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Home / Contracts / Adjustment formulas

Price adjustment formulas

The most widely used indices for adjusting prices in service, construction, freight and supply contracts in Oil & Gas, month by month since December 2023, plus a calculator to apply them.

Summary

VariableLatest dataValueIn the month12 mesesSince Dec 2023
Diesel Grade 3Dieselago 20262.499
$/litro
+0,1%+49,7%+208,9%
Wholesale inflation (IPIM)Wholesale inflationago 2026*16.580,3
index
+2,1%+29,8%+151,1%
Retail inflation (CPI)Retail inflationago 202612.276,8
index
+1,7%+33,5%+247,5%
Official dollar (BCRA, Com. A 3500)Official dollarsep 20261.513,77
$/USD
+0,9%+8,0%+135,4%
Freight transport cost (ICT)Transport costsep 2026330,1
index
+2,5%+41,2%+230,1%
Truck drivers' wage (CCT 40/89)Truck driverssep 20261.095.277
$/month
+1,8%+36,4%+357,7%

All together, December 2023 = 100

DieselWholesale inflationRetail inflationOfficial dollarTransportation costCamioneros

Each line shows how much that variable has risen since December 2023. Hover to see the values for each month. Note on the dollar: the December 2023 average includes the days before the 13/12 devaluation.

Calculator

Enter the original price, the base month (that of the original price or the one set by the contract), the month you want to adjust to, and what percentage of the price follows each variable. Whatever you do not assign stays fixed.

Adjustment coefficient3,2799Adjusted price$ 3.279.900,52Variación+228,0%
K = 30% × Diesel (2,499 / 809) + 40% × Wholesale inflation (16,580.3 / 6,603.4) + 30% × Truck drivers (1,075,910 / 239,296)
  • Diesel: +208.9% between Dec 2023 and Aug 2026 → contributes +62.7%
  • Wholesale inflation: +151.1% between Dec 2023 and Aug 2026 (provisional data) → contributes +60.4%
  • Truck drivers: +349.6% between Dec 2023 and Aug 2026 → contributes +104.9%

Formula: K = fixed + Σ (weight × index of the adjustment month ÷ index of the base month). Adjusted price = P₀ × K. The example weights (30% diesel, 40% wholesale, 30% truck drivers) are illustrative: use those in your contract.

Diesel Grade 3

2.499pesos per liter · August 2026
+0,1%in the month
+49,7%in 12 months
+208,9%since Dec 2023

Pump price of Grade 3 Diesel (Infinia Diesel, V-Power Diesel, Quantium Diesel and equivalents), nationwide median in the "Al público" (retail) channel. It is the low-sulfur diesel used by pickups, trucks and equipment with Euro V engines.

See month by month
MonthValue
$/liter
Monthly chg.12-month chg.
ago 20262.499+0,1%+49,7%
jul 20262.497+0,3%+57,7%
jun 20262.490+0,2%+63,6%
may 20262.485+1,9%+70,2%
abr 20262.439+1,5%+58,1%
mar 20262.404+18,8%+58,3%
feb 20262.023+3,6%+35,8%
ene 20261.952+0,7%+33,9%
dic 20251.939+2,4%+35,6%
nov 20251.893+6,8%+35,1%
oct 20251.772+2,8%+29,9%
sep 20251.724+3,3%+24,6%
ago 20251.669+5,4%+22,6%
jul 20251.583+4,0%+19,7%
jun 20251.522+4,2%+18,7%
may 20251.460-5,4%+17,1%
abr 20251.543+1,6%+28,9%
mar 20251.519+1,9%+32,4%
feb 20251.490+2,2%+39,5%
ene 20251.458+2,0%+44,5%
dic 20241.430+2,1%+76,8%
nov 20241.401+2,7%–
oct 20241.364-1,4%–
sep 20241.384+1,7%–
ago 20241.361+2,9%–
jul 20241.323+3,2%–
jun 20241.282+2,8%–
may 20241.247+4,2%–
abr 20241.197+4,4%–
mar 20241.147+7,4%–
feb 20241.068+5,8%–
ene 20241.009+24,7%–
dic 2023809––

