Do I need an accountant if I use contractor accounting software?

Not necessarily. Good software can handle bookkeeping, VAT, real-time tax tracking and IR35 assessments for a straightforward single-director company. Many contractors use software alone; others keep an accountant for year-end sign-off or one-off advice on bigger decisions. The right answer depends on how complex your affairs are and how confident you feel.

Is accounting software cheaper than an accountant?

Usually, yes. A traditional contractor accountant typically costs roughly £80–£200 a month, while contractor accounting software ranges from free tiers to a few tens of pounds a month. The trade-off is that software gives you tools and automation, whereas an accountant gives you a person who takes work off your plate and offers judgement.

Contractor Accounting Software vs a Traditional Accountant: Which Is Right for You?

Q: Can software handle IR35?

Purpose-built contractor software can produce a scored, factor-by-factor IR35 status assessment with an audit trail, which general bookkeeping tools do not. For genuinely complex or disputed engagements you may still want a specialist's opinion, but for standard engagements a dedicated IR35 tool gives you defensible documentation.

The short answer

It's a trade-off between cost and control (software) and time and judgement (an accountant). Software is cheaper, faster and always-on; an accountant takes work off your plate and offers tailored advice for complex situations.

For a straightforward single-director company, modern contractor software can handle most of it. As your affairs get more complex — or when you simply want a person to lean on — an accountant earns their fee. Many contractors do both.

As a Chartered Certified Accountant, I'll be the first to say there's no universally "right" answer here — and anyone who tells you otherwise is usually selling one option. What matters is matching the choice to your situation: how complex your affairs are, how much time you want to spend, and how confident you feel handling compliance.

The honest comparison

	Contractor software	Traditional accountant
Typical cost	Free to a few £10s / month	~£80–£200 / month
Speed	Real-time — your position is always current	Often monthly or annual cycles
IR35	Purpose-built tools can score and evidence status	Specialist opinion for complex cases
Effort from you	You drive it (with automation doing the heavy lifting)	You hand work over
Tailored advice	Guidance + AI Q&A, not bespoke counsel	Judgement on your specific situation
Scales with complexity	Best for straightforward structures	Better for unusual or complex affairs

When software is the better fit

You're a single-director company with a fairly standard contracting setup.
You want real-time visibility of what you owe, not a once-a-year reckoning.
You're comfortable being hands-on, and you value lower cost and control.
Your biggest need is IR35 documentation and staying on top of VAT and Corporation Tax — areas modern tools handle well.

When an accountant earns their fee

Your affairs are complex — multiple income sources, property, overseas work, a disputed IR35 position, or a company restructure.
You'd rather buy back the time and have someone else carry the compliance burden.
You want bespoke planning for a one-off decision (selling the company, large pension contributions, bringing in a co-director).
You simply prefer a human relationship and the reassurance of a named adviser.

The middle path most contractors actually take

In practice, the two aren't mutually exclusive. A common, sensible setup is to run day-to-day compliance on software — bank feed, categorisation, VAT, real-time tax tracking, IR35 assessments — and engage an accountant periodically: a year-end review, sign-off, or advice on a specific big decision. You get the cost and speed of software with a human safety net where it matters.

The question isn't "software or accountant" — it's "what do I want to handle myself, and where do I want a person?" Most contractors land somewhere in between.

Nebula is built for that first job: the day-to-day compliance a contractor shouldn't have to think about. It produces an accountant-ready monthly pack, so if you do work with an adviser, you hand them clean data instead of a shoebox. See the pricing or read how the IR35 side works.

Frequently asked questions

Do I need an accountant if I use contractor software?

Not necessarily. For a straightforward single-director company, good software can handle bookkeeping, VAT, tax tracking and IR35. Many contractors keep an accountant only for year-end sign-off or one-off advice.

Is software cheaper than an accountant?

Usually — software ranges from free to a few tens of pounds a month, versus roughly £80–£200 a month for a traditional contractor accountant. The trade-off is tools and automation versus a person who takes work off your plate.

Can software handle IR35?

Purpose-built contractor software can produce a scored, evidenced IR35 assessment that general bookkeeping tools can't. For complex or disputed cases you may still want a specialist's opinion.

This guide is general information for UK Ltd company contractors and is not regulated tax or financial advice. Costs quoted are typical market ranges and will vary. Choose the approach that fits your circumstances, and consult a qualified accountant for advice specific to you.