As a business grows, its accounting requirements usually grow with it.
More customers can mean more invoices. More employees can mean more payroll and expenses. Increasing revenue can bring greater reporting, forecasting and compliance requirements. Eventually, many businesses reach a point where they need to decide whether to continue expanding their internal finance team or outsource some or all of their accounting function.
This creates an important question:
Is in-house accounting or outsourced accounting better for a growing company?
There is no single answer for every business. The right approach depends on your size, transaction volume, internal expertise, growth plans, budget and the level of financial support your management team needs.
This guide compares both models and explains the key factors growing companies should consider before making a decision.
What Is In- House Accounting?
In-house accounting means employing finance professionals directly within your business.
Depending on the company’s size, an internal finance function might include:
- Bookkeepers
- Accounts assistants
- Accountants
- Finance managers
- Financial controllers
- Finance directors
An internal team may handle day-to-day bookkeeping, accounts payable, accounts receivable, payroll, reconciliations, management accounts, financial reporting and other finance activities.
Benefits of In-House Accounting
Having an internal team can provide direct access to finance professionals who understand the business and its operations.
Potential benefits include:
- Direct communication with finance staff
- Greater day-to-day control
- Employees dedicated to the business
- Internal knowledge of customers and suppliers
- Immediate access to financial information
- The ability to build a finance function around specific requirements
For companies with complex financial processes or significant internal finance requirements, having dedicated employees can be valuable.
Challenges of In-House Accounting
Building an internal accounting department also comes with additional responsibilities and costs.
Businesses may need to cover:
- Salaries
- Recruitment costs
- Employer costs
- Benefits
- Training
- Software
- Office resources
- Holiday and absence cover
- Professional development
There is also a recruitment challenge. Finding experienced accounting professionals can take time, particularly when a business needs specialist skills rather than basic bookkeeping support.
What Is Outsourced Accounting?
Outsourced accounting involves using an external provider to manage some or all of your accounting activities.
Depending on the service arrangement, this may include:
- Bookkeeping
- Accounts payable
- Accounts receivable
- Bank reconciliation
- Management accounts
- Financial reporting
- Payroll support
- Cash-flow reporting
- Month-end processes
- Finance administration
Some businesses outsource one specific function, while others use an external provider as an extension of their entire finance team.
This makes outsourcing particularly flexible for growing companies whose requirements are changing.
In-House vs Outsourced Accounting: Key Differences
| Factor | In-House Accounting | Outsourced Accounting |
|---|---|---|
| Employment | Direct employees | External finance provider |
| Recruitment | Business manages hiring | Provider manages finance talent |
| Costs | Salaries and employment costs | Service or agreed monthly fees |
| Scalability | Requires additional recruitment | Capacity can often be adjusted |
| Expertise | Depends on internal team | Access to wider finance expertise |
| Management | Directly managed internally | Managed through provider relationship |
| Technology | Business usually provides systems | Provider may provide or support technology |
| Continuity | Dependent on internal staff | Provider can provide team-based support |
| Flexibility | Changes may require recruitment | Services can often be adjusted |
| Strategic support | Depends on internal expertise | May be available as an additional service |
The important point is that outsourcing does not necessarily mean losing control.
A well-structured outsourced accounting arrangement can give management access to financial information while transferring routine finance responsibilities to an external team.
Why Growing Companies Reconsider Their Accounting Model
The accounting structure that worked for a small business may not work as the company becomes larger.
A founder may initially manage bookkeeping themselves or use a part-time bookkeeper.
As sales increase, however, the volume of financial transactions also increases.
The business may eventually need:
- More frequent reporting
- Better cash-flow visibility
- Stronger financial controls
- Faster month-end reporting
- More sophisticated forecasting
- Better accounts receivable management
- More support for management decisions
At this stage, the question is not simply whether accounting should be outsourced.
The bigger question is:
What finance capabilities does the business actually need?
The Cost of In-House Accounting
Cost is often one of the biggest factors in the decision.
An internal accountant’s salary is only one part of the overall cost of employing a finance team.
Businesses may also need to account for recruitment, employer costs, benefits, software, training, equipment and management time.
As the finance function becomes more sophisticated, the business may need multiple employees with different skill sets.
For example, a growing company could eventually require:
- Accounts payable support
- Accounts receivable support
- Management accounting
- Financial control
- Financial planning and analysis
Building all these capabilities internally can be expensive.
