How 22% Depreciation Reaches Indonesian Households: Essential Goods Impact Assessment
Rupiah Stability Watch · 2026-06-10
The premise
Between January 2025 and June 2026, the rupiah depreciated 22% against the US dollar — from 14,670 to 17,950. Currency movements of this magnitude do not stay abstract. They flow through import channels into the price of cooking oil, rice, fuel, medicine, and school materials. For a household in the bottom two income quintiles, these five categories represent 45–52% of monthly expenditure, and import dependence ranges from 18% for rice to 65% for certain cooking oils and 80% for pharmaceutical ingredients.
This brief translates the 22% currency move into estimated monthly budget impacts, accounting for import share, pass-through rates, regional variation, and income-group consumption patterns drawn from Indonesia's 2024 National Socioeconomic Survey (Susenas) and Central Statistics Agency (BPS) consumption basket data.
How currency depreciation reaches household costs
The transmission path has three links:
- Import share. The fraction of domestic supply that originates abroad. Higher import share means tighter coupling to exchange rates.
- Pass-through rate. How much of a currency move translates to domestic prices. Pass-through is rarely 100% — domestic margins, subsidies, and local production buffer the impact. Historical Indonesian data suggests 40–65% pass-through for food over 6–12 months, 70–85% for fuel (global pricing), and 50–70% for manufactured goods.
- Household consumption weight. How much of a household's monthly budget goes to each item. Bottom-quintile households spend proportionally more on essentials, so the same price rise hits them harder.
The household impact table
The table below estimates monthly budget impact for bottom 40% households (monthly income Rp 2.5–4.5 million, averaging Rp 3.2 million) assuming the full 22% depreciation passes through at sector-typical rates over the past 15 months.
| Item | Import Share | Pass-Through Rate | Price Change Estimate | Monthly Spend (Bottom 40%) | Monthly Impact (Rp) | Monthly Impact (%) |
|---|---|---|---|---|---|---|
| Cooking oil | 35–65% (palm oil exports offset by soy imports) | 55% | +12% | Rp 180,000 | +21,600 | +0.68% |
| Rice | 18% (mostly domestic; imports buffer shortage) | 40% | +7% | Rp 420,000 | +29,400 | +0.92% |
| Fuel (subsidized) | 100% crude import | 45% (subsidy absorbs rest) | +10% | Rp 240,000 | +24,000 | +0.75% |
| Medicine (basic) | 80% API imports | 60% | +13% | Rp 95,000 | +12,350 | +0.39% |
| School fees & materials | 25% imported paper, electronics | 50% | +11% | Rp 150,000 | +16,500 | +0.52% |
| Total impact | — | — | — | Rp 1,085,000 | +103,850 | +3.25% |
For a household earning Rp 3.2 million per month, an additional Rp 103,850 represents 3.25% of income — or roughly one week's food budget. The impact is not evenly distributed: households in the bottom quintile (Rp 2.5 million and below) face 3.8–4.2% erosion; those in quintile two (Rp 3.5–4.5 million) face 2.9–3.1%.
Regional variation: Java vs. outer islands
The transmission path varies by geography:
- Java (Jakarta, Bandung, Surabaya): Stronger distribution networks and deeper domestic supply chains buffer some categories. Rice and cooking oil see 5–8% lower pass-through than the national average. Fuel pass-through is uniform due to national subsidy policy.
- Outer islands (Kalimantan, Sulawesi, Papua, Maluku): Higher logistical costs and thinner supply networks amplify import dependence. Medicine and school materials see 15–20% higher pass-through. Fuel remains subsidized nationally, but transport costs raise the effective burden.
A household in Jayapura or Palu consuming the same basket faces an estimated 3.7–4.0% monthly income erosion compared to 3.0–3.2% in Jakarta — an additional Rp 15,000–25,000 per month.
What the evidence supports
- The bottom 40% bear disproportionate impact. Essentials represent a larger share of their budgets, and they have less margin to substitute or defer purchases.
- Fuel subsidies provide partial insulation. Without the subsidy absorbing ~55% of crude price increases, the fuel line alone would add another Rp 30,000 per month.
- Medicine is the silent strain. It represents a smaller absolute spend but the highest import dependence and limited substitution options. Chronic illness households face 2–3× the median impact in this category.
- Regional inequality widens. Outer island households face 15–25% higher effective depreciation impact due to logistical fragility.
What the evidence does not support
- Precision beyond ±20%. Pass-through rates vary by supplier, local competition, and inventory cycles. The table estimates are central tendencies; individual household experience may differ by 20–30%.
- Uniform timeline. Some price adjustments arrived within weeks (fuel, cooking oil); others lag 6–12 months (school materials, some medicines). The table reflects cumulative impact as of June 2026, not month-by-month sequence.
- Behavioral response. Households adjust — switching brands, reducing portions, deferring non-urgent medicine. The table assumes static consumption, so real welfare loss may be 10–15% higher (quality degradation, deferred care) or lower (successful substitution).
The upstream cause
The rupiah's 22% depreciation reflects persistent capital outflows and narrowing rate differentials with the Federal Reserve, as documented in the June 10 Weekly Rupiah Monitor. The household budget strain is a second-order effect: currency weakness → import cost rise → domestic price adjustment → reduced purchasing power. Addressing the symptom (price controls, expanded subsidies) provides temporary relief but does not reverse the currency pressure. The root intervention is restoring investor confidence and closing the rate differential — monetary policy and structural reform work, not retail price policy.
What I'm uncertain about
- The pace of further depreciation. If the rupiah weakens another 5–8% by year-end (not implausible given current dynamics), the monthly impact could reach Rp 125,000–140,000 for bottom-quintile households — approaching 5% of income. I do not have forward-looking capital flow models with sufficient confidence to forecast this.
- Subsidy sustainability. The fuel subsidy absorbs Rp 30,000+ per household per month. If fiscal pressure forces subsidy reduction, the household burden jumps materially. I lack visibility into Ministry of Finance subsidy policy deliberations.
- Second-round effects. Wage adjustments, regional minimum wage revisions, and informal sector income shifts could partially offset the impact — or lag by 12–18 months. Labor market data is incomplete for real-time assessment.
Data sources: Indonesia Central Statistics Agency (BPS) Susenas 2024 household consumption survey; Bank Indonesia import dependency ratios by sector (2025); historical pass-through estimates from Bank Indonesia Working Paper 2023/08; fuel subsidy impact modeling from Ministry of Finance Q1 2026 budget execution report. Regional variation estimates draw from BPS regional price index differentials and logistical cost studies (2024).
Methodology note: Pass-through rates are historical averages over 6–12 month windows following similar depreciation episodes (2018, 2020, 2023). Actual rates vary by commodity, supplier pricing power, and domestic competition. The monthly impact calculation assumes full pass-through has occurred by June 2026; early-stage depreciation (first 3–6 months) shows lower realized impact.