Which Accounting Tasks to Outsource

The week your finance function stops scaling

Month-end takes eleven working days. Supplier statements remain unreconciled. The controller starts every morning coding invoices and searching for approvals instead of reviewing cash, margin and exceptions. By the time the management figures arrive, the decisions they were meant to inform have already been made.

Accounting back office support can remove preparation work from a constrained finance lead, but only if the business draws an authorisation line first. Preparation, coding, matching, chasing and schedule building can move to a trained external team. Approval, payment release and final sign-off should remain with named people who have authority inside the business.

That boundary matters more than the supplier’s location or job title. A provider offering to approve new suppliers and release their payments is not removing an inconvenience. It is removing a control. The goal is a faster, cleaner close in which review receives more attention—not a finance function that nobody inside the company can supervise.

Draw the authorisation line first

Segregation of duties means dividing incompatible parts of a transaction so one person cannot create, approve, pay and conceal it without another check. The US Government Accountability Office’s current 2025 Green Book is written for federal agencies, not as a private-company accounting rule, but its control principle is useful: management should separate incompatible duties where possible and design alternative controls where separation is impractical.

For a small finance function, use four columns:

1. Prepare: collect the source, enter or organise it and apply an agreed rule.
2. Review: check completeness, accuracy, exception handling and supporting evidence.
3. Approve: accept the transaction or change under a defined authority.
4. Release: move money, file a return, post a controlled journal or make the action irreversible.

An external team can prepare and, in some scopes, perform a first review. Approval and release should remain separate, with thresholds and named internal owners. When a company is too small to allocate four people, the answer is not to ignore the conflict. Use compensating review: an owner may inspect evidence, exception reports and bank activity after another person prepares the work.

Document the line in the procedure and enforce it through system permissions. A written statement that one person “must not approve” is weak when the same login still allows it.

The accounting tasks that delegate cleanly

Purchase invoice capture and coding

The external team collects invoices from the agreed source, checks required fields, identifies duplicates, attaches evidence and applies the chart-of-accounts or coding matrix. Good output is a complete draft transaction plus a clear exception queue—not a guess posted to make the inbox empty.

Supplier statement reconciliation

Match the supplier statement to the payable ledger, identify missing invoices, unapplied credits and disputed items, then send a documented difference list. The provider can request copies through the approved channel; it should not create or approve a supplier identity.

Bank reconciliation preparation

Use a read-only feed or exported statement to match known transactions, list timing differences and flag unknown items. Final review remains with someone who understands the business and did not initiate the underlying payments.

Expense claim checking

Check receipts, dates, categories, arithmetic, policy conditions and duplicate submission. Route exceptions to the authorised manager. A support team can apply the policy; it should not waive it for a senior employee.

Sales invoice raising and dispatch

Create invoices from approved contracts, orders or milestone evidence, apply agreed tax treatment supplied by the business or adviser, send through the named system and maintain an issue log. Changes to price, customer terms or tax rules need internal authority.

Credit-control chasing

Send scheduled reminders, maintain promise-to-pay notes, reconcile replies and escalate disputed or high-risk accounts. The external team should not agree a settlement, extend credit or threaten legal action without authority.

Payroll input preparation

Compile approved hours, leave, starters, leavers and authorised changes for the payroll owner or provider. It does not replace payroll calculation, employment advice, statutory filing or final payroll approval. Use a dedicated payroll support guide for that boundary.

Month-end schedule preparation

Update reconciliations, prepaid and accrual support, aged balances and agreed close checklists. The controller reviews judgements and signs off the close.

What a task needs before it can be handed over

Every task needs a written procedure, a worked example, a definition of complete, an exception route and a named escalation owner. Include where the source arrives, the deadline, system permissions and evidence retained. Untidy work does not become controlled because it moved to another company.

The tasks that should not leave the business

• New supplier approval: confirm that the supplier is genuine, needed and authorised before it can receive payment.
• Supplier bank-detail changes: verify through a known contact route independent of the change request.
• Payment-run approval and release: keep preparation separate from the person who authorises funds to move.
• Credit-note approval above a defined threshold: prevent a preparer from removing a receivable without review.
• Journal approval: separate preparation from the person accepting a material or judgemental ledger change.
• Final review before filing or distribution: the responsible internal owner confirms the record and obtains advice where required.

