Overstory
Measuring the light

Pricing
Fixed prices, before the first call.
Three engagement sizes. The price moves with the number of sites and suppliers, never with how long we take.
Three sizes
Pick the size that fits the company.
Tell us how many people you are and the engagement most clients of that size start with opens. Every price is a fixed starting price, agreed before work begins.
Your fitBaselinefrom £9,500 · 6 to 8 weeks50 to 250 people- Takes
- 6 to 8 weeks
- Best for
- Under 250 people
Start with BaselineIncluded
- Scope 1, 2 and 3 inventory
- Data gaps closed with your suppliers
- A one-page summary for the board
- Takes
- 3 to 4 months
- Best for
- 50 to 1,000 people
Start with PathwayIncluded
- Everything in Baseline
- Three costed pathways
- A validated science-based target
- Quarterly check-ins for a year
- Takes
- Rolling, 12 months
- Best for
- Over 250 people
Start with PartnerIncluded
- Everything in Pathway
- ESG report written and assured
- Supplier data programme
- Green energy tender
Prices exclude VAT. A written quote follows the baseline call within two working days.
What moves the price.
- From £600 a siteSitesEach extra site adds data collection, not a new project.
- From £180 a supplierSuppliers with primary dataWe collect from the suppliers that carry most of your Scope 3.
- Quoted by the verifierAssuranceLimited or reasonable assurance by an independent verifier.
- At costTravelSite visits are billed at cost and agreed before we book.
Three sizes
Pick the size that fits the company.
Tell us how many people you are and the engagement most clients of that size start with opens. Every price is a fixed starting price, agreed before work begins.
Your fitBaselinefrom £9,500 · 6 to 8 weeks50 to 250 people- Takes
- 6 to 8 weeks
- Best for
- Under 250 people
Start with BaselineIncluded
- Scope 1, 2 and 3 inventory
- Data gaps closed with your suppliers
- A one-page summary for the board
- Takes
- 3 to 4 months
- Best for
- 50 to 1,000 people
Start with PathwayIncluded
- Everything in Baseline
- Three costed pathways
- A validated science-based target
- Quarterly check-ins for a year
- Takes
- Rolling, 12 months
- Best for
- Over 250 people
Start with PartnerIncluded
- Everything in Pathway
- ESG report written and assured
- Supplier data programme
- Green energy tender
Prices exclude VAT. A written quote follows the baseline call within two working days.
What moves the price.
- From £600 a siteSitesEach extra site adds data collection, not a new project.
- From £180 a supplierSuppliers with primary dataWe collect from the suppliers that carry most of your Scope 3.
- Quoted by the verifierAssuranceLimited or reasonable assurance by an independent verifier.
- At costTravelSite visits are billed at cost and agreed before we book.
Three sizes
Pick the size that fits the company.
Tell us how many people you are and the engagement most clients of that size start with opens. Every price is a fixed starting price, agreed before work begins.
Your fitBaselinefrom £9,500 · 6 to 8 weeks50 to 250 people- Takes
- 6 to 8 weeks
- Best for
- Under 250 people
Start with BaselineIncluded
- Scope 1, 2 and 3 inventory
- Data gaps closed with your suppliers
- A one-page summary for the board
- Takes
- 3 to 4 months
- Best for
- 50 to 1,000 people
Start with PathwayIncluded
- Everything in Baseline
- Three costed pathways
- A validated science-based target
- Quarterly check-ins for a year
- Takes
- Rolling, 12 months
- Best for
- Over 250 people
Start with PartnerIncluded
- Everything in Pathway
- ESG report written and assured
- Supplier data programme
- Green energy tender
Prices exclude VAT. A written quote follows the baseline call within two working days.
What moves the price.
- From £600 a siteSitesEach extra site adds data collection, not a new project.
- From £180 a supplierSuppliers with primary dataWe collect from the suppliers that carry most of your Scope 3.
- Quoted by the verifierAssuranceLimited or reasonable assurance by an independent verifier.
- At costTravelSite visits are billed at cost and agreed before we book.
01of 08Still unsure?Send us your last energy bill and a headcount. We reply with a rough footprint inside two working days.Ask a consultantQuestions
What clients ask before the first call.
- With a baseline call. In 40 minutes we work out which data you already hold, usually energy bills, fuel cards and purchase ledgers, and what a first footprint would take. Most companies have 70 percent of what they need.
