How do you prove chemical management services savings at review?
Summary
Proving chemical management services savings takes 5 steps: fix the baseline, split price from usage savings, net out fees, attach evidence, get sign-off. The proof holds at a contract review when the customer agreed the baseline and production measure before the contract started, and when each savings line traces to the customer's own invoices, usage logs or waste records.
In the Navistar and Castrol coolant program, Castrol took a flat monthly fee set below Navistar's coolant bill, and coolant usage fell by more than 50% and coolant waste by more than 90% (University of Cambridge IfM, 2016).
IPMVP determines savings by comparing use before and after a measure, "making suitable adjustments for changes in conditions" (EVO, IPMVP Core Concepts 2022).
The UNIDO Chemical Leasing toolkit recommends an evaluation period of 3 to 12 months against the pre-contract baseline (UNIDO Chemical Leasing toolkit, Task 10, accessed 2026).
IPMVP says its guidance can also be applied to related cost savings "or any other quantities being measured and verified" (EVO, IPMVP Core Concepts 2022).
This method is for chemical management services (CMS) and similar performance-based supply contracts, where a provider supplies and manages a customer's chemicals and the customer wants to know what the service saved. It does not set accounting or tax treatment, and IPMVP, an energy protocol, is cited only for its baseline principle.
What do you need before calculating chemical management services savings?
Before calculating chemical management services savings you need a baseline period agreed with the customer, one production measure to normalize usage, the contract's fee structure, and the customer's own records for chemical purchases, usage and waste. A chemical management services contract is a strategic, long-term arrangement in which a provider supplies and manages a customer's chemicals and related services (University of Cambridge IfM, 2016).
The UNIDO Chemical Leasing toolkit, written for a closely related performance-based model, says the baseline data should describe the selected process before implementation and that the company "should use consistent methods to measure and calculate data collected over the period in order to make them comparable" (UNIDO Chemical Leasing toolkit, Task 6, accessed 2026). Its baseline example lists chemical volume per year, water, waste-water, packaging waste and cost per year for each input (UNIDO Chemical Leasing toolkit, Task 6, accessed 2026).
Gather these before the first savings figure:
Purchase invoices and price lists for the baseline period and the review period.
Usage records by chemical and by process, such as top-up logs for coolant sumps.
Production output for both periods, in one agreed unit.
Waste records, such as disposal manifests and waste-water treatment chemical use.
The signed contract, with the fee, its basis and any shared-savings formula.
If the review is about technical service value in general rather than CMS savings, How do you show technical service value before contract renewal? covers that broader case.
How do you document CMS savings step by step?
Documenting CMS savings takes 5 steps, each producing one line of the savings report that the customer can check against its own records.
Fix the baseline: agree a baseline period of complete months before the contract starts, with usage and cost per chemical and the production measure for the same months.
Split price from usage: for each chemical, value the usage change at the baseline price and report the price change on its own line.
Net out fees: subtract the management fee and any other contract charges from the gross savings, or show the fee on its own line if the contract treats it as a replacement for the chemical bill.
Attach evidence: link every savings line to the invoice, usage log, production report or waste record behind it.
Get sign-off: send the savings report to the customer's named contact before the contract review and record their agreement or their corrections.
Keep cost avoidance, such as avoided downtime or a disposal fee that would have risen, on a separate line below the hard savings total. Report it with the customer's own evidence, or label it as an estimate.
The UNIDO Chemical Leasing toolkit says monitoring results "must be well documented and communicated between the partners as they might form the basis for later contract modifications" (UNIDO Chemical Leasing toolkit, Task 10, accessed 2026).
What baseline should chemical management services savings be measured against?
Chemical management services savings should be measured against a baseline period before the contract started, adjusted to the production level of the review period, so that a drop in usage caused by lower output is not counted as a saving. A raw before and after comparison overstates savings when production falls and understates them when it rises.
The International Performance Measurement and Verification Protocol (IPMVP), written for energy savings, gives the principle: savings are determined by comparing use "before and after implementation of an energy efficiency measure (EEM), making suitable adjustments for changes in conditions" (EVO, IPMVP Core Concepts 2022). The same page says its guidance can also be applied to related cost savings "or any other quantities being measured and verified" (EVO, IPMVP Core Concepts 2022). Chemical usage is such a quantity.
In practice, express baseline usage per unit of production, for example litres of coolant per 1,000 parts machined, then multiply by the review period's output to get the adjusted baseline (illustrative). The usage saving is the adjusted baseline minus the actual usage.
Choose the production unit with the customer, write it into the contract, and do not change it at the review. Use 12 complete months for the baseline when usage is seasonal (illustrative), so that the baseline and the review period cover the same seasons.
How do you separate price savings from usage savings in a CMS contract?
To separate price savings from usage savings in a CMS contract, value the usage change at the baseline unit price and report the effect of the unit price change, on the review period's actual volume, as a separate line. The usage line is what the service delivered on site. Claim the price line as a service saving only when the contract makes the provider responsible for purchasing and the price fell beyond the market movement over the same period; otherwise a supplier price cut or a raw material market move would have reached the customer without a CMS contract.
The Navistar and Castrol case shows why the split matters. Castrol's fee was no longer linked to the amount of fluid sold, so it had a financial incentive to improve chemical use efficiency at the plant (University of Cambridge IfM, 2016). That incentive acts on usage, not on price.
The table below shows the split on one chemical, with illustrative values.
