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Tilitoimiston vaihtaminen: when and how to switch safely

August 28, 2026
Tilitoimiston vaihtaminen: when and how to switch safely

Switch your accounting firm when errors, missed filings or slow replies become the norm rather than the exception, not before you have a real plan in place. Handled correctly, a switch keeps your books continuous with barely a ripple in reporting. Before you contact a new firm, gather three things: a written list of the services you need, your most recent closed accounts, and a checklist of who currently has access to what.

TL;DR:

  • Ensure your documents and access rights are complete and verified before initiating a switch to prevent data loss or delays.
  • Plan the timing of the transition around your financial year-end to minimize complications and split risks.
  • Reconcile opening balances and confirm final VAT and payroll reports to avoid mismatches that could create errors or penalties.
  • Ask for an itemized handover checklist from the outgoing firm and keep them reachable for a short window to address post-migration issues.
  • Choose a new firm based on their digital tools, response times, sector experience, and clear onboarding process, rather than just lower pricing.

Table of Contents

Why businesses change their accounting firm

Most switches trace back to a handful of recurring problems, not one dramatic failure. If your bookkeeper keeps mislabelling transactions, or you're fielding your own VAT queries because nobody caught them first, that's a pattern worth acting on.

Watch for these signals in particular:

  • Repeated bookkeeping errors that force you to double check figures yourself
  • Missed or late palkanlaskenta (payroll) runs that leave staff paid incorrectly or late
  • VAT returns filed late or incorrectly, risking penalties from the Tax Administration
  • Billing that changes month to month with no clear explanation
  • Slow replies to emails or calls, especially around filing deadlines
  • No electronic bookkeeping tools: no e-invoicing, no bank feed integration, everything still moving by email attachment

Not every problem calls for a full switch. If the firm itself is competent but your assigned accountant isn't, ask to change contact person first. Many Finnish firms accommodate this without friction, and it's far less disruptive than migrating your entire bookkeeping setup to a new provider. Save the full switch for when the problems are structural, not personal.

When is the best time to switch accounting firms?

The cleanest switch happens at your tilikauden vaihde, the turn of your financial year. Opening balances are already settled, year-end tasks are complete, and the new firm starts with a blank page rather than a half-finished ledger. Advisers commonly recommend preparing your account closing materials and initiating the move before that year-end closes, which avoids splitting one financial year across two providers.

A mid-year switch is riskier but manageable if you plan for it. Agree explicitly who handles any pending VAT period or payroll run that falls across the transition, and get that in writing from both firms before you commit to a date.

On timing, expect:

  • A straightforward switch with matching software: roughly 2 to 4 weeks
  • A more complex handover, or one needing document reconstruction: closer to 1 to 2 months

Timelines reported by Finnish accounting firms generally fall between 2 and 8 weeks, with the deciding factors being how complete your documents are and whether the outgoing and incoming firms use compatible systems.

How do you actually carry out the handover?

Run the switch as a sequence, not a single event. Skipping a step here is exactly how businesses end up with a missing VAT period or a payroll run nobody owns.

  1. Prepare. List the services you currently use and the ones you want going forward. Pull your last closed accounts, trial balance, general ledger and payroll summaries together in one place.
  2. Give notice. Send written notice per your existing contract and agree a final service date. Get the final invoice and any outstanding tasks confirmed in writing so nothing lands on you unexpectedly afterwards.
  3. Set access. Grant the new firm valtuudet in MyTax along with the user rights it needs in your accounting software and bank connections. Only revoke the old firm's access once you've confirmed the new firm can see everything it needs.
  4. Transfer the data. Export ledgers, receipts, attachments and any accounting data your outgoing firm holds. Confirm the file formats can actually be imported into the new system before you rely on them.
  5. Verify. Check the opening balances match, and reconcile one recent month in parallel between old and new records. Confirm VAT and payroll reporting will continue on schedule with no gap.
  6. Close it out. Archive written confirmations from both sides, sign off the handover checklist, and agree a short window during which the old firm will still answer follow-up queries.

Pro Tip: Ask the outgoing firm for an itemised handover list before you agree the final invoice, not after. It's much easier to query a missing item while they're still contractually obligated to respond than once the relationship has formally ended.

What documents and permissions do you need to collect?

Build this list before you approach anyone new. A firm that receives a complete package on day one will onboard you faster than one working from partial records.

