How Much Does Outsourced Accounting Cost?

Managing accounting in-house takes time, software, and sometimes a dedicated employee. To reduce this workload, a business can delegate specific tasks or its entire accounting function to an accounting firm, a specialist provider, or an automated solution. That leaves one central question: how much does this setup actually cost?

The cost of outsourced accounting is the amount a business pays to delegate some or all of its accounting and financial operations. The price depends on the scope of work, the volume to process, and the provider's billing model. A package covering a few routine tasks cannot be compared directly with a broader service that includes ongoing support and advisory work.

Beyond the advertised price, businesses also need to consider the internal expenses they avoid and the time outsourcing frees up. This guide covers the services that may be included, the main pricing models, and the factors to review when assessing the true cost of outsourced accounting.

Key takeaways

• The cost of outsourced accounting depends primarily on the tasks delegated, transaction volume, and processing frequency.
• A business can outsource its entire accounting function or delegate specific tasks, such as invoice collection or bank reconciliation.
• Providers may charge a monthly retainer, an hourly rate, a fee per assignment, or a subscription for an automated solution.
• A quote should always be compared with the cost of managing accounting in-house: salaries, software, recruitment, training, and supervision time.
• Well-organized documents and automation of repetitive operations can reduce the processing workload.
• With Sanso, automate your financial operations using AI agents and focus human involvement on tasks that require a decision.

What is outsourced accounting?

Outsourced accounting means delegating some or all of a business's accounting and financial operations to an external provider. This may be a qualified accountant, an accounting firm, a specialist provider, or an automated solution.

The scope depends on the business's needs. A small or midsize business may delegate only its most repetitive tasks, such as collecting supporting documents, processing invoices, or reconciling bank transactions. It may also choose a broader service that includes preparing annual financial statements, filing returns, or producing monitoring dashboards.

There are two levels of outsourcing:

👉 Partial outsourcing, which covers one or more specific processes.

👉 Extensive outsourcing, which covers most accounting work delegated to a firm or several external solutions.

This arrangement does not eliminate the business's involvement in the process. It must still provide the necessary information, flag unusual transactions, and approve certain decisions. Service quality therefore depends both on the provider's work and on how data flows between the parties involved.

The cost of outsourced accounting naturally varies with the extent of this delegation. A business that only wants to automate a few routine tasks will not pay the same price as one that outsources its entire accounting function and requests regular support.

Which services are included in the cost of outsourced accounting?

The services provided depend on the professional or solution selected. Some packages cover only routine operations, while others include more comprehensive support and advisory work.

Services may include:

✅ Document collection: retrieving and centralizing invoices, bank statements, expense reports, and other supporting documents.

✅ Bookkeeping: recording or importing transactions into the accounting software.

✅ Bank reconciliation: comparing bank transactions with recorded entries to identify discrepancies.

✅ Supplier invoice processing: checking, organizing, and tracking incoming documents.

✅ Customer invoice tracking: monitoring payments and identifying overdue invoices.

✅ Return preparation: organizing the data needed for the tax and payroll-related obligations covered by the engagement.

✅ Year-end closing: reviewing accounts and preparing annual documents when these services are included.

✅ Financial reporting: creating dashboards to monitor cash flow, incoming payments, or expenses.

✅ Advisory services: providing occasional or ongoing support with accounting and financial organization.

These services are not all necessarily included in the starting price. Some may be billed separately or reserved for more comprehensive packages. Before comparing prices, businesses should check which tasks are included, how frequently they are performed, and the level of support provided.

How much does outsourced accounting cost?

The cost of outsourced accounting ranges from a few dozen to several hundred euros per month. For small and midsize businesses, the budget primarily depends on the level of support selected: using software independently, working with an online accounting firm, or receiving more comprehensive support from a traditional firm.

Here are the main indicative price ranges:

The different pricing models

Providers do not all calculate the cost of outsourced accounting in the same way. The billing model should reflect how consistent business activity is and how much visibility the business needs over its expenses.

1. Monthly retainer

The business pays a fixed amount covering the tasks defined in the contract. This approach makes budgeting easier, but the package limits need to be checked: transaction count, returns included, frequency of communication, and services billed separately.

2. Hourly billing

The provider charges for the hours spent on the account. This model may suit a one-time assignment or a need that is difficult to quantify. However, it offers less visibility because the final amount depends on the time actually required.

3. Volume-based pricing

The price is based on a measurable indicator, such as the number of invoices, accounting entries, bank accounts, or employees. Billing therefore changes with business activity. This model is straightforward, provided the business knows what it will pay for exceeding the included volume.

4. Per-assignment pricing

Each service has its own price: year-end closing, dashboard preparation, clearing a bookkeeping backlog, or support with a specific transaction. This approach suits businesses that handle routine accounting internally and outsource only certain needs.

5. Subscription to an automated solution

The business pays a monthly or annual subscription to access software or AI agents. Pricing may depend on enabled features, user count, available connections, or the volume of transactions processed.

Several models can be combined. For example, a firm may offer a monthly retainer for routine accounting and bill exceptional assignments separately. The engagement letter or contract should specify these terms before work begins.

In-house or outsourced accounting: which costs less?

The cost of managing accounting internally goes beyond the salary of the person keeping the books. It also includes employer contributions, recruitment, training, software, and supervision time. Outsourcing brings some of these expenses together in a package or subscription that is easier to identify.

5 tips to reduce the cost of outsourced accounting

Reducing the price does not necessarily mean choosing the cheapest package. Businesses can also reduce the amount of manual work passed to the provider and improve the quality of the information they supply.

1. Define exactly which tasks to outsource

• Not every operation needs to be handled by the same provider. A business can delegate repetitive processing while keeping approvals that require knowledge of its activity in-house.

2. Centralize documents

• Invoices spread across several inboxes, folders, or tools take longer to collect. Centralizing them simplifies processing and reduces requests for additional information.

3. Provide complete data

• Missing documents, unclear descriptions, and incomplete supporting records create more back-and-forth. A clear submission process prevents part of the budget from being spent searching for information.

4. Connect existing tools

• Connecting bank accounts, invoicing tools, and accounting solutions reduces repeated data entry. It also helps limit errors caused by manual imports.

5. Automate repetitive operations

• Invoice collection, bank reconciliation, and payment tracking can be partially automated. The provider or internal team then focuses mainly on exceptions and decisions that require context.

Reduce manual processing with Sanso

The cost of outsourced accounting depends in part on the time required to collect, check, and share information. Sanso automates repetitive financial operations so teams can focus on exceptions and important decisions.

With Sanso's AI agents:

• automate up to 95% of repetitive tasks related to your financial operations;
• collect and centralize supplier invoices;
• simplify bank transaction reconciliation;
• track customer invoices and overdue payments;
• automate some overdue payment reminders;
• create and track quotes and invoices;
• escalate cases that require human approval;
• share better-structured data with accounting contacts.

Automation reduces data entry, document searches, and line-by-line checks. The business retains control over approvals while spending less time on low-value tasks.

Assess the true cost before outsourcing accounting

The cost of outsourced accounting can range from a simple software subscription to several hundred euros per month for comprehensive support. The amount depends on the scope of work, the complexity of the account, and the level of advice expected.

The advertised price alone is therefore not enough to compare two offers. A low-cost plan may leave many operations to the business, while a higher-priced package may include returns, year-end closing, and ongoing support. The most useful measure is the total cost, including the time spent internally.

Automation can also reduce repetitive tasks before information is sent to the accounting firm or approved by the team. With Sanso, small and midsize businesses can organize their financial operations, reduce manual work, and spend more time managing their business.