- Six to nine weeks for a single-country business, a little longer with many sites. The time goes on collecting data, not on calculating.
- A first footprint starts at £14,000 and a full net zero strategy at £22,000. Every proposal has a fixed price and a list of what you receive.
- We prepare targets to the science-based standard and manage the submission. Sixty-two of our clients hold a validated target today.
- No. About half our clients start without one. We work with finance and operations and leave you with a data model one person can run.
- No. We have no stake in what you buy. If removals belong in your plan we help you specify and tender them.
- It depends on size, listing and where you sell. The first week of an ESG engagement is a scoping note that answers exactly this.
- We stay for the first year on a light retainer: quarterly reviews against the pathway and help when a lever turns out harder than modelled.
01of 08Still unsure?Send us your last energy bill and a headcount. We reply with a rough footprint inside two working days.Ask a consultantQuestions
What clients ask before the first call.
- With a baseline call. In 40 minutes we work out which data you already hold, usually energy bills, fuel cards and purchase ledgers, and what a first footprint would take. Most companies have 70 percent of what they need.
- Six to nine weeks for a single-country business, a little longer with many sites. The time goes on collecting data, not on calculating.
- A first footprint starts at £14,000 and a full net zero strategy at £22,000. Every proposal has a fixed price and a list of what you receive.
- We prepare targets to the science-based standard and manage the submission. Sixty-two of our clients hold a validated target today.
- No. About half our clients start without one. We work with finance and operations and leave you with a data model one person can run.
- No. We have no stake in what you buy. If removals belong in your plan we help you specify and tender them.
- It depends on size, listing and where you sell. The first week of an ESG engagement is a scoping note that answers exactly this.
- We stay for the first year on a light retainer: quarterly reviews against the pathway and help when a lever turns out harder than modelled.
01of 08Still unsure?Send us your last energy bill and a headcount. We reply with a rough footprint inside two working days.Ask a consultantQuestions
What clients ask before the first call.
- With a baseline call. In 40 minutes we work out which data you already hold, usually energy bills, fuel cards and purchase ledgers, and what a first footprint would take. Most companies have 70 percent of what they need.
- Six to nine weeks for a single-country business, a little longer with many sites. The time goes on collecting data, not on calculating.
- A first footprint starts at £14,000 and a full net zero strategy at £22,000. Every proposal has a fixed price and a list of what you receive.
- We prepare targets to the science-based standard and manage the submission. Sixty-two of our clients hold a validated target today.
- No. About half our clients start without one. We work with finance and operations and leave you with a data model one person can run.
- No. We have no stake in what you buy. If removals belong in your plan we help you specify and tender them.
- It depends on size, listing and where you sell. The first week of an ESG engagement is a scoping note that answers exactly this.
- We stay for the first year on a light retainer: quarterly reviews against the pathway and help when a lever turns out harder than modelled.

Start here
Book a baseline call.
Thirty minutes with a consultant. You leave with a rough footprint, the two biggest cuts and what a full pathway would cost.
Your call: Pick a size and a service
No cost, no deck. Replies inside one working day.

Start here
Book a baseline call.
Thirty minutes with a consultant. You leave with a rough footprint, the two biggest cuts and what a full pathway would cost.
Your call: Pick a size and a service
No cost, no deck. Replies inside one working day.

Start here
Book a baseline call.
Thirty minutes with a consultant. You leave with a rough footprint, the two biggest cuts and what a full pathway would cost.
Your call: Pick a size and a service
No cost, no deck. Replies inside one working day.