Key Takeaways
Key Takeaways
Site expenses managed without disrupting field teams. Project-site staff pay vendors and labour the same way they always have, over UPI. The only change is that the money now comes from a company-funded CashBook wallet instead of cash, so there is nothing new to learn on the ground.
The majority of day-to-day site expenses now flow through CashBook. Labour and vendor payments, food, consumables and hardware, travel and utilities across GPS Renewables’ project sites are handled through UPI wallets rather than scattered cash floats.
Spend is controlled before it happens, not just tracked after. Company-funded wallets can carry preset per-wallet limits, category rules and approval steps for larger payments, with real-time over-limit alerts and instant wallet freeze, so control sits ahead of the spend rather than only in the audit afterwards.
Every site payment leaves a digital trail. Recipient, amount, date and category are captured at the moment of payment, replacing lost receipts and unverifiable cash spends.
Finance gets nationwide, site-wise visibility from one place. Spending across distributed CBG sites is visible on a single dashboard instead of arriving weeks later as paper bills.
The model scales with the project pipeline. As GPS Renewables commissions new plants, onboarding a new site is as simple as issuing a new wallet, with employee KYC done in minutes and a site live the same day.
About Company
About GPS Renewables
GPS Renewables is a Bengaluru-based clean-fuels company and one of the world’s largest biogas-engineering firms. Founded in 2012 by IIM-Bangalore graduates Mainak Chakraborty and Sreekrishna Sankar, the company runs a full-stack clean-fuels business spanning compressed biogas (CBG) and renewable natural gas, 2G ethanol, sustainable aviation fuel (SAF) and green hydrogen, covering the entire value chain from feedstock and microbial solutions to engineering, EPC, project development and operations and maintenance (O&M).
GPS Renewables was instrumental in commissioning Asia’s largest municipal-solid-waste-based Bio-CNG plant in Indore, Madhya Pradesh, which processes 550 tonnes of waste a day to produce compressed biogas and was inaugurated by the Prime Minister of India. The company has 30+ operational and near-complete CBG projects, a pipeline of 200+ plants with oil-marketing companies, and is the only Indian firm with joint ventures with both Indian Oil Corporation (IOC) and Bharat Petroleum Corporation Limited (BPCL). In 2026 it raised ₹635 crore in Series C funding to accelerate its bioenergy pipeline, on annual revenue of roughly ₹1,000 crore and a team of 800+ people.
Challenges
What expense-management challenges do multi-site CBG developers face?
A compressed biogas business does not run from a single head office where everyone spends company money and files bills at the end of the day. It runs from the field. CBG and bioenergy plants are built close to their feedstock, near farms, municipal waste sites, sugar mills and industrial clusters, which places project teams in dozens of locations across multiple states at once. Every one of those sites, whether under EPC construction or in daily O&M, generates continuous ground-level spending: wages for site labour, payments to local vendors and subcontractors, feedstock and transport, hardware and consumables, food for site teams, fuel, and travel and stays for engineers moving between locations.
Historically this spending is run on cash. Head office wires a float to a site in-charge or supervisor, who then pays labourers, buys materials and settles small bills in cash, and reports back later. At one or two sites this is manageable. Across a fast-growing portfolio of plants, each running its own float, it becomes one of the hardest parts of the business to see and control. The renewable energy sector is capital-intensive, with a single CBG plant typically costing anywhere from ₹20 crore to ₹100 crore to build, and working-capital discipline is a recognised industry pressure point. When a large share of day-to-day cash is untracked, that discipline slips.
The core problem is visibility. Cash floats sent to remote sites disappear into undocumented spending, and finance teams reconcile what they can and write off the rest. For any developer running five or more active sites, those cumulative write-offs add up, and missing paperwork causes real pain at GST time, when input-tax credit cannot be claimed without valid invoices. Paper receipts fade, get lost between the site and head office, or never arrive at all. Reimbursement cycles in India commonly run 15 to 45 days, so field staff who front their own money wait weeks to be repaid. And because none of this data is structured, leadership cannot answer basic questions: how much is each site spending, on what, and is it in line with the project budget? For a company scaling toward hundreds of plants under India’s SATAT programme, which targets 5,000 CBG plants nationwide, manual petty cash management across distributed sites simply does not scale.