Source: Energy Secretariat, prices reported by each service station (Res. S.E. 1104/2004). Compiled by faufena. More detail: by province, brand and channel →

Wholesale inflation (IPIM)

16.580,3index, December 2015 = 100 · August 2026 (provisional)
+2,1%in the month
+29,8%in 12 months
+151,1%since Dec 2023

Wholesale Price Index (IPIM), general level. It measures the prices of goods sold wholesale in the country (domestic and imported). It is the index most used in price redetermination formulas for materials and equipment.

See month by month
MonthValue
index
Monthly chg.12-month chg.
ago 2026*16.580,3+2,1%+29,8%
jul 202616.233,7+0,8%+31,1%
jun 202616.104,2+1,1%+33,7%
may 202615.932,0+2,5%+34,5%
abr 202615.542,5+5,2%+30,8%
mar 202614.780,1+3,4%+27,9%
feb 202614.296,3+1,0%+25,6%
ene 202614.157,7+1,7%+26,4%
dic 202513.925,6+2,4%+26,2%
nov 202513.599,3+1,6%+24,3%
oct 202513.387,0+1,1%+24,1%
sep 202513.243,4+3,7%+24,2%
ago 202512.771,7+3,1%+22,1%
jul 202512.387,3+2,8%+20,9%
jun 202512.044,4+1,6%+21,2%
may 202511.849,4-0,3%+22,4%
abr 202511.880,3+2,8%+27,0%
mar 202511.552,8+1,5%+27,7%
feb 202511.384,1+1,6%+32,7%
ene 202511.200,3+1,5%+43,8%
dic 202411.034,0+0,8%+67,1%
nov 202410.941,2+1,4%–
oct 202410.791,5+1,2%–
sep 202410.665,3+2,0%–
ago 202410.458,6+2,1%–
jul 202410.246,5+3,1%–
jun 20249.940,1+2,7%–
may 20249.682,8+3,5%–
abr 20249.356,9+3,4%–
mar 20249.044,9+5,4%–
feb 20248.579,9+10,2%–
ene 20247.788,9+18,0%–
dic 20236.603,4––

Source: INDEC, Wholesale Price Index System (SIPM). INDEC ↗

Retail inflation (CPI)

12.276,8index, December 2016 = 100 · August 2026
+1,7%in the month
+33,5%in 12 months
+247,5%since Dec 2023

Consumer Price Index, national general level. It is the "official" inflation used for rents, wages and many services.

See month by month
MonthValue
index
Monthly chg.12-month chg.
ago 202612.276,8+1,7%+33,5%
jul 202612.076,4+2,1%+33,8%
jun 202611.826,4+1,9%+33,5%
may 202611.607,4+2,1%+33,2%
abr 202611.363,1+2,6%+32,4%
mar 202611.077,1+3,4%+32,6%
feb 202610.714,6+2,9%+33,1%
ene 202610.413,0+2,9%+32,4%
dic 202510.121,4+2,8%+31,5%
nov 20259.841,4+2,5%+31,4%
oct 20259.603,9+2,3%+31,3%
sep 20259.384,1+2,1%+31,8%
ago 20259.193,2+1,9%+33,6%
jul 20259.024,0+1,9%+36,6%
jun 20258.855,6+1,6%+39,4%
may 20258.714,5+1,5%+43,5%
abr 20258.585,6+2,8%+47,3%
mar 20258.353,3+3,7%+55,9%
feb 20258.053,0+2,4%+66,9%
ene 20257.864,1+2,2%+84,5%
dic 20247.694,0+2,7%+117,8%
nov 20247.491,4+2,4%–
oct 20247.314,0+2,7%–
sep 20247.122,2+3,5%–
ago 20246.883,4+4,2%–
jul 20246.607,7+4,0%–
jun 20246.351,7+4,6%–
may 20246.073,7+4,2%–
abr 20245.830,2+8,8%–
mar 20245.357,1+11,0%–
feb 20244.825,8+13,2%–
ene 20244.261,5+20,6%–
dic 20233.533,2––

