The Austrian consumer price index (VPI) and value clauses
Pick the starting month from the contract and the comparison month: the tool chains the bases and checks the threshold.
Most Austrian value-protection clauses (Wertsicherungsklauseln) in leases, ground rents, maintenance agreements or instalment prices are linked to the consumer price index, the Verbraucherpreisindex or VPI, published by Statistik Austria. The latest monthly value is for September 2026: 103.9 on the 2025 base. Since the January 2026 data, a VPI 2025 base exists; the VPI 2020 series used here runs to December 2025 and its 2025 annual average is 128.2. When a contract names an older base, values are chained with factors: 1.282 from VPI 2020 to VPI 2025, 1.082 from VPI 2015 to VPI 2020 and 1.107 from VPI 2010 to VPI 2015. As an example, €5,000 with January 2018 as the starting month equals €6,955.70 in September 2026, up 39.11%. Many clauses add a threshold, often 5%, and adjust only once it is crossed. For flats covered by the Tenancy Act, the 2026 MieWeG caps the result further.
Index-linked amount (September 2026)
€13,394.25
+33.94% · factor 1.3394
€10,000.00
| January 2020 · VPI 2015 | 107.6 |
| September 2026 · VPI 2025 | 103.9 |
| Chain factors | 1.082 × 1.282 |
| New amount | €13,394.25 |
Assumptions
Statistik Austria consumer price index; older bases chained through annual averages. Since 2026, residential rents are also capped by the Rent Value-Protection Act (MieWeG). Method and sources
Checked by Radif Partners · Editorial policy · Method and sources
VPI 2025 monthly values in 2026
| Month | VPI 2025 |
|---|---|
| September 2026 | 103.9 |
| August 2026 | 103.7 |
| July 2026 | 103.1 |
| June 2026 | 103.1 |
| May 2026 | 103.1 |
| April 2026 | 103.0 |
| March 2026 | 102.6 |
| February 2026 | 101.4 |
| January 2026 | 100.6 |
€1,000 index-linked to September 2026
| Starting month | Base | Factor | Amount |
|---|---|---|---|
| January 2015 | VPI 2010 | 1.4624 | €1,462.36 |
| January 2020 | VPI 2015 | 1.3394 | €1,339.43 |
| January 2023 | VPI 2020 | 1.1375 | €1,137.49 |
Reading a value clause
Before calculating, find four things in the contract: the index named (VPI 2010, 2015, 2020 or simply “the VPI”), the starting month or base value, any threshold, and whether the new index value becomes the next starting point after each adjustment. Some clauses use the index “published for” a month, others the month of signing. If the clause is silent on a point, the contract as a whole or local practice decides, and a notary or lawyer can help.
Flat rents follow the Rent Value-Protection Act since 2026: see rent indexation in Austria. For a comparable linking method in Italy, see monetary revaluation in Italy.