
What data and assumptions shaped the estimate?
The 2017 Databook covered 2000–2017 and incorporated new historical sources, revising some earlier estimates. Oxfam notes revisions to United Nations population estimates and the addition of non-financial-asset data for China, India, Japan, and Russia. Those changes added $8 trillion to measured global wealth, distributed across the wealth groups. The figures therefore depend on the dataset version and can change when new information revises past estimates. Oxfam methodology note
Wealth estimates are affected by the quality and coverage of national balance sheets and surveys, asset valuations, and currency exchange rates. The 82% result should be read as Oxfam’s estimate under its named dataset and adjustments, rather than as a precise count of money transferred to individuals.
What did “nothing went to the bottom 50%” mean?
Oxfam’s comparison with the bottom half relied on estimates centered on adults. The underlying distribution data assumed children had no independent wealth. Oxfam then distributed children equally through the adult wealth distribution and assigned them the wealth of their parents or guardians. Its methodology says this approach is conservative because families tend to be larger in countries with lower household wealth. Oxfam methodology note
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That population adjustment is important when interpreting the report’s headline comparison. It is a modeling choice used to allocate children within the distribution; it does not mean Oxfam tracked every household’s income or found that no person in the bottom half experienced any financial gain.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Is the 82% statistic current?
No. It describes the 2016–2017 period and was published in 2018. Oxfam has since published analyses using different periods and, in some cases, different populations and measures. Those newer figures provide separate context; they do not update or recalculate the 82% estimate.
| Oxfam figure | What it measures | Period and publication |
|---|---|---|
| 82% of global wealth growth | Share of estimated wealth increase going to the richest 1% | Q2 2016–Q2 2017; published in 2018 |
| More than $33.9 trillion in real wealth growth | Wealth growth attributed to the richest 1% | Since 2015; Oxfam GB, 2025 |
| More than 16% rise to $18.3 trillion | Billionaire wealth, not the wealth of the entire top 1% | 2025; Oxfam GB’s January 2026 report |
Oxfam GB’s 2025 figure is a separate estimate of the richest 1%’s real wealth growth since 2015. Its January 2026 report, Resisting the Rule of the Rich: Protecting freedom from billionaire power, says billionaire wealth rose by more than 16% in 2025 to $18.3 trillion, an increase three times the average annual increase over the preceding five years. Neither figure is the same measure or period as the 2018 statistic. Oxfam GB, global inequality Oxfam GB, 2025 wealth-growth release
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