High stakes. One expert. A clear endpoint.

Difficult problems.
Lightning-fast solutions.

When finance, strategy, and systems become one difficult problem, you need someone who can connect the dots. And do the work.

Projects generally start around €10,000.

The person doing the work

One expert.
The whole problem.

Janne GrönroosFounder · Lightning Accounting Oy

Lightning Accounting is a one-expert consulting company for difficult, valuable projects. When you hire Lightning, you work directly with Janne Grönroos. The person understanding the problem is the person doing the work.

An assignment can cross finance, strategy, data, systems, and operations. It may need a financial model, Power BI, a process redesign, AI, or input from a trusted lawyer. The tools follow the problem.

Speed comes from connecting those disciplines, identifying the actual constraint, and moving from analysis to implementation without unnecessary handoffs. It does not mean promising an answer before understanding the question.

Lightning takes on a small number of substantial assignments. Each has a purpose, a defined scope, and an endpoint. The intention is to leave your business better able to operate on its own.

Where Lightning comes in

Problems don’t stay
in one department.

Neither does the solution. Open the situation closest to yours.

01Profitability and business economics

Revenue is up. What happened to the profit?

A business can be busy, growing, and quietly destroying its own margins. The order book looks healthy. People are working hard. Yet cash remains tight and the bottom line barely moves. Cutting a few overhead expenses will not fix a business that loses money in the way it prices, sells, or delivers its work.

Lightning starts with the economics underneath the activity. Which customers and products contribute to the result? Which consume scarce capacity? Where does complexity enter the process, and who pays for it? Company-wide averages often hide the answers that matter most.

Follow the mechanism

An engagement may bring together pricing, customer profitability, workload, capacity, and working capital. These are connected decisions. A contract can look profitable on paper while tying up the people and cash needed for better opportunities.

Consider two customers with the same annual revenue. One buys a repeatable service and pays promptly. The other requires exceptions, frequent changes, and the owner's personal attention. Treating them as equally valuable can lead the company to scale precisely the wrong part of its business.

The analysis needs to distinguish allocated costs from costs that actually change with a decision. It also needs to separate accounting profit from cash timing. One spreadsheet can contain all three views, but it should not quietly substitute one for another.

Make a decision you can act on

The answer might be a pricing change, a narrower customer profile, a simpler delivery model, or a different use of capacity. It might also be a decision to stop selling something the company has offered for years. That requires more than an attractive chart. It needs a business case that survives scrutiny.

A useful model makes its assumptions visible. Management should be able to test changes in price, volume, staffing, and payment terms without rebuilding the entire analysis. Uncertainty belongs in the model rather than in a footnote nobody reads.

A good fit for Lightning

This becomes a Lightning project when the financial impact is significant and the answer crosses pricing, operations, and management information. The goal is a workable change with an observable effect, supported by a model your business can continue using after the engagement ends.

02Management information and analytics

More dashboards. Still no clear answer.

A management team can have access to an enormous amount of data and still struggle to answer a basic question: what changed, why did it change, and what should we do about it? Adding another dashboard rarely fixes disagreements about what the underlying numbers mean.

Lightning begins with the decision. Who needs to make it? How often? What information would change their choice? What is the cost of being wrong or late? Those answers shape the metrics, data model, and implementation. Power BI and Excel are useful tools. They are not the reason to start a project.

Get the definitions straight

Sales, operations, and finance may use the same word for different things. Orders, invoiced revenue, recognized revenue, and collected cash each describe something useful. None is a substitute for all the others. A margin calculation also needs a clear explanation of what it includes.

When definitions are inconsistent, people spend meetings defending numbers instead of making decisions. A project can establish a shared model with traceable sources, explicit calculation rules, and clear responsibility for the inputs. The aim is to make a discrepancy understandable without reconstructing a month's worth of email.

Show what management can influence

A useful view highlights meaningful changes and their drivers. It gives the reader enough context to judge scale and urgency. It does not display every metric simply because the data happens to be available. If a number never changes a decision, it deserves less space on the screen.