Line | Calculation | Result (illustrative) |
|---|---|---|
Adjusted baseline usage | 2.0 L per 100 parts x 50,000 parts | 1,000 L |
Usage saving | (1,000 L minus 700 L actual) x baseline price 4.00 per L | 1,200 |
Price effect | (4.00 minus 3.80 per L) x 700 L actual | 140 |
Total change in chemical spend | 4,000 baseline-adjusted spend minus 2,660 actual spend | 1,340 |
The usage saving of 1,200 is what the service delivered; the price effect of 140 is reported on its own line and claimed only under that condition. Together they reconcile to the total change in spend of 1,340.
Should the CMS management fee be netted out of reported savings?
The CMS management fee should be netted out of reported savings whenever the customer pays it in addition to the chemicals, because the customer's net benefit is the spend reduction minus what it pays for the service. Reporting gross savings with the fee left out is an error a customer's procurement team will look for at the contract review.
In shared-savings relationships studied at US automakers, chemical suppliers propose ways to improve chemical use efficiency and the automakers share a portion of the resulting savings with the supplier (US EPA NCER, Bierma and Waterstraat, accessed 2026). Contract structure decides how to show the fee. In a fee-for-service contract, the fee sits on top of chemical purchases: report gross usage savings, subtract the fee, and show the net figure. In a flat-fee contract, the fee replaces the chemical bill; in a shared-savings contract, check whether the provider's share is paid on top of chemical purchases and net it out if so. In the Navistar program, Castrol accepted a flat monthly fee at a rate below Navistar's coolant bill (University of Cambridge IfM, 2016). There, the saving is the adjusted baseline cost minus the fee, and the fee is the actual spend.
If the provider's staff now do sump testing that customer staff did before, the customer's labor saving is real only if those hours went to other work. The Navistar plant chemists used the change to refocus on production, quality control and health and safety (University of Cambridge IfM, 2016). Show such effects as cost avoidance with the customer's own record of where the hours went.
How do you check a CMS savings claim before the contract review?
To check a CMS savings claim before the contract review, run each savings line through six checks: baseline and normalization, price and usage split, fee netting, evidence, cost avoidance separation and customer sign-off. A line that fails any check is fixed or removed before the report goes out. Have someone other than the report's author, such as a finance analyst on the provider side, run the checks, so that the customer is not the first reviewer to find a gap.
The check table below decides whether each savings line can be shown at the contract review.
Check | Pass | Fail and what to do |
|---|---|---|
Baseline period and production normalization | Pre-contract baseline, agreed in writing, adjusted for output (EVO, IPMVP Core Concepts 2022) | Rebuild from the customer's records for the agreed months; if none exist, label the line an estimate |
Price kept apart from usage | Usage valued at baseline price; price effect on its own line | Recalculate; do not claim a price cut as a service saving |
Fee netted | Net figure shown after the fee or the fee shown as actual spend | Subtract the fee and restate the total |
Evidence per savings line | Invoice, usage log, production report or waste record attached | Remove the line or move it to estimates |
Cost avoidance kept separate | Below the hard savings total, with its basis | Move it out of the total |
Customer sign-off | Named contact agreed in writing before the review | Send the report and resolve corrections first |
The deciding row is the baseline: if the customer never agreed the baseline period and production measure, every other line is open to dispute, so fix that before anything else.
Which chemical management services savings claims fail at contract review?
Chemical management services savings claims fail at contract review when the baseline was chosen after the results, when production changes are ignored, when price and usage are mixed, or when waste savings are valued at a guess.
Common failures and their fixes:
A baseline chosen after results: pick the baseline months in the contract, and keep them.
Ignoring output: normalize usage per unit of production before comparing.
Valuing waste reductions without a unit cost: use the customer's disposal invoices, or a published unit cost. The US EPA P2 Cost Calculator, for example, calculates cost savings using unit costs including treatment fees for wastewater and hazardous waste (US EPA, 2026).
Claiming results that cannot be repeated: the UNIDO Chemical Leasing toolkit says the evaluation should compare baseline data with current data "to assess real achievements" (UNIDO Chemical Leasing toolkit, Task 10, accessed 2026).
Bring in the customer's finance or cost accounting team when the contract includes a shared-savings payment, because the savings figure then moves money. Lubinpla's account technical support summary fixes the customer, period, scope, recipient and disclosure boundary first, then lists the period's technical records to set out proven savings and effects, adding revenue or margin figures only when an ERP source and reference date are given.
Frequently asked questions
How long should the evaluation period be for chemical management services savings?
The UNIDO Chemical Leasing toolkit recommends an evaluation period of 3 to 12 months, because shorter periods take excessive effort and may not give stable results, while longer periods may make corrections come too late (UNIDO Chemical Leasing toolkit, Task 10, accessed 2026).
Can a CMS provider count lower usage caused by lower production as a saving?
No. Usage that fell because the plant made fewer parts is not a service saving. Normalize usage per unit of production, as IPMVP does with "suitable adjustments for changes in conditions" (EVO, IPMVP Core Concepts 2022), and claim only the reduction per unit.
Is chemical leasing the same as chemical management services?
They are closely related performance-based models. In chemical leasing, as UNIDO describes it, the supplier is paid per unit of function, such as the number of pieces cleaned, and the supplier should verify the number of units the customer reports (UNIDO Chemical Leasing toolkit, Task 10, accessed 2026). CMS contracts may use a flat fee, a fee per unit or shared savings.