Source: INDEC, Consumer Price Index (via datos.gob.ar, series 148.3_INIVELNAL_DICI_M_26). INDEC ↗

Official dollar (BCRA, Com. A 3500)

1.513,77pesos per dollar, monthly average · September 2026
+0,9%in the month
+8,0%in 12 months
+135,4%since Dec 2023

Central Bank reference exchange rate (Communication "A" 3500), the official wholesale dollar. It is the one dollar-denominated contracts paid in pesos usually use. For the formula we take each month's average; the latest daily value is also shown below.

Latest daily value: $ 1,517.00 on 07/10/2026 · end of Sep 2026: $ 1,517.00. In December 2023 it started at $ 361.10 and on 13/12/2023 it jumped to $ 799.95 with the devaluation: that is why the December 2023 average ($ 643.07) is below the end-of-month value ($ 808.45). If your contract is after the devaluation, use January 2024 as the base month.

See month by month
MonthValue
$/USD
Monthly chg.12-month chg.
sep 20261.513,77+0,9%+8,0%
ago 20261.499,92+0,9%+12,9%
jul 20261.485,98+2,4%+17,0%
jun 20261.450,88+3,8%+22,9%
may 20261.397,71+1,1%+21,7%
abr 20261.382,17-1,0%+23,0%
mar 20261.395,95-0,9%+30,6%
feb 20261.408,39-2,8%+33,1%
ene 20261.448,95+0,1%+38,8%
dic 20251.447,95+1,4%+41,8%
nov 20251.428,15-0,5%+42,6%
oct 20251.435,09+2,4%+46,2%
sep 20251.401,07+5,5%+45,7%
ago 20251.328,25+4,6%+40,9%
jul 20251.269,80+7,5%+37,5%
jun 20251.180,74+2,8%+30,6%
may 20251.148,30+2,2%+29,5%
abr 20251.124,09+5,2%+29,4%
mar 20251.068,97+1,0%+25,7%
feb 20251.058,42+1,4%+26,8%
ene 20251.043,61+2,2%+27,5%
dic 20241.021,27+2,0%+58,8%
nov 20241.001,71+2,1%–
oct 2024981,41+2,0%–
sep 2024961,81+2,0%–
ago 2024942,80+2,1%–
jul 2024923,64+2,2%–
jun 2024903,82+1,9%–
may 2024886,70+2,1%–
abr 2024868,88+2,2%–
mar 2024850,18+1,8%–
feb 2024834,88+2,0%–
ene 2024818,31+27,3%–
dic 2023643,07––

Source: BCRA, exchange statistics API (reference rate Com. A 3500). BCRA ↗

Freight transport cost (ICT)

330,1index, December 2023 = 100 · September 2026
+2,5%in the month
+41,2%in 12 months
+230,1%since Dec 2023

FADEEAC Transport Cost Index (Federación Argentina de Entidades Empresarias del Autotransporte de Cargas, the Argentine federation of freight trucking business associations). It measures how much it costs to run a truck: fuel, lubricants, tires, repairs, rolling stock, personnel, insurance, registration fees, financing costs, overhead and tolls. Used for freight and logistics.

Within the index, since December 2023: fuel +251.0% · personnel +396.8%.