Supplier bank-detail fraud shows why the boundary matters. A criminal impersonates a real supplier and asks the company to redirect future payments. If the same person receives the email, edits the master record and releases the payment, the false instruction can move through without an independent challenge.

The UK’s National Crime Agency advises businesses receiving a bank-detail change to verify it with the supplier through established contact information and to limit who can change payment arrangements. See its official mandate-fraud guidance. Do not call the phone number in the suspicious message; retrieve a previously verified route.

Access, systems and evidence

Give every contributor an individual account. Shared logins remove attribution, make permissions hard to revoke and weaken an investigation. Assign the lowest role that can complete the task. A person preparing a bank reconciliation normally needs statement visibility, not the power to create a payee or release funds.

Store source documents and approvals in a controlled location linked to the transaction. The audit trail should show who prepared, reviewed and approved the item, when each action occurred and what changed. Messaging can alert someone to a decision, but the approval should be recorded where it can be retained and found.

Review access at onboarding, role change and a regular interval. Offboarding removes system, document, password-manager, email and communication access the same day the role ends. Confirm completion rather than assuming that disabling one central account reaches every third-party tool.

Confidentiality is necessary but insufficient. The engagement should define processing roles, authorised systems, security expectations, subprocessors, incident handling, return or deletion and audit cooperation where relevant. This article is operational guidance; the company should obtain accounting, tax, privacy and legal advice for its actual obligations.

What month-end looks like when it works

A controlled close has a calendar, owners and prerequisites. The following rhythm is an example to adapt, not a universal promise:

1. Before close: confirm cut-off, missing source documents, expected journals and unresolved prior-period items.
2. Days one to three: the support team prepares invoice, bank, supplier, customer and schedule work; exceptions have owners.
3. Day four: the controller reviews reconciliations, judgemental entries, material movements and unresolved balances.
4. After review: authorised corrections are posted, the close is signed off and a variance commentary explains decisions rather than restating the numbers.

The dates depend on volume, systems and reporting need. The important part is that preparation finishes early enough for review to be real. A director signing an unexplained pack on the deadline is not an approval control; it is evidence that the close consumed its review window.

Track late inputs, unreconciled accounts, post-close corrections, aged exceptions and repeated blockers. These measures reveal process quality more directly than counting the transactions a support team touched.

Cost, and the comparison people get wrong

Do not compare an outsourced preparation queue with a full-time controller as though they are the same job. The potential saving comes from matching skill and responsibility to the task. Routine capture, matching and follow-up do not need to consume the same hours as judgement, review and decision support.

A complete comparison includes provider fees, setup and documentation, internal review time, software, management, rework, exception volume and the continuing accountant or controller responsibility. An internal hire comparison includes salary, employer costs, recruitment, leave, tools, supervision and the range of work the role can actually perform. No salary benchmark is printed here because location, seniority and date would determine it.

Outsourcing does not solve an absent finance owner, a broken chart of accounts, inconsistent commercial terms or poor source data. A capable provider may expose those issues sooner, but the business still has to make the decisions. Companies with enough stable volume and management may be better served by an internal accounts assistant; small companies with irregular work may need a bookkeeper or accountant rather than a managed team.

The trigger is transaction and exception load, close duration and the cost of stale information—not revenue alone. For the wider departmental decision, see back office outsourcing for small businesses.

How to run a four-week handover without losing a close

Four weeks is a planning pattern, not a promised implementation time. A complex or poorly documented function may need longer. Avoid beginning during year-end, a major system migration or another period when the internal team cannot review the transfer.

Week 1: document the current process

Inventory tasks, volumes, systems, deadlines, owners, approval thresholds, known exceptions and access. Capture one worked example for each material task and identify conflicts in permission.

Week 2: run in parallel

The external team prepares work while the current owner completes the normal process. Compare outputs, record questions and revise the procedure. Do not let parallel work post duplicate transactions.

Week 3: transfer one task family

Move a bounded area such as invoice capture and supplier reconciliation. The internal owner reviews every exception and a risk-weighted sample of routine work.

Week 4: stabilise and decide the next transfer

Review accuracy, timeliness, access, evidence and internal hours still required. Expand only after the first family meets its acceptance conditions. Keep approval and release inside throughout.

If the list is ready, OveliTHub can turn it into a scoped accounting back office support handover. A broader finance admin support service may fit work that sits outside the ledger.