External accounting becomes calculable when document volume, degree of preparation, and reconciliation effort are transparent. For companies, it's not just the hourly rate that counts, but the entire structure behind ongoing business transactions.
Unclean invoices, changing responsibilities and numerous queries quickly increase expenses. In contrast, digital preparation and clear responsibilities reduce ongoing coordination requirements.
Practical guidelines help with budget planning without deriving fixed prices from them. What remains crucial is which services are actually needed and how well the accounting is prepared.
The costs of external accounting primarily depend on the ongoing booking volume, the quality of the prepared documents, and the need for reconciliation. A company with neatly prepared digital receipts incurs less effort than a business with incomplete records, queries, and changing responsibilities.
For ongoing business transactions, practical benchmarks are often around £90 to £120 per hour. Preparatory year-end work can serve as a guide for approximately 150 Euro per hour are for guidance only and do not constitute fixed prices or replace individual quotation.
Cost categorizationThe hourly rate alone doesn't determine the actual monthly costs. A low rate with many queries can become more expensive than a higher rate with clean digital preparation and clear responsibilities.
External accounting becomes more predictably cost-effective when documents are provided completely, promptly, and in a digitally usable format. Costs increase when missing information needs to be sought, circumstances clarified multiple times, or documents sorted retrospectively.
Proof volumeMore incoming invoices, outgoing invoices, bank movements and cash receipts increase the ongoing bookkeeping effort.
Degree of preparationComplete, organised, and digitally available documentation reduces the effort involved in searching, queries, and manual rework.
ComplexityVarious business segments, multiple payment methods or many recurring special cases increase the technical review and reconciliation.
Need for evaluationRegular business analyses, cost centres, or additional reconciliations can expand the scope of services.
Typical cost driverUnclear responsibilities often make external bookkeeping more expensive than the sheer volume of documents. Every unresolved query ties up time on both sides.
Benchmark figures are helpful for initial budget planning, as long as they are correctly categorised. Actual costs depend on the scope, prior work, complexity, and desired level of support.
| Cost centre | Practical benchmark | Classification for companies |
|---|---|---|
| Process ongoing business transactions | approx. 90 to 120 Euros per hour | Relevant area for regular financial accounting when ongoing documents, bank transactions, and business events are processed. |
| Preparatory year-end accounts work | Approx. 150 Euros per hour | Suitable for preparatory consultations and structural work, not for tax consulting final services. |
| Additional evaluations | depending on scope and frequency | Greater cost clarity is achieved when evaluations, deadlines, and coordination requirements are established in advance. |
| Tidying up and rework | depending on the condition of the documents | Incomplete receipts, old outstanding amounts, and missing allocations increase one-off or ongoing costs. |
The benchmark figures do not describe binding BAS prices. They provide companies with a reliable guideline as to what scale may be realistic for external bookkeeping.
External accounting services can be billed based on time spent, a monthly flat fee, the volume of documents, or clearly defined additional services. The most suitable model depends on how stable the ongoing accounting effort is.
| Model | Suitable for | Cost-effectiveness |
|---|---|---|
| Hourly rate | varying scope, special cases or unclear initial situation | Flexible, but only plannable with clean time recording and clear performance delimitation |
| Monthly flat rate | stable volume of evidence and consistent scope of services | easily budgeted, as long as additional work is clearly regulated |
| Evidence- or volume-dependent billing | clearly quantifiable business transactions and standardised documents | Transparent, but sensitive to fluctuating volume |
| Project-related additional service | Clean-up work, reorganisation, preparatory structuring or residues | sensible, if one-off costs are not included in the ongoing lump sum |
PredictabilityA monthly flat fee is only economically sound if the scope of services, the volume of documents, and any additional work are clearly described. Otherwise, back-charges will arise precisely where companies are actually seeking planning certainty.
Tax consultancy services should be classified differently from ongoing operational accounting work carried out by an accounting firm. The Federal Chamber of Tax Advisors describes Tax Consultancy Fee Regulation as the statutory basis for remuneration for reserved tax advisory tasks.
The StBVV contains its own fee logics for tax advisors. For bookkeeping services, § 33 StBVV contains regulations on bookkeeping; for time-based fees, § 13 StBVV currently specifies €16.50 to €41 per commenced quarter of an hour.
Accounting firms are often cheaper for ongoing operational accounting because they do not take on tax advisory reserve tasks and do not work according to the same fee logic. However, the actual cost-effectiveness depends on the scope, the quality of the documents, and the need for reconciliation.
Clean demarcationBAS supports businesses with financial accounting, digital document structures, and organisational relief. Tax advice and reserved tax advisory tasks remain with the tax advisor.
Realistic budget planning begins with an honest assessment of your own accounting structure. Companies should not only ask what hourly rate applies, but what internal friction loss external support is intended to compensate for in the first place.
Clarify scopeDocument quantities, bank transactions, cash management, and regular evaluations determine the ongoing performance framework.
Evaluate preliminary workDigital receipts, a clear folder structure, and designated points of contact reduce queries and rework.
Separate additional effortRemediation, clean-up and preparatory finishing work must be calculated clearly separately from the ongoing accounting.
BAS supports companies in their Outsourcing financial accounting and costs should not be viewed in isolation through hourly rates. What's crucial is a collaboration where receipts, responsibilities, and agreements are consistently and cleanly organised.
External bookkeeping is not automatically expensive or cheap. It becomes economical when the scope, quality of documentation, responsibilities, and additional services are clearly defined. The benchmark prices of approximately 90 to 120 Euros per hour for ongoing business transactions and around 150 Euros per hour for preparatory annual closing work provide guidance for initial budget planning. Companies benefit most when external bookkeeping is not merely understood as an outsourced activity. Clear digital structures, reliable coordination, and meticulous preparatory work determine whether costs remain predictable and the internal organisation is noticeably relieved.
Brasser Accounting Solutions GmbH is a specialised accounting service provider that supports companies with financial accounting, payroll accounting, and the structuring of modern digital accounting processes. The aim is a collaboration that is professionally sound, organisationally relieving, and reliably functional in everyday use.
Brasser Accounting Solutions GmbH is part of a corporate group with Quint GmbH Tax Consultancy & Auditing and the Swedish tax office Service Place Årjäng AB.
Note: The BAS is not responsible for the accuracy or completeness of the content on this website. The information is for general informational purposes only and does not constitute legal or tax advice.