Implementation may connect financial and operational systems, but the less glamorous details matter just as much: missing records, update schedules, exception handling, access rights, and maintenance. A report that requires a specialist to repair it every month has introduced a new dependency.

Adoption is part of the job

Publishing a dashboard is a technical milestone. Management using it correctly is the business outcome. The people relying on a model need to understand both its strengths and its limits. A clear handoff and an appropriate maintenance approach belong in the work from the beginning.

The finished result may be visually simple. If it answers the right question in time to act, it has done its job.

03Finance architecture and cash flow

The individual systems work. The business doesn't connect.

Accounting is up to date. Invoices go out. A budget exists. Yet management still lacks a coherent view of how the business works financially. Data changes shape between systems, ownership becomes unclear at the boundaries, and cash requirements keep arriving as surprises.

Finance architecture connects the original business event to billing, accounting, forecasting, and decision-making. Software is part of that architecture. So are definitions, responsibilities, and everyday operating choices. A new platform cannot make those choices on its own.

Cash needs its own model

Profitable growth can consume cash before it generates it. Payment terms, inventory, project billing, and investment timing can matter more in the short term than a positive income statement. A forecast built by extending accounting profit may miss the actual constraint.

An engagement can bring working capital, billing practices, payments, and scenarios into one usable view. Known transactions should be distinguishable from estimates. Management needs to see where pressure may develop and which contributing factors it can influence.

A model should also support realistic updates. If maintaining it requires a complete reconstruction every month, it will stop being useful at exactly the moment the business becomes busy. The right level of detail is the level that improves decisions without creating unnecessary administration.

Fix the structure that creates the rework

When the same information is entered in several places, reconciliation can become an industry of its own. Each individual check looks reasonable. Together they may exist mainly to repair errors introduced by the process itself. That is a reason to inspect the flow from its starting point.

The work may involve reporting dimensions, accounting logic, invoicing practices, or a common structure for budgets and actuals. It also needs a clear answer to where each item of information is maintained and who owns it. Every number does not need a home in every system.

Build to the size of the business

A smaller company does not need the administrative machinery of a multinational. The objective is a structure that can support the business with a reasonable maintenance burden. Simplicity often takes more thought than adding another layer.

Lightning handles the bounded redesign. Ongoing financial administration belongs with the business's internal team or a suitable continuing partner.

04Systems, automation, and AI

Automating a bad process makes it a faster bad process.

Many workflows contain steps whose original purpose has been forgotten. They can be connected through integrations or accelerated with AI. Before doing either, it is worth asking whether the step needs to exist at all. Faster unnecessary work is still unnecessary work.

Lightning looks at the whole chain: where information originates, what happens to it, who uses it, and where people compensate for structural problems. The aim is to reduce repetitive effort and dependence on individual memory. Adding another application to the pile can easily do the opposite.

Give the technology a defined job

Repeatable work governed by clear rules differs from work requiring interpretation. The first may need a straightforward integration. The second may benefit from AI, but it requires a clear definition of the inputs, acceptable output, and handling of exceptions.

Reading a document, extracting its contents, and deciding what to do next do not necessarily belong in one undifferentiated step. A convincing demonstration can hide uncertainty about what happens when the source material is incomplete or contradictory. Those boundaries need to be explicit.

Evaluate the whole cost

The subscription price is only one part of a system's cost. Implementation, maintenance, corrections, and coordination may be more significant. The benefit should be compared with the total burden the solution creates. Sometimes a simple change in working practice removes the problem without additional software.

An implementation may combine APIs, data models, AI, and practical operating instructions. The choice follows the business requirement. A tool being technically interesting is not a customer benefit on its own.

Leave something the business can operate

A solution needs to work when its builder is no longer in the room. Access, ownership, dependencies, and failure handling therefore belong in the design. Your company should retain an understandable way of working rather than a link to a system only one outside specialist can change.