The stakes rise with every new plant. A developer with a handful of sites can paper over the gaps with spreadsheets, WhatsApp updates and trust in a few supervisors. A developer commissioning plants in state after state cannot. Feedstock has to be paid for the moment it arrives, labour has to be paid on time to keep construction and O&M on schedule, and outstation engineers cannot wait weeks to recover what they spent out of pocket. Each of those pressures pushes teams back toward cash, which is fast on the ground but invisible to the people accountable for the numbers. The result is a widening gap between how quickly money moves at the plant and how slowly, and how incompletely, it becomes visible at head office.
Site staff paid labour and vendors from personal cash, then waited days for reimbursement.
Payments to individual labourers and local vendors left almost no usable digital trail.
Paper bills for hardware, fuel and travel went missing before they reached finance.
Cash floats sat idle across remote project sites with no real-time visibility of balances.
Month-end reconciliation meant rebuilding each site’s spend from memory and scattered receipts.
None of these problems is unique to one company. Any developer that crosses a few dozen sites hits the same wall: the spending happens at the edge, in the field, but control sits at the centre, in finance, and cash leaves a gap between the two. That gap shows up in every one of the points above. Out-of-pocket payments push motivated staff to keep spending their own money, which slows work and buries costs until a reimbursement claim surfaces; payments to individuals and small vendors, the bulk of site spend, carry no receipt a cash model can capture, so they are almost impossible to verify; the paper that does exist fades or disappears between a remote plant and head office, breaking reconciliation and forfeiting GST input credit; and because none of it is visible in real time, idle floats tie up working capital and finance only learns what a site spent weeks later, rebuilt from memory. Individually these are small frustrations. Across a nationwide portfolio they compound into a serious control and compliance gap that grows harder every time a new plant comes online, and it is exactly the gap GPS Renewables set out to close, without slowing down its sites.
Solutions
How CashBook helps GPS Renewables manage site expenses
GPS Renewables adopted CashBook UPI wallets to fund and track the majority of its project-site operating expenses. The approach is deliberately simple, because anything complicated does not survive contact with a busy construction or plant site. Instead of wiring cash floats and chasing paperwork, head office issues each site team a company-funded CashBook UPI wallet. Site staff pay vendors, labourers and shops by UPI, exactly the way they already pay for everything else, and every payment is recorded automatically the instant it happens. Crucially, because the money sits in company-funded wallets rather than cash, spending can be shaped before it happens, through preset limits, category rules and approvals, not only reviewed after the fact, which is what makes it a genuine control system rather than just a ledger.
This matters because it removes the usual trade-off between control and speed. Traditional expense-management software built for office workers assumes desks, corporate cards and end-of-month expense reports, none of which fit a labourer being paid at a biogas plant or a vendor delivering pipe fittings to a remote site. CashBook is built for on-the-ground, high-frequency, small-value spending, so field teams keep working the way they always have while finance finally gets structured data. There is no new app for site staff to master and no change to how a supervisor actually pays a worker; the money simply moves from a company wallet over UPI rather than from a cash box.
Just as importantly, CashBook captures both sides of site spending: payments to merchants such as hardware stores, fuel outlets and hotels, and person-to-person payments to labourers, subcontractors and local helpers. That second category, historically the biggest blind spot in field expense management, becomes fully visible for the first time. The finance team gets a live, site-wise view of spending across the entire portfolio, and every wallet and transaction is tied to a KYC-verified identity, producing the audit trail that a company with major OMC joint ventures and institutional investors is expected to maintain. Today, the majority of GPS Renewables’ day-to-day site expenses run through CashBook.
