The measure
Headline inflation combines the published consumer-price basket into one year-on-year rate.
Headline inflation
Tanzania’s inflation rate
The latest official year-on-year observation opens the macro page; policy and activity indicators support it below.
Headline inflation
4.2%
Headline inflation +31.2% over one year.
Year-on-year change in the consumer-price index. It measures the price level against the same period a year earlier, not the price of one basket item.
Freshness · breach
As at 1 May 2026
Bank of Tanzania — Monthly Economic Review (monthly).
Next expected 8 May 2026, 10:00 UTC+03:00 · grace P2D.Source document ↗Source-restricted · no download offered from this view
System map · inspect the vintages before the arrows
From exchange rate to inflation: questions along the chain
Each box is a separately published object with its own date and definition. Dashed arrows mark channels to investigate—not measured causation.
Select a node to inspect its definition, source and vintage.
Correlation is not causation. Different release calendars, lags and coverage windows prevent these observations from being read as one contemporaneous causal series.
Visual investigation · public
Inflation, then the rate context around it
The page separates price-change measures from policy and market rates instead of compressing unlike metrics into one composite chart.
How do the published headline and core inflation paths differ across available vintages?
Headline and core inflation
Year-on-year percent · missing monthly fields remain gaps
Coverage 2023-01-01 → 2026-05-01
Vintage 2026-05 · final
Revision current · v0
Only declared transformations and compatible comparisons are enabled. The exact state is retained in the URL.
Reuse package · edition 2026-05-a1616e8b9757
| Reference month | Measure | Percent y/y |
|---|---|---|
| 2023-01-01 | Headline inflation | 4.9 |
| 2023-01-01 | Core inflation | 2.5 |
| 2023-02-01 | Headline inflation | 4.8 |
| 2023-02-01 | Core inflation | 2.4 |
| 2023-03-01 | Headline inflation | 4.7 |
| 2023-03-01 | Core inflation | 2.3 |
| 2023-04-01 | Headline inflation | 4.3 |
| 2023-04-01 | Core inflation | 2 |
| 2023-05-01 | Headline inflation | 4 |
| 2023-05-01 | Core inflation | 2 |
| 2023-06-01 | Headline inflation | 3.6 |
| 2023-06-01 | Core inflation | 1.7 |
| 2023-07-01 | Headline inflation | 3.3 |
| 2023-07-01 | Core inflation | 2.1 |
| 2023-08-01 | Headline inflation | 3.3 |
| 2023-08-01 | Core inflation | 2.2 |
| 2023-09-01 | Headline inflation | 3.3 |
| 2023-09-01 | Core inflation | 2.3 |
| 2023-10-01 | Headline inflation | 3.2 |
| 2023-10-01 | Core inflation | 2.5 |
| 2023-11-01 | Headline inflation | 3.2 |
| 2023-11-01 | Core inflation | 2.6 |
| 2023-12-01 | Headline inflation | 3 |
| 2023-12-01 | Core inflation | 3.1 |
| 2024-01-01 | Headline inflation | 3 |
| 2024-01-01 | Core inflation | 3.2 |
| 2024-02-01 | Headline inflation | 3 |
| 2024-02-01 | Core inflation | 3.7 |
| 2024-03-01 | Headline inflation | 3 |
| 2024-03-01 | Core inflation | 3.9 |
| 2024-04-01 | Headline inflation | 3.1 |
| 2024-04-01 | Core inflation | 3.9 |
| 2024-05-01 | Headline inflation | 3.1 |
