Do you need accounting software or just an invoice app?

If you send invoices and hand a summary to an accountant once a year, an invoice app is enough. If you need payroll, bank reconciliation or statutory filing, you need accounting software.

The honest dividing line is what you do with the numbers after the invoice.

An invoice app is enough when you are a sole trader or small operation, your expenses are simple, and an accountant handles the return from a summary you export.

You need real accounting software once you have staff on payroll, need bank feeds reconciled, or file returns yourself under a digital-filing regime.

Plenty of businesses use both: an invoice app on the phone for speed at the point of work, and accounting software the accountant lives in.

They solve different problems

Accounting software maintains a complete double-entry record of your business: sales, purchases, payroll, assets, bank reconciliation, and statutory filings. An invoice app produces and tracks invoices. The overlap is one feature of a much larger system.

Choosing between them is really choosing what problem you have.

When accounting software is right

• You have employees and run payroll.
• You need a balance sheet — for a lender, an investor, or because your company form requires one.
• You have significant purchases and stock to track.
• Your accountant works inside it and reconciles bank feeds.
• You are filing under a digital tax regime that mandates linked digital records.

If any two of those are true, an invoice app is not sufficient and pretending otherwise costs you more in accountancy fees than the software.

When an invoice app is right

• You are one person, billing for your time or your trade.
• Your expenses are simple enough for a shoebox and a spreadsheet.
• Your accountant needs a list of sales and the documents, and does the rest.
• You invoice from where the work is rather than from a desk.

That describes a large share of sole traders, and for them a full accounting package is an expensive way to make PDFs.

What accounting packages do badly

The phone experience, almost universally. Their mobile apps are companions to a desktop product, and raising an invoice standing up in someone's kitchen is slow in a way that means it gets done later — which is the thing that costs you money. They also tend to assume connectivity, and they assume you want to be in the software regularly.

Using both

Common and sensible at a certain size: invoice on the phone where the work happens, export monthly, and give your accountant or bookkeeper the data for the ledger. The handover is a CSV and the PDFs. Getting invoices ready for your accountant covers what that should contain.

The thing to avoid is entering invoices twice in two systems, which produces two versions of the truth and, eventually, a duplicate number.

The migration question

You will likely outgrow an invoice app if you take on staff. That is fine, provided you can export — a complete history you can hand to a new system means the move is an afternoon rather than a re-keying exercise. Check the export exists before you accumulate three years of records, not after.

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