Switching to an online accountant should feel like a fresh start — quicker answers, clearer numbers, and less time spent chasing receipts. But if the handover isn’t managed properly, you can end up with the exact thing you’re trying to avoid: gaps. Missed deadlines, missing logins, half-finished work, and that uneasy feeling that nobody’s fully “on it” yet.
This guide gives you a simple, practical checklist so your switch is smooth, your compliance stays tight, and you don’t pay for mistakes that were totally avoidable. If you want a quick overview of how Asmat & Co supports clients online, start with our Services page.
What a “gap” looks like (and why it happens)
Most handover problems fall into a few predictable categories:
- A deadline lands mid-switch and nobody submits it
- Your bookkeeping is in Xero/QuickBooks/FreeAgent, but your new accountant can’t access it
- VAT or payroll is live, but agent authorisation hasn’t been updated
- HMRC letters and notices are still going to the old accountant
- Your year-end is “nearly done”, but there’s no clear list of what’s outstanding
A clean handover removes uncertainty. Your new accountant should be able to pick up work without guessing, rebuilding records, or relying on “we’ll sort it later”.
Step 1: Be clear on what you need your new accountant to handle
Before you start requesting documents, get clear on scope. The handover is faster when everyone knows what’s included and what isn’t.
Most switches include a mix of:
- Year-end accounts and filing for limited companies — Company Accounts
- Self Assessment and personal tax support — Tax Return
- VAT registration, schemes, and VAT returns — VAT
- Payroll, RTI submissions, and ongoing payroll admin — Payroll Services
If you’re not sure what “good” ongoing support looks like online, it’s worth scanning Benefits of Hiring an Online Accountant to understand what you should expect day-to-day.
Step 2: Build your handover pack (the core checklist)
This is the pack that prevents delays. You won’t always need every item, but the more you provide upfront, the less back-and-forth you’ll deal with.
A) Business and tax details
- Legal business name (and trading name if different)
- Company number (limited company)
- Your UTR (and the company UTR if applicable)
- VAT number (if registered)
- PAYE reference(s) (if you run payroll)
- Registered office address and director details (if applicable)
B) Access to systems (this is where switches often stall)
- Your accounting software login (or permission to access the file)
- Bank account access for feeds (or confirmation of which accounts are in scope)
- Payment processor access if relevant (Stripe/GoCardless/PayPal, etc.)
- Your HMRC online account access (personal and business where relevant)
C) Key documents and reports
- Last filed accounts and Corporation Tax return (limited company)
- Last Self Assessment return (if you’re self-employed / a landlord / a director with SA)
- VAT returns for the last 4 quarters (or last 12 months)
- Payroll summaries, FPS/EPS history, and pension details (if you run payroll)
- Details of any loans, finance, leases, or hire purchase agreements
- Dividend paperwork (if relevant) and director’s loan account position (if relevant)
D) What’s in progress right now
To avoid gaps, you need a simple “in-flight” summary:
- Your year-end date
- Upcoming VAT quarter end and filing due date
- Payroll schedule (monthly/weekly), plus pension provider details
- Any open HMRC queries, investigations, or payment plans
- Anything your old accountant has started but not finished — and what is still outstanding
If you’ve ever had a late filing scare (or you’re trying to get ahead of one), the practical breakdown in Late tax returns and penalties is a helpful reference for what can go wrong when deadlines get missed.
Step 3: Start professional clearance early (so you’re not stuck waiting)
A proper switch normally involves professional clearance — your new accountant contacts your old one to confirm there are no professional issues and to request records.
This step helps uncover:
- what’s missing
- what’s unfinished
- what deadlines are coming up
- what your old accountant has already prepared
Don’t leave this until the last minute. If you’re close to a deadline (especially around Self Assessment season), starting early keeps you in control.
Step 4: Sort HMRC agent authorisation and correspondence
Even with perfect bookkeeping, things can grind to a halt if your new accountant can’t act for you on HMRC systems.
