What to do when your partner asks you to sort the business accounts

It usually happens on a weekend.

There's a carrier bag involved, or a stack of papers, or a laptop opened to a spreadsheet that hasn't been touched in months. And then the words: I just need you to sort it out.

Your partner goes back to whatever they were doing. You stare at the pile. And somewhere between confusion and mild panic, you wonder how you ended up here.

The answer, if it's any comfort, is that you ended up here because you're organised and they're not. Or because you have a head for numbers and they don't. Or simply because someone had to do it, and that someone is you.

Welcome to the unofficial role of small business admin manager. There's no job title, no salary, and the training is entirely on the job. But it's also far less complicated than it looks from the outside, and once you have a system, it actually becomes quite satisfying to keep on top of.

Here's where to start.

Step one: don't panic, assess

Before you do anything else, take stock of what you're actually dealing with.

Put the carrier bag of receipts to one side for now. Open the bank account, ideally a dedicated business account, though many sole traders use their personal account, and that's a problem for another day. Look at the last three months of transactions. You're not analysing anything yet, just getting a feel for the volume.

Now find whatever invoicing system currently exists. This might be:

• A folder of Word or PDF documents
• Entries in a spreadsheet
• Nothing at all (this happens more than you'd think)

And find the expense records. Same exercise, what exists, how complete is it, how far back does it go?

You're building a picture of the gap between where things are and where they need to be. Don't try to fix it all today. Just understand the scope.

Step two: understand what the business actually needs from you

For most UK sole traders and small businesses, the admin breaks down into four areas. Once you understand these, everything else fits into one of them.

Invoicing — the business does work, sends a bill (invoice), and waits to be paid. Your job in this area is making sure invoices go out promptly, tracking which ones have been paid, and chasing the ones that haven't.

Expenses — every legitimate business purchase reduces the tax bill. Materials, fuel, tools, insurance, phone, and software all need to be recorded with receipts. Your job is to make sure nothing falls through the cracks.

Payroll — if your partner employs anyone, or pays themselves a regular wage, payroll needs to be run and reported to HMRC. This sounds intimidating, but it is manageable with the right tools.

Tax records — everything above feeds into the annual self-assessment tax return. The better the records, the simpler the tax return. This is the area where disorganisation is most expensive, either in accountant fees or in stress.

Step three: deal with the carrier bag

The physical receipts need to go somewhere logical before they disappear.

A simple accordion folder with twelve pockets, one per month, works well. Go through the pile, roughly date each receipt, and put it in the right pocket. Don't worry about categorising them at this stage. The goal is just to get them off the kitchen table and into a system where you can find them.

For receipts going forward, the single most effective habit is this: photograph every receipt immediately, before it goes anywhere. One photo, filed into your phone, attached to the expense record in your software. The receipt that goes into a pocket gets washed. The receipt photographed immediately does not.

Step four: get the right tools in place

You don't need expensive software to manage a small business's accounts properly. There are free platforms built specifically for UK small businesses that cover invoicing, expense tracking, payroll and client management, all in one place, without a monthly subscription.

The right tool has a few characteristics:

• Simple enough that you'll actually use it — complexity is the enemy of consistency
• Covers all four areas — invoicing, expenses, payroll, and clients, so you're not juggling multiple apps
• UK-specific — VAT-compliant invoices, PAYE payroll, and self-assessment-ready exports matter
• Free, or close to it — at this stage, the tool should solve a problem, not create a new monthly cost

Once you have the tool set up, the historical records can be entered gradually. Don't try to catch up on everything in one sitting. Set aside an hour a week for the backlog, alongside keeping current records up to date.

Step five: establish the weekly routine

This is where most people go wrong; they sort everything out once and then let it slide again.

The businesses with clean, organised accounts aren't doing anything dramatic. They're doing 20-30 minutes of admin every week without fail. That's it.

A Sunday evening routine that works:

Check outstanding invoices (5 minutes) — anything overdue gets a polite reminder sent tonight. Not tomorrow. Tonight.

Log this week's expenses (10 minutes) — go through the bank statement and receipts from the week. Record everything.

Record payments received (3 minutes) — match incoming payments to invoices and mark them as paid.

Issue any outstanding invoices (5 minutes) — any work completed this week that hasn't been invoiced yet. Do it now, while details are fresh.

Quick payroll check (3 minutes) — if payroll is due this week or next, make sure the figures are ready.

Done. Thirty minutes, once a week. The entire year of admin stays current.

The questions you'll probably have

Do I need to tell HMRC I'm doing this? No. You're helping manage the business's records, not taking on any official role. If the business is a sole trader, it's your partner's personal tax affairs.

What if I find a mistake? Common. Don't panic. Log what you find, note the discrepancy, and if it's significant, run it past an accountant before doing anything that can't be undone.

What counts as a business expense? When in doubt, record it and ask. The broad rule is that it must be wholly and exclusively for the trade. Common allowable expenses for small businesses include: materials, tools and equipment, fuel and vehicle costs for work travel, business insurance, phone and broadband (the business proportion), software subscriptions, accountant fees, and advertising.

Do I need an accountant? For day-to-day admin, no, you can manage this yourself with good tools. For the annual self-assessment, it depends on the complexity. Many sole traders file their own returns once their records are organised. An accountant earns their fee when the tax situation is genuinely complex (VAT, multiple income streams, employees, property income, etc.) or when organised records can be reviewed quickly rather than reconstructed from scratch.

What if they change what they want from you? This happens. The scope of sorting out the accounts can expand quietly into also dealing with the accountant, chasing all invoices, and handling HMRC correspondence. Set expectations early about what you will and won't take on. Being clear about the boundaries is better than quietly resenting an expanding role.

The thing nobody tells you

Once you've built the system and established the routine, it becomes oddly satisfying.

There's something genuinely pleasing about opening the accounts on a Sunday and finding everything where it should be. Knowing exactly what's owed to the business and when it's due. Watching the expense records build up and knowing January won't be a crisis.

You didn't sign up for this. But you might find, a few months in, that you're actually quite good at it.