Lightning is a good fit when technology, economics, and operating practices must change together. A small isolated automation is unlikely to justify an engagement of this size. The valuable project is the one that removes a recurring constraint from the business.

05Strategy and operating model

If every decision needs the owner, growth has a ceiling.

What looks like a shortage of people may actually be a shortage of independent decisions. Pricing exceptions, purchasing, customer requests, and work priorities all return to the owner's desk. More employees arrive, but the owner's working day does not get shorter. There are simply more people to coordinate.

Lightning examines the business model and daily operations together. What does the company promise? Which customers are worth making that promise to? What does delivery require? Which decisions repeat, and who has enough information to make them?

Strategy needs to exclude something

When every customer, service, and exception is accepted, the calendar eventually makes the strategic choices. The company starts serving whichever demands are loudest. A useful strategy must therefore reach customer selection, pricing, and the commitments the business is willing to make.

Financial analysis helps distinguish attractive revenue from attractive business. Different options have different capital requirements, workloads, and dependencies on key people. A growth percentage alone cannot tell you what kind of company you are building.

Responsibility requires authority

Handing someone a task does not create meaningful ownership if every deviation still requires the founder's approval. The operating model needs to define what can be decided independently, on what basis, and when an issue should be escalated. People also need the information required to use that authority.

An engagement can connect responsibilities, financial measures, workflows, and systems. The point is not to produce the thickest possible manual. It is to remove recurring ambiguity that otherwise returns as another question every week.

The change should be visible in an ordinary working day

Less waiting, less duplicate work, and fewer routine approvals are more useful than a polished diagram that nobody follows. Not every judgment can be reduced to a rule, but repeated decisions can often be structured far better than they are today.

Lightning fits when commercial direction, business economics, and execution need to line up. The desired endpoint is a company that can carry on with the new approach without keeping an external adviser permanently in the loop.

06Complex tax, calculation, and technical disputes

When the standard answer stops being useful.

Some problems refuse to stay inside the boundaries of accounting, law, or operations. A calculation may rely on a mistaken understanding of the business. An old system may produce evidence nobody can readily use. Several individually reasonable decisions may have created an arrangement that no longer makes sense as a whole.

The first task is to establish what happened, which figures can be supported, and the precise question that needs an answer. Facts, assumptions, interpretations, and missing information should remain distinguishable. Urgency does not improve unreliable source data.

Find the break in the reasoning

An engagement may include organizing evidence, reconstructing calculations, testing interpretations, and developing a technical argument. The result needs to be traceable to the original material. Confident wording cannot compensate for weak analysis.

If the issue concerns cost allocation, for example, the underlying activity and calculation basis must be understood before the result can be assessed. The defect may lie in the evidence, the method, or how the method was applied. Those are different problems and may require different responses.

Bring in the expertise the issue requires

Lightning accepts complex assignments within its areas of competence. Where legal advice or another specialty is needed, the project can involve a trusted outside expert. An established lawyer relationship is available when the assignment calls for it.

Lightning is not presented as a law firm, and no particular authority decision is promised. The work is to create a defensible, understandable basis for moving the matter forward. That may be valuable even when the original position needs to change.

When to get in touch

The fit is strongest when the economic stakes are meaningful, the evidence is difficult, or normal progress has stalled. Explain what happened, what must now be resolved, and whether an external deadline applies. Contradictions are useful information; do not tidy them out of the initial account.

A difficult situation does not need another confident guess. It needs someone willing to establish what is supported and work through the consequences.

For accounting firms

When the problem stops being routine accounting.

An accounting firm can reach a point where diligent routine work is no longer enough. The evidence is inconsistent, the calculation is technically difficult, or a discussion with the Finnish Tax Administration has drifted away from what actually happened in the business.

Lightning can support the firm with a bounded technical assignment: reconstructing a calculation, organizing the evidence, or developing an argument that connects the facts to the issue being decided. The first goal is a sufficiently clear understanding of the problem.