The Cost of Outsourced Accounting
Outsourced accounting typically operates through an agreed service fee.
The exact cost depends on factors such as:
- Transaction volume
- Number of entities
- Services required
- Reporting requirements
- Accounting software
- Payroll requirements
- Complexity of the business
- Level of financial expertise required
The key advantage is that businesses can often access a wider range of expertise without hiring a full internal department.
However, businesses should compare providers based on the total scope and value of the service, rather than simply choosing the lowest monthly fee.
Can Outsourcing Improve Cash-Flow Management?
Accounting and cash flow are closely connected.
A business may report strong revenue while still experiencing pressure if customers are slow to pay.
Accounts receivable management is therefore an important part of a growing company’s finance function.
For a deeper explanation, see The Impact of Accounts Receivable on Cash Flow Statements.
A stronger accounting process can help management understand:
- What customers owe
- When payments are expected
- Which invoices are overdue
- How much cash is available
- What payments are due
- How working capital is changing
This information can make cash-flow planning more effective.
What About Accounts Receivable?
Accounts receivable can become increasingly time-consuming as a company grows.
More customers and higher sales volumes can result in more invoices to monitor and collect.
Some businesses choose to keep their core accounting function in-house while outsourcing accounts receivable or credit control.
These are related but distinct services.
Accounts Receivable Outsourcing vs Credit Control Outsourcing explains the differences between the two models and the types of support each can provide.
This can be particularly relevant for businesses that have a capable internal finance team but need additional capacity to manage customer collections.
Is Outsourced Accounting Secure?
Security is another important consideration when using an external accounting provider.
An outsourced finance provider may have access to commercially sensitive financial information, customer records and other business data.
Before outsourcing, businesses should understand how the provider manages:
- Data access
- User permissions
- Confidential information
- Data processing
- Cybersecurity
- Backups
- Staff access
- Data retention
- Security incidents
Businesses should also understand their contractual responsibilities and those of the external provider.
For businesses considering outsourcing specifically for accounts receivable, our guide Is Accounts Receivable Outsourcing Secure? Data Protection and Compliance Explained provides further information about security and compliance considerations.
Can Outsourced Accounting Scale With Growth?
Scalability is one of the main reasons growing companies consider outsourcing.
An internal finance team generally grows through recruitment.
If transaction volumes increase significantly, the company may need another accounts assistant, accountant or finance manager.
With an outsourced model, the provider may be able to increase the level of support without the company having to recruit another permanent employee.
For example:
Small business → Bookkeeping support
Growing business → Bookkeeping + accounts payable + accounts receivable
Larger business → Full accounting support + management reporting
Established business → Accounting + financial planning and strategic finance support
The exact structure varies between providers, but the principle is that the finance function can develop alongside the business.
What About Strategic Financial Support?
Day-to-day accounting and strategic financial planning are not the same thing.
Accounting tells management what has happened financially.
Strategic finance can help management understand what the numbers mean for future decisions.
As businesses grow, they may need support with:
- Financial forecasting
- Budgeting
- Scenario planning
- Business performance analysis
- Cash-flow forecasting
- Management reporting
- Investment planning
- Growth planning
This is where services such as fractional CFO and outsourced FP&A support can become relevant.
Our guide to Fractional CFO vs Outsourced FP&A: Key Differences Explained explains how these services differ and where they can fit within a growing company’s finance strategy.
This distinction is important because a business may not need to choose simply between a junior internal accountant and a large outsourced finance function.
It may need a combination of operational accounting and strategic financial expertise.
When Does In-House Accounting Make Sense?
An internal accounting team may be appropriate when:
- The business has high transaction volumes
- Finance processes are highly specialised
- Management requires frequent internal interaction
- There is a need for dedicated finance employees
- The company has the resources to recruit and retain accounting professionals
- Finance is a major operational function
- The business requires substantial internal financial control
For some organisations, building a dedicated internal finance department can be a natural part of growth.
When Does Outsourced Accounting Make Sense?
Outsourcing may be worth considering when:
- The company does not need a full-time finance department
- Finance workloads fluctuate
- Recruitment is difficult
- The business wants access to specialist expertise
- Management wants to reduce finance administration
- The company is growing quickly
- Existing finance staff are overloaded
- The business wants a scalable finance function
Outsourcing can also be useful when a company needs additional support without committing immediately to permanent recruitment.
