Indonesia's economy probably grew about 5.2% from a year earlier in the third quarter, a little slower than the 5.29% pace of the April-to-June period, according to forecasts gathered by Indonesian media ahead of Statistics Indonesia's (BPS) release, due this week. Most estimates fall between 5.1% and 5.4%.

For investors in Southeast Asia's largest economy, the number arrives at an awkward moment. The Jakarta Composite Index briefly fell below 5,000 on Monday before recovering to 5,067 by mid-morning, Kontan reported, after a 16.7% slide in October. A print in line with forecasts would show the real economy holding up while equities sell off.

Second-quarter growth of 5.29% had beaten the 5.12% consensus of 15 institutions surveyed by CNBC Indonesia, though it was down from 5.61% in the first quarter. A year ago, in the third quarter of 2025, the economy expanded 5.04%.

What economists expect from Indonesia's GDP data

David Sumual, chief economist at Bank Central Asia, expects growth of 5.15% to 5.2%, Kontan reported on Tuesday. He said exports and manufacturing were still supporting activity, but that household and government consumption had slowed from the previous quarter.

Josua Pardede, chief economist at Permata Bank, put his forecast at 5.23% and gave the most detailed breakdown. He expects household consumption growth to edge up to 5.13% from 5.06%, while government consumption growth falls to 9.98% from 15.97% and investment growth eases to 5.59% from 6.87%, according to Kontan. He described the slowdown as limited, with growth resilient but increasingly uneven.

Piter Abdullah, program director at Prasasti Policy, sees a range of 5.1% to 5.3%. He told Kontan that a dip in the third quarter is normal by historical standards and that growth usually picks up in the fourth.

Others are more upbeat. The GREAT Institute projects 5.2% to 5.4% and kept its full-year 2026 forecast at 5.3% to 5.6%, Antara reported. Rudi Purwono, dean of the economics and business faculty at Universitas Airlangga, forecasts 5.3%. Gede Sandra, a researcher at InFast, expects about 5.4%.

Factories and credit carry the bullish case

The optimists point to manufacturing and lending. S&P Global's manufacturing purchasing managers' index for Indonesia rose to 52.4 in September from 49.8 in August, and Bank Indonesia's own Prompt Manufacturing Index stood at 52.28 for the quarter, according to the forecasters. The S&P index climbed further to 54.0 in October, the strongest reading among Asia's major factory economies that month, though that falls in the current quarter.

Bank lending is also accelerating. Credit growth reached 13.26% in September, up from 7.7% a year earlier, Sandra said, with investment loans up about 23%. Purwono cited Bank Indonesia figures showing investment loans rose 23.4% in August, compared with 12.3% for working-capital loans and 5% for consumer loans. The GREAT Institute said realized investment rose 7.6% to Rp528.7 trillion.

Purwono also noted that Bank Indonesia's consumer expectations index averaged 127.3 from July to September, digital payment transactions jumped 40.36% in August to 6.11 billion, and exports rose 4.55% in the first eight months of the year.

Weak spots in Indonesian spending

The caution centers on households and the state. Piter said spending by lower-income households has been squeezed by weaker incomes and inflation, and that government aid and drawing down savings are keeping consumption near 5%. He added that growth remains well below the country's potential and the government's target, and that the investment climate needs repair.

M. Rizal Taufikurahman of the Institute for Development of Economics and Finance (INDEF) warned that one month of stronger factory data is not enough to confirm a trend for the whole quarter, Kontan reported. Pardede flagged disasters in several regions that could disrupt farming, distribution, trade and tourism, and urged faster infrastructure repairs and better-targeted social assistance.

Sandra argued that growth near 5% is too slow to reverse the shrinkage of Indonesia's middle class, which he said fell to 42 million people from 59.5 million between 2018 and 2026 on national survey data. He estimates the economy needs at least 6% to change that.

The BPS release will include the expenditure breakdown, which will show whether the drop in government consumption growth that Pardede expects has materialized. Inflation data published earlier this week showed prices rising 3.23% in October, the latest figure Bank Indonesia will weigh alongside the growth data.