An official number can still be wrong

A figure does not become correct because a tax authority produced it. If the inputs, method, or reasoning are defective, the defect needs to be demonstrated. The same standard applies to calculations prepared by the client and the accounting firm.

The work starts with the available record. What was asked? What was answered? Which facts support the calculation? Which points remain interpretations? A lengthy response can still miss the decisive question if those categories are mixed together.

On the firm's side, with the facts in view

Lightning helps accounting firms resolve difficult specialist problems. Where the analysis reveals a correction is needed, that becomes part of the answer. Where a sound position needs stronger calculations, those can be built. Legal expertise can be coordinated where the matter requires it.

Assignments are accepted within Lightning's competence and scoped around their economic significance. This is a specialist project, not an arrangement for outsourcing routine monthly accounting. The typical starting size of around €10,000 also applies here.

For an initial inquiry, describe the issue, its financial significance, the stage it has reached, and any external deadline. A concise explanation is enough to start; the complete evidence file can follow through an appropriate channel.

Beyond incorporation

Build a Finnish operation
that actually works.

A company registration is the beginning. Payments, finance, contracts, systems, and reporting still have to work together.

01From Finnish subsidiary to functioning business

A registered Finnish company is a starting point. It is not an operating business. The real work begins when the company needs to collect money, pay people, enter contracts, produce reliable information, and function as part of an international organization. That is the gap this engagement is designed to address.

Lightning works with foreign businesses building a substantial Finnish presence: a subsidiary, a business unit, or a local operation with real commercial activity. The objective is to connect the pieces so management can run the business. This is a high-value implementation project, not a low-cost incorporation package.

Start with the business you intend to run

The operating model should follow the intended activity. What will the Finnish company sell? Who will its customers be? Where will the work happen? Which decisions will remain with foreign management, and which must be made locally? How will the Finnish operation interact with the rest of the group?

These questions shape the finance and administrative design. Starting with a list of registrations can leave essential commercial choices unresolved until they become urgent. The project should establish the practical requirements early enough that systems, responsibilities, and outside specialists can be coordinated around them.

That does not mean predicting every future development. It means distinguishing what must work at launch from what can sensibly be added later. A new operation needs a sound foundation without inheriting a large company's entire administrative overhead.

Banking is an operating dependency

Access to banking and payment services can be a source of real friction for foreign-owned businesses. A Finnish registration does not, by itself, solve the practical questions of receiving customer payments, paying suppliers, assigning access, or connecting transactions to financial systems.

The engagement can help organize the information and operating requirements needed for banking discussions and identify how unresolved banking arrangements affect the launch plan. The point is to treat payments as part of the operating design rather than as an administrative detail someone will sort out later.

The provider's decisions remain its own. Lightning does not promise a bank account or a particular approval timetable. A useful plan makes those dependencies visible and distinguishes a confirmed arrangement from an application still under review.

Build the financial foundation once

Accounting, tax processes, invoicing, payment flows, and reporting should form one understandable system. If they are designed independently, the foreign parent may end up with a locally compliant set of records that still fails to answer management's questions.

The project can coordinate the financial administration model, reporting dimensions, systems, and practical responsibilities. Local requirements and group reporting needs should be considered together. Where they require different views, the connection between those views should be explicit instead of recreated manually each month.

The same applies to the data that supports invoicing and accounting. Product, customer, project, and organizational information need an agreed home and a clear owner. A relatively small decision made at launch can otherwise become a recurring reconciliation problem.

The appropriate structure depends on the business. There is no reason to copy another company's setup simply because it operates in Finland. A project business, a service operation, and a company moving goods may need quite different information and workflows.

Coordinate contracts and specialist input

Commercial arrangements, legal documentation, and financial treatment are connected. They should not emerge from separate conversations that nobody reconciles. Lightning can coordinate with a proven lawyer relationship when the project requires legal expertise, while keeping the financial and operational implications in view.

