Forty-five days after the quarter, INS publishes the first figure
Each row is a quarter, from Q1 2020 to Q2 2026. The dot shows how much GDP grew against the previous quarter, seasonally adjusted, according to the first estimate INS published, which it calls the "signal estimate".
The latest row, Q2 2026: 0.0%. GDP was flat against Q1 2026.
By the second provisional version, the figure changes little
INS publishes two provisional versions, about a month apart, the last about 100 days after the quarter. Between the first estimate and the last version, the median difference is 0.1 percentage points, in Q1 2020–Q4 2022 as well as from 2023 on (25 quarters). The largest difference: 0.8 points, in Q2 2023 (+0.9% → +1.7%).
In the current series, the values of the same quarters look different
In the last position, the chart shows the series INS published on 7 September 2026. Against the first figure, the median difference is 0.3 points for the quarters from 2023 to Q1 2026 and 1.2 points for Q1 2020–Q4 2022.
INS releases point to possible sources of revisions: new data (agricultural and annual data, for instance), the seasonal adjustment recalculated every quarter and, in 2024, a major revision of the national accounts. The data do not attribute each difference to a cause.
The largest revisions are from 2020–2022
Q2 2020, the quarter at the start of the pandemic: first figure −12.3%, current −8.2%. Q1 2022: +5.2% → +3.2%.
Six of the 12 quarters in Q1 2020–Q4 2022 were revised by at least one point. Among the 13 quarters since, none were.
Sometimes the sign reverses: a fall instead of growth
Q1 2024: first figure +0.5%, current −0.2%. Q2 2024: +0.1% → −0.5%. In the releases of the time, the values for the two quarters showed no fall; in the current series both are negative.
Two quarterly falls in a row are the usual yardstick for a "technical recession". It is no official dating. It shows how fragile the yardstick is when the falls are a few tenths.
In all, for five of 25 quarters the current value shows a fall where the first showed growth, or the reverse: Q1 2020, Q1 2023, Q4 2023, Q1 2024, Q2 2024.
On annual growth, the differences are of the same order
On the adjusted series, against the same quarter a year earlier, the median difference is 0.3 points for 2023–Q1 2026 and 0.8 for Q1 2020–Q4 2022. On the gross series: 0.2 and 0.8. The chart shows each of the three series.
The revisions of Q2 2026 are only beginning
As of 2 October 2026, Q2 2026 has two published figures: the estimate of 14 August and the first provisional version of 7 September. Both give 0.0% against Q1 2026 (adjusted), −2.0% against Q2 2025 (adjusted) and −0.4% against Q2 2025 (gross series).
The history shows how far earlier quarters changed, not how far this one will. Its row is left out of the statistics.