| Approach | Outsourced firm | In-house team |
|---|---|---|
| Cost (annual) | $24K-$120K typical | $80K-$300K+ with benefits per role |
| Speed to start | Days | 2-4 months hiring |
| Coverage | Team: bookkeeper + senior review built in | Single hire: backup is a separate hire |
| Software stack expertise | Broad across clients, common stack | Deep on your stack only |
| Best for | Up to ~$15M revenue, simple structure | $15M+, multi-entity, complex industry |
| Risk | Provider mismatch: swap to another firm | Bad hire: expensive to undo |
| Promotion / career | External: no internal pathway | Internal: staff can grow into senior roles |
| Confidentiality | Limited team sees data | Internal team only |
The cost comparison
Outsourced accounting at the bookkeeper-plus-controller level typically runs $3K-$8K per month depending on company size and complexity. Annualized, that is $36K-$96K for professional accounting coverage. For companies under $5M revenue, this usually covers all the work needed.
In-house equivalent: a bookkeeper at $50K-$75K plus a fractional or part-time controller at $40K-$60K equals $90K-$135K annually for salaries, plus benefits and overhead taking it to $120K-$180K fully loaded. More expensive than outsourced for the same hours.
The cost crossover happens around $8M-$15M in revenue, when accounting work genuinely requires full-time attention. Past that, in-house becomes more cost-effective because you are fully utilizing a full-time hire rather than paying for fractional hours.
What outsourcing does well
Expertise depth without committing to full-time hires. An outsourced firm has seen dozens of similar companies. They bring pattern recognition and best practices that a single in-house hire at a single company cannot match.
Flexibility and continuity. When a team member leaves, the outsourced firm reassigns. When your needs change, they scale up or down. An in-house team has personnel risk and less flexibility.
Lower risk of fraud or errors. Outsourced firms have internal quality controls and separation of duties by default. A single in-house bookkeeper often has too much unsupervised authority. The structural controls at outsourced firms are usually stronger than what small companies build in-house.
What in-house does well
Deep context and business knowledge. An in-house accountant who has been with the company for years knows the nuances of contracts, the history of customer relationships, the quirks of operations. This institutional knowledge is hard to replicate.
Real-time responsiveness. In-house team members can jump into meetings, answer questions immediately, and handle urgent issues without needing to be scheduled. Outsourced teams typically work on agreed cadences.
Cross-functional collaboration. An in-house CFO who attends product meetings, sales reviews, and team check-ins provides value that external engagement cannot. The ongoing presence affects decision quality across the company, not just in finance.
The hybrid approach
Most growing companies land on a hybrid. Outsourced bookkeeping handles transaction entry and basic reconciliations. Fractional controller provides oversight and review. Full-time CFO or head of finance does strategic work.
The split evolves. At $2M revenue, everything is outsourced. At $10M, bookkeeping is in-house while controller and CFO stay fractional. At $25M, both bookkeeping and controller are in-house, CFO is full-time. At $50M+, the full finance team is in-house.
The decision is not all-or-nothing and does not need to be made once. Review annually. Move work in-house when it clearly fits. Keep outsourced when fractional makes more sense. The goal is the right coverage at each stage, not a fixed structure.