ACCOUNTING GUIDE · UPDATED AUGUST 2026
How to change accountants in Singapore (without missing a filing)
Most owners who are unhappy with their accountant stay unhappy for another year — not because the service improves, but because switching feels risky. Here is the honest version from the receiving end: the handover is a short, well-worn process. Two letters, a records list, and three system updates. The riskiest option is not switching; it is staying with a firm that has already shown you it misses deadlines.
THE SIGNS
When it is time to move.
Nobody switches over one bad month. These are the patterns that, in our experience of taking companies over from other firms, do not fix themselves.
IRAS or ACRA told you about a deadline first
A penalty letter arriving before a reminder ever did is the clearest signal there is. Deadline tracking is the baseline of the service, not a premium feature.
Every invoice is a surprise
The quote was one number; the bills are another. Out-of-scope charges appear without warning, and you have stopped asking questions because each one seems to cost money.
Questions take weeks
You chase, then chase again. During filing season the silence gets longer, not shorter — which is exactly when you need the opposite.
You cannot see your own numbers
The books live in the firm's software under the firm's login, and you get a PDF once a year — after the year is already over. Those are your records, not theirs.
The work arrives at the deadline, not before it
Everything is technically filed, but always in the last week, with no time to review the numbers or plan around them.
One is an irritation — two is a pattern
Patterns do not fix themselves in Q4. If two or more of these describe the last twelve months, the relationship has already ended; only the paperwork is pending.
TIMING
When to switch.
The folk wisdom says wait until after year end. The cleanest handover point is actually just after a filing cycle completes — Annual Return and tax return filed, so the new firm starts from a closed year and a clean opening balance. But do not treat that as a rule. If the current firm is the reason deadlines are being missed, waiting for a tidy handover date adds another year of the problem. A mid-year switch means the new firm takes over a part-finished year — routine work for any firm that onboards regularly. With the 30 November deadline ahead, a September switch still leaves comfortable time, provided the books are not badly behind. And if they are, that catch-up work exists whether you switch or not; the only question is who you trust to do it.
THE PROCESS
The handover, step by step.
Seven steps, most of them done by the incoming firm. The parts only you can do: the notice letter, the CorpPass update, and deciding to start.
Re-read your letter of engagement
Check three things: the notice period (commonly a month), how fees already billed or work in progress are handled, and exactly what the firm was engaged for — accounting only, or also corporate secretary, registered office, tax agent and payroll. That scope list becomes your handover checklist.
Appoint the new firm; let them request professional clearance
An ISCA-member firm writes to your outgoing accountant asking whether there is any professional reason not to accept the appointment. This is standard etiquette under the ISCA ethics code, not an accusation — and it doubles as the trigger for the records handover. It happens accountant-to-accountant; you do not manage the exchange.
Give notice in writing — briefly
Two or three sentences: you are moving your accounting work, the effective date, and please cooperate with the incoming firm's handover request. No justification needed. Settle genuinely outstanding fees — a firm can hold its own working papers over unpaid bills, and there is no reason to give the handover that friction.
Collect the handover file
Your records belong to the company, not the firm. The full list is below — agree it with the outgoing firm before the final invoice is paid, so nothing has to be chased after the relationship has fully ended.
Update CorpPass
Authorise the new firm for the IRAS e-services they will file under — corporate tax, GST and payroll reporting as applicable — and remove the old firm's access. Until this is done, filings and IRAS correspondence still route through people who no longer act for you.
Move the corp sec and registered office, if the old firm held them
The new secretary's appointment and any registered-office change are filed with ACRA through BizFile. The secretary's office cannot be left vacant for more than six months, and a registered-office change must be filed within 14 days — schedule this step rather than letting it sort itself out.
Transfer the accounting software subscription
If the books sit in Xero or QuickBooks under the firm's subscription, have the ownership transferred — not exported and rebuilt. You keep the transaction history, bank feeds and audit trail. If a transfer is genuinely impossible, insist on a full backup export before access ends.