This does not turn Lightning into a law firm or replace the specialist's own work. It gives the business a way to connect the advice with implementation. A technically sound document still needs to work with the billing model, internal responsibilities, and systems the company actually uses.

Where employment is part of the intended operation, payroll and employment setup also need a place in the launch plan. The scope follows the actual staffing arrangement. It should not be assumed that a process used by the foreign parent can be copied unchanged into the Finnish company.

Give foreign management a usable view

Management needs more than a monthly file from Finland. It needs to understand what the figures mean, what has changed, and which decisions require attention. Language, reporting conventions, and fragmented responsibility can all create distance between the local operation and the people accountable for it.

An engagement can establish the reporting structure, information flow, and communication responsibilities between foreign management and Finnish service providers. The aim is to make routine activity understandable and exceptions visible. The parent company should know where to obtain an answer without becoming the coordinator of every administrative detail.

Reporting should also reflect the actual economics of the Finnish operation. Revenue, cost, cash requirements, and commitments need to be visible at a level useful for management. Adding a Finnish legal entity to a group chart is not the same as adding a manageable business unit.

A practical bridge from the Baltics

Lightning's founder, Janne Grönroos, lives in Lithuania and has practical experience with Baltic companies establishing operations in Finland. That perspective is particularly relevant to businesses from Lithuania and Latvia that need to move beyond incorporation into everyday execution.

The value is in understanding the friction: who needs what information, why a process has stalled, which issue is actually blocking progress, and how financial and operational choices connect. The project still begins with your business and its requirements. Geography is useful context, not a substitute for analysis.

An endpoint, not a permanent dependency

The work should have a defined purpose and an endpoint. Depending on the assignment, that may mean a functioning financial setup, a coordinated operating model, management reporting, and an orderly transition to ongoing providers. The exact deliverables are scoped around the business rather than sold as a fixed incorporation bundle.

Lightning handles the difficult setup or transformation project. Taloushotelli can provide ongoing accounting, financial administration, and continuing CFO support. This separation matters: the specialist project can end without leaving the business to invent its own maintenance arrangement.

Projects generally start around €10,000. Larger assignments are appropriate when the scope and economic stakes justify them. If you are building a real Finnish operation and the pieces are not coming together, describe the intended business, what is already in place, and what currently prevents it from working.

The economics of the engagement

A serious problem.
A worthwhile project.

€10,000

Typical starting project size. Scope and pricing agreed for the assignment.

The right question is what the unresolved problem costs your business. Lost margin, trapped cash, poor decisions, and the owner’s time can matter far more than the cost of an engagement.

Lightning accepts a small number of substantial projects. Larger assignments make sense when the impact, complexity, and scope justify them. An isolated spreadsheet correction or a routine software question is usually too small.

A useful engagement has an observable goal, access to the relevant information, and someone able to make decisions. The project should end with a change the business can use.

What makes an engagement a good fit?

The problem has meaningful financial consequences. Resolving it requires several disciplines to connect. You want implementation as well as analysis, and you are prepared to change the practices creating the problem. The exact scope is established around those requirements.

Looking for ongoing financial support?

Different job.
Same family.

Taloushotelli handles ongoing accounting, financial administration, and continuing CFO services. Lightning handles the difficult, bounded transformation project.

Where the responsibilities meet

Some businesses need a major change before a continuing service can work well. Others already have a functioning finance partner and need help with a specific challenge. Lightning’s role follows the project. It does not need to become your permanent finance department.

When ongoing support is needed, Taloushotelli provides a clear destination. The project and the recurring work can have distinct scopes and responsibilities. You do not need to keep a transformation project running simply to maintain what it created.

The aim is a working business with an appropriate level of support. Sometimes that means a continuing CFO service. Sometimes the CFO can visit, solve the problem, and leave.

Visit Taloushotelli

Start with the actual problem

What needs
to work better?

Tell me what is stuck, why it matters, and what a useful outcome would look like. Include any deadline that is already real.

Janne GrönroosLightning Accounting Oy+358 50 575 9275Describe the problem by email