See month by month
MonthValue
index
Monthly chg.12-month chg.
sep 2026330,1+2,5%+41,2%
ago 2026321,9+1,7%+41,7%
jul 2026316,6+2,2%+44,4%
jun 2026309,7+1,8%+46,9%
may 2026304,2+1,9%+48,0%
abr 2026298,5+2,4%+46,4%
mar 2026291,4+10,2%+48,3%
feb 2026264,6+2,3%+37,2%
ene 2026258,7+2,1%+36,3%
dic 2025253,4+2,3%+37,0%
nov 2025247,8+2,7%+36,3%
oct 2025241,4+3,3%+35,4%
sep 2025233,7+2,9%+33,2%
ago 2025227,1+3,5%+32,9%
jul 2025219,3+4,0%+32,6%
jun 2025210,8+2,6%+32,9%
may 2025205,6+0,8%+35,6%
abr 2025203,9+3,8%+37,8%
mar 2025196,5+1,9%+41,7%
feb 2025192,8+1,6%+47,9%
ene 2025189,7+2,6%+57,3%
dic 2024184,9+1,7%+84,9%
nov 2024181,8+2,0%–
oct 2024178,2+1,6%–
sep 2024175,5+2,7%–
ago 2024170,8+3,3%–
jul 2024165,4+4,2%–
jun 2024158,7+4,7%–
may 2024151,6+2,4%–
abr 2024148,0+6,7%–
mar 2024138,7+6,4%–
feb 2024130,4+8,1%–
ene 2024120,6+20,6%–
dic 2023100,0––

Source: FADEEAC, Economic and Cost Studies Department (monthly reports). We chain the monthly "general cost" with base December 2023 = 100. FADEEAC ↗

Truck drivers' wage (CCT 40/89)

1.095.277pesos per month, base wage · September 2026
+1,8%in the month
+36,4%in 12 months
+357,7%since Dec 2023

Monthly base wage of a first-category driver under agreement 40/89 (Sindicato de Choferes de Camiones, operating staff). It excludes allowances, overtime and non-remunerative sums. Used as the labor component in freight and truck-based services.

See month by month
MonthValue
$/month
Monthly chg.12-month chg.
sep 20261.095.277+1,8%+36,4%
ago 20261.075.910+1,5%+35,6%
jul 20261.060.010+4,2%+35,0%
jun 20261.017.089+1,6%+37,7%
may 20261.001.072+1,7%+36,9%
abr 2026984.338+7,3%+36,0%
mar 2026917.462+2,0%+30,4%
feb 2026899.473+1,0%+29,4%
ene 2026890.567+4,7%+30,0%
dic 2025850.561+1,0%+26,4%
nov 2025842.140+1,0%+27,9%
oct 2025833.802+3,9%+30,2%
sep 2025802.759+1,2%+30,1%
ago 2025793.240+1,0%+33,7%
jul 2025785.387+6,4%+38,3%
jun 2025738.408+1,0%+38,7%
may 2025731.097+1,0%+44,2%
abr 2025723.859+2,9%+42,8%
mar 2025703.595+1,2%+61,0%
feb 2025695.252+1,5%+98,9%
ene 2025684.977+1,8%+128,8%
dic 2024672.866+2,2%+181,2%
nov 2024658.381+2,8%–
oct 2024640.587+3,8%–
sep 2024616.862+4,0%–
ago 2024593.136+4,5%–
jul 2024567.789+6,7%–
jun 2024532.302+5,0%–
may 2024506.9540,0%–
abr 2024506.954+16,0%–
mar 2024437.029+25,0%–
feb 2024349.624+16,8%–
ene 2024299.335+25,1%–
dic 2023239.296––

Dec 2023: wage scale of November 2023 (no December scale was published). May 2024: no new scale published: the April 2024 scale applies.

Source: Sindicato de Choferes de Camiones (camioneros-ba.org.ar), monthly wage scale sheets. Camioneros ↗

Notes

  • Public data processed by faufena: it may contain errors. What matters is the formula, the indices and the months set by each contract.
  • * Provisional INDEC data: it may change when the following month is published.
  • Each variable is updated when its source publishes it: INDEC and the Energy Secretariat, with a one- or two-month lag; FADEEAC and Camioneros, after the month closes; the BCRA, every day.