THE HANDOVER FILE
What to collect before the last goodbye.
IRAS requires records to be kept for at least five years, and that obligation sits with the company — which is exactly why this file must come to you, wherever the bookkeeping happens next.
Financial statements and tax records
Signed financial statements for every completed year, tax computations, filed returns and the IRAS Notices of Assessment that go with them.
The ledgers behind the statements
The closing trial balance and general ledger for the last completed year — the opening position the new firm builds on.
Asset and carry-forward schedules
The fixed asset register, capital allowance schedules, and any unutilised capital allowances, losses and donations carried forward. Losing these loses real tax value.
Statutory records
Registers, minutes and resolutions, if the firm also acted as corporate secretary. These are the company's records regardless of who maintained them.
GST, payroll and CPF
GST workings and filed F5 returns if registered; payroll records, IR8A submissions and the CPF payment history.
Anything open with IRAS or ACRA
Queries, objections, instalment plans, extension requests — the correspondence a new firm must know about on day one, not discover at the deadline.
PITFALLS
The three mistakes that make switching painful.
Waiting for a mythical quiet moment
The quiet moment never comes; a missed deadline usually does. If the service is broken, the best time is now, and the second-best is immediately after the next filing.
Leaving the old firm inside your systems
The engagement ends but the firm stays as registered office, CorpPass tax agent and software owner. Every one of those is a dependency on people no longer paid to care.
Paying the final invoice before the file is complete
Settle what is owed — but sequence it: records list agreed, file delivered, then the last payment. Chasing documents after the relationship has ended is much harder.
Common questions.
Can I change accountants in the middle of the financial year?
Yes. The new firm takes over from the last closed period and completes the year. Mid-year onboarding is routine for firms that regularly take on transfers; the only real cost is a short overlap while the handover file moves. With the 30 November tax deadline ahead, a September switch still leaves comfortable time if the books are not badly behind.
Will I be charged twice during the handover?
You pay the outgoing firm for work actually done up to the handover, per the engagement letter, and the new firm from takeover. Reputable firms do not charge for receiving a handover — ask the incoming firm to confirm that in the quote.
Who owns my accounting records?
The company does. Source documents, financial statements, statutory registers and filed returns must be handed over. The firm's own working papers are the firm's property, and some firms hold those until fees are settled — one more reason to pay undisputed bills promptly.
What if my accountant is also my corporate secretary?
Both roles move, but as separate steps: the new secretary's appointment and any registered-office change are filed with ACRA, and the secretary's office cannot be left vacant for more than six months. A firm that provides both services files these as part of onboarding.
Do I need to tell IRAS or ACRA that I changed accountants?
There is no change-of-accountant form. IRAS learns through CorpPass authorisations; ACRA learns through the secretary and registered-office filings, if those change. Update those systems and the notification takes care of itself.
How long does switching accountants take?
With a cooperative outgoing firm: clearance letters within days, the records file within one to two weeks, and the CorpPass, ACRA and software updates alongside. Two to four weeks end to end is typical, and a genuinely urgent deadline can be taken over faster.
Official sources
Engagement-letter terms vary firm to firm; the regulatory mechanics below do not. These primary sources were checked on 20 August 2026.
This guide provides general information, not accounting, tax or legal advice. Notice periods, fee arrangements and lien practices depend on the engagement letter you signed with your current firm; ACRA and IRAS processes described are current as at 20 August 2026.
WRITTEN BY
Jacqueline May
Principal Accountant · Chartered Accountant (Singapore), ISCA member
Jacqueline is a Chartered Accountant (Singapore) and ISCA member, and the Principal Accountant at Synergy Accounting, a Singapore practice established in 2013. She works on corporate tax, GST and ACRA compliance for small and medium businesses — the filings, deadlines and judgement calls most owners would rather hand over. These guides are written from what she sees in practice.