To keep things moving:
- Make sure you can log into your HMRC account(s) yourself
- Confirm which taxes need agent access: Self Assessment, Corporation Tax, PAYE, VAT, CIS, etc.
- Redirect correspondence so you don’t miss important notices
Deadlines and penalties are real money. For Self Assessment, if you miss the filing deadline you can face an initial £100 late filing penalty (with further penalties if the return remains outstanding). The government sets out how these penalties escalate on Self Assessment tax returns: Penalties.
If you’re VAT registered, late VAT returns fall under a points-based late submission system that can lead to a £200 penalty once you reach the penalty threshold.
Step 5: Make the switch MTD-proof (so you don’t redo the handover next year)
Making Tax Digital for Income Tax is a big change for sole traders and landlords. From 6 April 2026, MTD for Income Tax applies to those with qualifying income over £50,000, with the threshold reducing to £30,000 from 6 April 2027, and £20,000 from 6 April 2028. You can see the timeline on the government campaign site: MTD for Income Tax dates you need to know, and the longer-term rollout is set out in Making Tax Digital for Income Tax Self Assessment for sole traders and landlords.
If you’re required to use MTD for Income Tax from April 2026, HMRC has confirmed it will not apply penalty points for late quarterly updates in the first tax year (2026–2027), although penalties can still apply for late tax returns and late payment.
The takeaway: your handover should include software readiness and a clear process for ongoing record-keeping — not just “we’ll sort the return at year-end”.
Step 6: Agree a 30–60 day “no-gaps plan”
This is the part that makes the switch feel calm.
1) Decide who files what next
List the next submissions and assign responsibility:
- VAT return (and payment)
- payroll runs and RTI submissions
- accounts and Companies House filings (if applicable)
- Self Assessment or Corporation Tax work in progress
2) Keep bookkeeping consistent during the switch
For the next month or 2, keep it simple:
- don’t start a new spreadsheet “just in case” unless agreed
- keep invoicing in 1 place
- upload receipts as you go
- keep personal spending out of the business account where possible
If you’re a sole trader, having the right routine matters — and so does knowing what records you should be keeping. The service overview on Sole Trader Accounting gives you a practical sense of what “good admin” looks like.
3) Make sure your structure matches your real situation
A lot of handover confusion comes from mismatched assumptions (for example, you’re treated like a simple limited company, but you’ve also got property income or a side trade). If you want your new accountant to “get” your setup quickly, it helps to anchor it to the right category:
- Contractors and freelancers: Contractors
- Limited companies: Limited Company Accountants
- Partnerships: Partnership
- General SME support: Small Business Accountants
- A broader overview: Who We Help
Step 7: Watch for these common tripwires
These small issues cause big delays:
- 1 person holds all logins (bank, HMRC, software) and you don’t have access
- journals exist in the accounts with no notes or explanation
- the director’s loan account is unclear because personal and business spending has been mixed
- VAT scheme changes mid-quarter without a plan
- payroll and pensions are out of sync
If VAT registration is new (or you’re considering it), it’s also worth understanding the pricing impact early. This guide explains the common commercial knock-ons: How Can Registration Vat Affect My Price.
The quick handover checklist (save this)
- Confirm what services you need (accounts, tax, VAT, payroll, bookkeeping)
- Gather UTR(s), VAT number, PAYE refs, company number
- Provide software access and confirm which bank accounts are in scope
- Share last filed returns and current-year work in progress
- List deadlines in the next 60 days and assign responsibility
- Start professional clearance early
- Sort HMRC agent authorisations and correspondence
- Make the switch MTD-proof with software and a quarterly routine
Ready to switch without the stress?
If you want your handover handled properly — with a clear checklist, a realistic timeline, and no messy gaps — speak to Asmat & Co today. Use Contact Us and tell us what you’re switching from, what deadlines are coming up, and what you want to improve. We’ll guide you through the handover and get you set up with a simple, reliable routine going forward.