What About a Hybrid Accounting Model?
Businesses do not necessarily have to choose one model exclusively.
A hybrid approach combines internal finance employees with outsourced support.
For example, a company might keep a finance manager internally while outsourcing:
- Bookkeeping
- Payroll
- Accounts payable
- Accounts receivable
- Credit control
- Management reporting
Alternatively, a business might maintain transactional accounting internally while using external specialists for forecasting and strategic finance.
A hybrid structure can therefore provide internal oversight while giving the business access to external capacity and expertise.
A Practical Example
Consider a growing UK company with 50 employees.
The business has an internal finance manager and one accounts assistant. As sales increase, the accounts assistant is spending more time processing invoices and following up outstanding payments.
The finance manager is increasingly pulled into administrative work instead of focusing on reporting, forecasting and business planning.
The company has several options.
It could hire another internal finance employee.
It could outsource specific activities such as bookkeeping or credit control.
Or it could outsource a wider part of the accounting function while retaining the finance manager internally.
The right choice depends on the company’s workload, budget, internal expertise and future plans.
The important point is to assess which finance activities are creating the greatest pressure before deciding what to outsource.
Questions to Ask Before Outsourcing Accounting
Before selecting an outsourced accounting provider, consider:
What services do you actually need?
Do you need bookkeeping, accounts payable, accounts receivable, management accounts or a complete finance function?
How will the provider communicate with your team?
Establish how often you’ll receive reports and who will be your main point of contact.
Which accounting software do they support?
Make sure the provider can work with your existing systems or provide a suitable alternative.
How will financial data be protected?
Ask about access controls, data security, confidentiality and data-processing arrangements.
Can the service scale?
Your finance requirements may change considerably over the next two to five years.
What happens during staff absence?
Understand how the provider maintains continuity if an assigned team member is unavailable.
What KPIs will be reported?
Agree on measurable outcomes rather than relying solely on general service descriptions.
How Should Growing Companies Decide?
Instead of asking whether in-house or outsourced accounting is universally better, businesses should assess their own requirements.
Consider these factors:
Business size: How complex is the current finance function?
Growth rate: How quickly are transaction volumes increasing?
Internal expertise: Do existing employees have the required skills?
Cost: What is the total cost of building and maintaining an internal team?
Scalability: How easily can the finance function adapt to future growth?
Control: How much direct internal oversight is required?
Technology: Which accounting and reporting systems are already in place?
Strategic requirements:
Does management need forecasting, FP&A or CFO-level support?
These factors provide a more useful basis for decision-making than simply comparing monthly costs.
Conclusion
For growing companies, the choice between in-house and outsourced accounting depends on the company’s current needs and future plans.
In-house accounting can provide direct control, dedicated employees and deep internal business knowledge.
Outsourced accounting can provide flexibility, scalability and access to a broader range of finance expertise without requiring a large permanent team.
A hybrid model can combine the two, allowing businesses to retain important finance responsibilities internally while outsourcing activities where external capacity or specialist expertise adds value.
The most effective approach is therefore not necessarily about choosing one model permanently. It is about building a finance function that can support the business as it grows.
Frequently Asked Questions
It can be, particularly when a business does not require a full-time accounting team. However, costs depend on the services required, transaction volumes and complexity. Businesses should compare the total cost of each model rather than salary or monthly fees alone.
Yes. Outsourcing can allow smaller businesses to access accounting expertise without building a large internal finance department. The level of support can often be adjusted as the company grows.
Depending on the provider, businesses can outsource bookkeeping, accounts payable, accounts receivable, credit control, reconciliations, management accounts, payroll support and financial reporting.
Yes. A hybrid model can allow an internal accountant or finance manager to retain oversight while external providers handle selected accounting activities.
It can be, provided businesses select an appropriate provider and establish suitable controls around data access, confidentiality, security and data processing. Security requirements should be assessed before entering into an outsourcing arrangement.
There is no fixed revenue threshold. Businesses may consider outsourcing when finance workloads are increasing, internal staff are overloaded, recruitment is difficult or management requires additional specialist expertise.
It can. The exact scope depends on the provider and service agreement. Accounts receivable may include invoicing, payment allocation, reconciliation, reporting and collections.
Some providers offer additional FP&A or fractional CFO services alongside accounting. These can support forecasting, budgeting, scenario planning and wider financial decision-making.