| 2024-05-01 | Core inflation | 3.6 |
| 2024-06-01 | Headline inflation | 3.1 |
| 2024-06-01 | Core inflation | 3.6 |
| 2024-07-01 | Headline inflation | 3 |
| 2024-07-01 | Core inflation | 3.3 |
| 2024-08-01 | Headline inflation | 3.1 |
| 2024-08-01 | Core inflation | 3.2 |
| 2024-09-01 | Headline inflation | 3.1 |
| 2024-09-01 | Core inflation | 3.2 |
| 2024-10-01 | Headline inflation | 3 |
| 2024-10-01 | Core inflation | 3.2 |
| 2024-11-01 | Headline inflation | 3 |
| 2024-11-01 | Core inflation | 3.3 |
| 2024-12-01 | Headline inflation | 3.1 |
| 2024-12-01 | Core inflation | 3.3 |
| 2025-01-01 | Headline inflation | 3.1 |
| 2025-01-01 | Core inflation | 2.7 |
| 2025-02-01 | Headline inflation | 3.2 |
| 2025-02-01 | Core inflation | 2.5 |
| 2025-03-01 | Headline inflation | 3.3 |
| 2025-03-01 | Core inflation | 2.2 |
| 2025-04-01 | Headline inflation | 3.2 |
| 2025-04-01 | Core inflation | 2.2 |
| 2025-05-01 | Headline inflation | 3.2 |
| 2025-05-01 | Core inflation | 2.1 |
| 2025-06-01 | Headline inflation | 3.3 |
| 2025-06-01 | Core inflation | 1.9 |
| 2025-07-01 | Headline inflation | 3.3 |
| 2025-07-01 | Core inflation | 1.9 |
| 2025-08-01 | Headline inflation | 3.4 |
| 2025-08-01 | Core inflation | 2 |
| 2025-09-01 | Headline inflation | 3.4 |
| 2025-09-01 | Core inflation | 2.2 |
| 2025-10-01 | Headline inflation | 3.5 |
| 2025-10-01 | Core inflation | 2.1 |
| 2025-11-01 | Headline inflation | 3.4 |
| 2025-11-01 | Core inflation | 2.3 |
| 2025-12-01 | Headline inflation | 3.6 |
| 2025-12-01 | Core inflation | 2.3 |
| 2026-01-01 | Headline inflation | 3.3 |
| 2026-01-01 | Core inflation | 2.2 |
| 2026-02-01 | Headline inflation | 3.2 |
| 2026-02-01 | Core inflation | 2.1 |
| 2026-03-01 | Headline inflation | 3.2 |
| 2026-03-01 | Core inflation | 2.2 |
| 2026-04-01 | Headline inflation | 4 |
| 2026-04-01 | Core inflation | 3.1 |
| 2026-05-01 | Headline inflation | 4.2 |
| 2026-05-01 | Core inflation | 3.4 |
- As at
- 2026-05
- Edition
2026-05-a1616e8b9757· revision log →- Coverage
- 2023-01-01 to 2026-05-01 · complete
- Vintage
- Latest published source vintage · final
- Method
- Direct figures extracted from the cited Monthly Economic Review vintages. Missing metrics are not interpolated.
- Annotations
- Latest verified Monthly Economic Review vintage.
bot-monthly-economic-review
- Latest verified Monthly Economic Review vintage.
- Breaks
- No documented discontinuity in this view
- Transformations
- Direct source observations; display rounding only
- Reuse
- Citation and sharing permitted; observation download remains source-restricted.
Read: The two-series view shows whether the latest headline move is shared by the less volatile core measure.
A lower inflation rate means prices rose more slowly; it does not necessarily mean the price level fell.
How have the available policy, bill and bond rate observations moved across MER vintages?
Published policy and government-rate context
Percent per annum · vintage-specific availability
Coverage 2023-06-01 → 2026-05-01
Vintage 2026-05 · final
Revision current · v0
Only declared transformations and compatible comparisons are enabled. The exact state is retained in the URL.