The design also fits how a CBG portfolio actually grows. Because a wallet can be issued and funded remotely, head office does not have to physically move cash to a new plant or wait for a local banking relationship to be set up before a site can start spending. A site that comes online this month is on the same expense system as one that has been running for a year, under the same categories and the same visibility, so control does not dilute as the footprint expands. Funding stays a head-office decision, spending stays a field activity, and the two are connected by a single record rather than by trust and paperwork. For a developer whose growth depends on standing up plants quickly across the country, that combination of remote funding, on-the-ground UPI payments and automatic capture is what makes disciplined expense management practical at scale rather than aspirational.
Company-funded UPI wallets for every site team, topped up remotely by head office.
Spend controls set before money is spent: per-wallet limits, category rules, approvals and instant freeze.
Every labour and vendor payment captured digitally, with the bill attached at the point of payment.
A real-time, site-wise dashboard giving finance live visibility across the whole portfolio.
KYC-verified wallets with fast onboarding: video KYC in minutes and a site live the same day.
Taken together, these five parts turn scattered cash into one governed system. The company-funded wallets end the cycle of cash advances, ATM runs and idle floats, because head office can fund a site remotely and instantly. The spend controls are what make it a control system rather than just a ledger: finance sets daily, weekly or monthly limits per wallet, category rules allowing fuel, hardware and labour while blocking out-of-policy spend, and approval workflows that route larger payments to a manager before they go through, with real-time alerts on unusual activity and the ability to freeze any wallet on the spot, so abuse is prevented at the point of spend, not discovered afterwards. Every payment, including person-to-person payments to labourers and small vendors, is logged instantly with recipient, amount, time and category, and the bill is captured as payment is made rather than reconstructed later, protecting GST input credit. Finance sees all of it live on a single site-wise dashboard instead of weeks-late paper. Because the platform is NPCI-certified and RBI-licensed with light-touch onboarding, business KYC is done once with standard documents, each team member completes a short video KYC in minutes, and a new site can be funded and live the same day. The result is one system that funds spending remotely, controls it before it happens, captures both merchant and individual payments, and gives finance complete visibility without slowing the people doing the work at the plant.
Impact
What changed after GPS Renewables started using CashBook?
The shift from cash to UPI-based expense management changed how money moves through GPS Renewables’ operations. The majority of day-to-day project-site expenses now flow through CashBook, which means spending that used to vanish into cash floats and lost receipts is captured, categorised and visible. Instead of assembling a picture of site spending weeks after the fact, finance can see it in near real time, plant by plant, across the whole country.
The biggest gain is visibility without friction. Site teams did not have to change how they work, yet leadership gained structured data it never had before: what each site is spending, on whom, and how that tracks against the project. That visibility feeds directly into the working-capital discipline the renewable energy sector demands, because far less company cash sits idle across dozens of sites, and it strengthens the clean financial reporting that lenders, OMC joint-venture partners and Series C investors expect. For a full-stack CBG developer scaling toward hundreds of plants, the ability to manage distributed site expenses as one governed, auditable system, rather than dozens of separate cash boxes, is the difference between growth that stays controlled and growth that outruns its own bookkeeping.
There is a compounding effect, too. Every payment that runs through a wallet adds to a clean, categorised record of what a site actually costs to build and operate, and that history becomes a planning asset. Budgets for the next plant can be grounded in what comparable sites really spent rather than in estimates, variances can be spotted while a project is still live rather than at close-out, and audits, GST filings and investor reporting draw on the same single source of truth instead of a reconstruction from paper. The change is less about any one feature and more about a shift in posture: site spending moves from something the business tolerates and cleans up after, to something it can see, question and steer in near real time.
The majority of site expenses now run through one system instead of scattered cash floats.
Every rupee at site level is traceable, including payments to individual labourers and vendors.
Working-capital exposure dropped as far less company cash sits idle across sites.
Finance is freed from chasing paper, with reconciliation happening continuously.