Documents to export from your outgoing firm:

  • Trial balance and general ledger
  • Fixed asset register
  • Full VAT filing history for the current and prior period
  • Payroll files and summaries
  • Bank reconciliations
  • Attachment and receipt exports

Permissions to reassign:

  • MyTax valtuudet, transferred to the new firm's named contact
  • Admin rights in your accounting software
  • Bank connection permissions for automated feeds
  • E-invoice operator settings, updated to route through the new firm

Before any of this moves, check whether both firms use the same accounting platform. Matching software between old and new providers cuts out most of the manual export and import work, and it's the single biggest factor in how smoothly attachments and historical data survive the move. Where the platforms differ, plan for a conversion step and test the import on a copy of your data first, never on the live file.

How should you choose the new accounting firm?

Price is the easiest thing to compare and the least useful one on its own. A firm quoting less per month may simply be running more of your bookkeeping by hand, which raises your error risk down the line even if the invoice looks smaller today.

Weigh these criteria instead:

  • Digital tooling: does the firm support e-invoicing, bank feed integration and a modern accounting platform, or is it still working from spreadsheets and email?
  • Response commitments: is there a stated turnaround time for queries, or just a vague promise to "get back to you"?
  • Sector experience: has the firm handled businesses like yours before, including light entrepreneurs, taxi and courier operators, or whatever your specific structure is?
  • Pricing model: fixed monthly fee, hourly billing, or per-transaction pricing, and which fits your volume?
  • Onboarding support: does the firm have a documented process for taking over from another provider, or will you be improvising together?

Ask directly: who will handle my account day to day? Which software do you use, and does it integrate with my bank? What's your typical onboarding timeline for a switch like mine? Can you give me a fixed fee for my recurring services? Do you have a client of similar size and sector you can point to?

Competition-focused guidance from Finnish industry sources is consistent on this point: evaluating a new firm is about capability and communication, not just the number on the quote.

Pro Tip: If a firm hesitates to give you a straight answer on pricing or can't describe its own handover process in specific terms, treat that as a warning sign rather than a detail to chase up later.

Red flags worth walking away from: evasive pricing answers, no references offered, processes that are entirely manual, or no clear plan for the handover itself.

What can go wrong, and how do you prevent it?

The most common failure points are mismatched opening balances, attachments that go missing in the transfer, filings that slip through the gap between firms, and a final invoice that arrives higher than expected.

Mitigate each one directly:

  • Insist on an itemised handover checklist signed off by the outgoing firm before you settle the final bill
  • Reconcile your accounts within the first 30 days of the new firm taking over
  • Keep the old firm reachable for a short, defined query window rather than cutting contact immediately
  • Budget a small contingency for one-off correction work, since some reconstruction is common even in clean handovers

A short parallel verification period, where both firms are technically available for a couple of weeks, catches most issues before they become disputes. Expect a modest one-off migration fee from the new firm in most cases; it's normal and far cheaper than unpicking errors months later.

Finovate's view on switching accounting firms

We see the same triggers repeatedly: a payroll error that hit staff pay, a VAT filing missed at the worst possible moment, or simply months of unanswered emails. In our experience, the businesses that switch cleanly are the ones that prepare their documents before they call anyone. Our onboarding process is built around exactly that, migration support, sector experience across light entrepreneurs and SMEs, and a named contact from day one. If any of the signals above sound familiar, get in touch and we'll walk through what a handover would look like for your business.

— Busayo

How Finovate supports your switch

Finovate is the practical alternative when your current firm can't keep pace with modern bookkeeping. Where a switch stalls on manual processes or unclear pricing elsewhere, we run on digital accounting tools with e-invoicing and bank feed integration built in from the start, so your data moves cleanly rather than getting rebuilt by hand.

Finovate

A typical Finovate handover starts with a documents and access checklist matched to the outline above, moves through a parallel reconciliation period, and settles into your regular reporting cycle within the timelines this guide sets out. For light entrepreneurs and courier or taxi businesses specifically, our accounting package for delivery partners is built around exactly that profile. If you invoice regularly and want a fixed-price package from day one, our monthly invoicing service covers bookkeeping and invoicing together. Get in touch and we'll scope your handover before you commit to a date.

This article is general information, not a substitute for advice from a qualified financial advisor. Consult a qualified financial professional about your own circumstances before acting on anything here.

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