Reuse package · edition 2026-05-fd0151a45d03
| Reference month | Measure | Percent p.a. |
|---|---|---|
| 2023-06-01 | Treasury-bill WAY | 6.48 |
| 2023-07-01 | Treasury-bill WAY | 6.56 |
| 2023-08-01 | Treasury-bill WAY | 6.92 |
| 2023-11-01 | Treasury-bill WAY | 9.34 |
| 2023-12-01 | Central Bank Rate | 5.5 |
| 2023-12-01 | Treasury-bill WAY | 10.48 |
| 2024-01-01 | Central Bank Rate | 5.5 |
| 2024-01-01 | Treasury-bill WAY | 11.76 |
| 2024-02-01 | Treasury-bill WAY | 12.21 |
| 2024-03-01 | Central Bank Rate | 5.5 |
| 2024-04-01 | Central Bank Rate | 5 |
| 2024-04-01 | Treasury-bill WAY | 10.33 |
| 2024-05-01 | Central Bank Rate | 6 |
| 2024-05-01 | Treasury-bill WAY | 7.86 |
| 2024-06-01 | Central Bank Rate | 6 |
| 2024-06-01 | Treasury-bill WAY | 6.75 |
| 2024-07-01 | Central Bank Rate | 6 |
| 2024-07-01 | Treasury-bill WAY | 8.81 |
| 2024-08-01 | Treasury-bill WAY | 10.61 |
| 2024-09-01 | Central Bank Rate | 6 |
| 2024-09-01 | Treasury-bill WAY | 10.85 |
| 2024-11-01 | Central Bank Rate | 6 |
| 2024-11-01 | Treasury-bill WAY | 12.68 |
| 2025-02-01 | Central Bank Rate | 6 |
| 2025-02-01 | Treasury-bill WAY | 11.93 |
| 2025-03-01 | Central Bank Rate | 6 |
| 2025-04-01 | Central Bank Rate | 6 |
| 2025-05-01 | Central Bank Rate | 6 |
| 2025-05-01 | Treasury-bill WAY | 12.94 |
| 2025-06-01 | Central Bank Rate | 6 |
| 2025-06-01 | Treasury-bill WAY | 14.5 |
| 2025-07-01 | Central Bank Rate | 5.75 |
| 2025-07-01 | Treasury-bill WAY | 12.17 |
| 2025-09-01 | Central Bank Rate | 5.75 |
| 2025-09-01 | Treasury-bill WAY | 12.48 |
| 2025-11-01 | Central Bank Rate | 5.75 |
| 2025-12-01 | Central Bank Rate | 5.75 |
| 2025-12-01 | Treasury-bill WAY | 5.87 |
| 2026-01-01 | Central Bank Rate | 5.75 |
| 2026-01-01 | Treasury-bill WAY | 11.3 |
| 2026-02-01 | Central Bank Rate | 5.75 |
| 2026-03-01 | Central Bank Rate | 5.75 |
| 2026-03-01 | Treasury-bill WAY | 5.21 |
| 2026-04-01 | Central Bank Rate | 5.75 |
| 2026-04-01 | Treasury-bill WAY | 5.06 |
| 2026-05-01 | Central Bank Rate | 5.75 |
| 2026-05-01 | Treasury-bill WAY | 4.74 |
- As at
- 2026-05
- Edition
2026-05-fd0151a45d03· revision log →- Coverage
- 2023-06-01 to 2026-05-01 · complete
- Vintage
- Latest published source vintage · final
- Method
- Direct published figures by reference month. This view does not substitute for instrument-specific auction histories.
- Annotations
- Latest verified Monthly Economic Review vintage.
bot-monthly-economic-review
- Latest verified Monthly Economic Review vintage.
- Breaks
- No documented discontinuity in this view
- Transformations
- Direct source observations; display rounding only
- Reuse
- Citation and sharing permitted; observation download remains source-restricted.
Read: The shared scale keeps the policy rate and available government-rate observations in one comparable frame while preserving gaps.
MER values are publication-vintage summaries; auction pages remain the authority for auction-to-auction detail.
The vintage
Macro indicators arrive on different publication schedules; each supporting figure must retain its own reference date.
The distinction
A lower inflation rate means prices are rising more slowly; it does not by itself mean the price level fell.
The Brief
What this observation says—and what it does not
The latest headline rate is presented with its own history before current policy and lagging monthly indicators are introduced.
Inflation provides common context for real yields, household purchasing power and nominal comparisons.
Watch the next NBS release and the contribution of food, fuel and other published components.