The model scales with the pipeline: a new site simply means a new wallet.
Behind those five outcomes is a single shift, from cash that moves fast but reports slowly to spending that is visible, controlled and categorised the moment it happens. Consolidating labour, vendor, travel and hardware spend into one workflow gives leadership structured data it never had, and payments that used to be invisible now carry a full record for verification and audit. Because wallets are funded remotely and balances are live, cash stops sitting idle at plants and working capital is freed, while real-time capture replaces the month-end scramble so expense reconciliation runs continuously rather than in arrears. As new plants come online, control keeps pace simply by issuing another wallet.
The tangible value of this shift is well established for businesses that make it. Companies moving site and field spending onto UPI wallets typically cut cash handling and physical cash-runs by around 80%, and reimbursement cycles that in India commonly run 15 to 45 days effectively collapse to zero, because staff no longer front their own money. Industry studies attribute roughly 5% of petty-cash and travel-and-expense spend to leakage and out-of-policy use, much of which is recoverable once every payment is limited, categorised and logged, with unclaimed GST input credit recaptured on top. Because these recoveries scale with the spend base, even single-digit percentage improvements comfortably outweigh the cost of the platform for a large developer, so the payback on tightening distributed site-expense control is generally measured in months, not years. These are industry benchmarks that illustrate the sector economics; they are not GPS Renewables’ internal results. In short, GPS Renewables now manages the bulk of its nationwide site spending through a system that works at the speed and scale of a fast-growing bioenergy developer, keeping field teams productive and finance fully in the picture.
Industry Application
Which renewable energy and infrastructure businesses benefit from CashBook?
GPS Renewables’ challenges are not unique to one company. Any business that builds and operates assets across many distributed sites faces the same core problem: field teams spend money on the ground every day, and head office has no clean way to fund and track it. The spending pattern is remarkably consistent across renewable energy and infrastructure, dominated by site labour, local vendors, materials and travel. CashBook is built for exactly this kind of distributed, high-frequency, small-value spending.
Compressed Biogas (CBG) & Bio-CNG developers: fund and track labour, feedstock, vendor and O&M spend across plants near farms, municipal waste sites and industrial clusters.
Solar & wind EPC and IPPs: give site engineers company-funded wallets for on-site labour, transport, hardware and daily costs across dispersed generation sites.
Waste-to-energy & bioenergy plants: manage high-frequency feedstock, logistics and site-operations payments with per-site visibility instead of cash floats.
Ethanol, biofuel & SAF producers: track construction and plant-operations spending across multiple production sites under one auditable system.
Infrastructure & EPC contractors: replace site petty cash with tracked wallets for labour, materials and subcontractor payments at every project.
O&M and field-service providers: equip maintenance crews with tracked wallets for spare parts, tools and travel while servicing assets in the field.
The pattern GPS Renewables demonstrates is simple: if your teams spend money across distributed project sites, CashBook tracks it, from hardware stores and fuel outlets to labourers, vendors and subcontractors, all through one wallet system visible in one dashboard. For other renewable energy companies moving teams between project sites, see how Heaven Green Energy used CashBook to go largely cashless. For site-level expense management in construction, see how RDash manages distributed project spending, and for field and fleet operations, see how Hopcharge tracks on-the-ground expenses across its operators.
GPS Renewables’ story shows that expense management across a nationwide renewable energy portfolio does not have to be chaotic. A full-stack CBG developer running project sites across India, each generating a constant stream of labour, vendor, travel and materials payments, now manages the majority of that spending digitally through company-funded CashBook UPI wallets, with a complete record behind every transaction.
The old model of cash floats, lost receipts and weeks-late reporting has given way to remote-funded wallets that keep site teams productive and give finance real-time, portfolio-wide visibility. If you build or operate assets across multiple sites, in compressed biogas, solar, wind, waste-to-energy, biofuels or infrastructure, book a demo to see how CashBook can bring the same structure to your project-site expenses.
