Outsourced Accounting Services in Singapore: A Complete Guide

By Lucas Seah, Founder of Excellence Singapore Group | Last Updated: June 2026

Outsourced accounting in Singapore means handing your bookkeeping, financial statements, GST returns, and corporate tax filing to an external firm that does the work for a monthly or annual fee, instead of hiring an in-house finance team. For most small and mid-sized companies it costs a fraction of a single salary, keeps you compliant with IRAS and ACRA, and frees the owner to run the business.

This guide explains exactly what an outsourced accounting service does, the statutory obligations it keeps you on top of, what it typically costs versus hiring in-house, how the first month of onboarding works, and how to choose a provider you can trust.

Key Takeaways

• Outsourced accounting covers bookkeeping, management accounts, unaudited financial statements, XBRL, GST returns, and corporate tax filing, with payroll usually available as an add-on.
• Every Singapore company must keep proper accounting records for five years (Companies Act s.199) and meet a fixed calendar of IRAS and ACRA deadlines, which is the core of what the service manages.
• Outsourcing typically costs roughly S$1,000 to S$10,000 per year, against S$55,000 or more to employ one accountant with CPF and overheads.
• A good provider is a registered Corporate Service Provider, works on cloud software such as Xero, and gives you a named contact, not a ticketing queue.
• The best time to outsource is at incorporation, when you register for GST, or when manual bookkeeping starts causing late filings.

What Are Outsourced Accounting Services?

An outsourced accounting service is an external firm that maintains your company’s financial records and handles its statutory filings, so you do not need a salaried accountant on payroll. The firm records your transactions, reconciles your bank accounts, prepares your financial statements, and files your returns with the Inland Revenue Authority of Singapore (IRAS) and the Accounting and Corporate Regulatory Authority (ACRA). You keep full ownership of your numbers and your decisions; the provider does the production work and the compliance.

This is different from buying accounting software. Software such as Xero or QuickBooks is a tool; someone still has to operate it, classify the transactions correctly, and sign off the filings. Outsourcing gives you the tool and the trained person. If you are weighing the two, our guide to the best accounting software for Singapore SMEs pairs naturally with this page.

What Is Included in an Outsourced Accounting Service?

Scope varies by provider and package, but a full outsourced accounting service in Singapore typically covers the following.

• Bookkeeping: recording sales, purchases, and expenses, and reconciling bank and credit card accounts every month or quarter.
• Management accounts: a profit and loss statement and balance sheet so you can see how the business is performing between year ends.
• Unaudited financial statements: the year-end statutory accounts prepared under the Singapore Financial Reporting Standards.
• XBRL conversion: formatting the financial statements for ACRA filing where required.
• GST returns: preparing and e-filing your quarterly GST F5 if you are GST-registered.
• Corporate tax: computing and filing your Estimated Chargeable Income and the annual Form C-S, C-S (Lite), or C with IRAS.
• Payroll (add-on): monthly salary processing, CPF, and IR8A, often bundled with the accounting. See our payroll services guide for what that covers.

The two foundational layers are bookkeeping and accounting, and they are not the same job. If you are unsure which your company actually needs, read our explainer on bookkeeping vs accounting.

The Statutory Obligations Your Provider Manages

The real value of outsourcing is that someone owns your compliance calendar. A Singapore company faces a fixed set of deadlines every year, and missing them carries penalties. These are the obligations a competent provider tracks for you.

• Keep accounting records for five years. Under Companies Act 1967 section 199, your records must sufficiently explain your transactions and financial position, and IRAS separately requires you to retain records for five years from the relevant Year of Assessment.
• File ECI within three months of your financial year end, unless you qualify for the waiver, which requires both annual revenue of S$5 million or below and a nil ECI, per IRAS rules on Estimated Chargeable Income.
• File GST returns one month after each accounting period, usually quarterly, as set out in the IRAS GST filing due dates. If you are not yet registered, see our GST registration guide.
• File your corporate tax return by 30 November each year. IRAS sets the corporate income tax e-filing deadline at 30 November, with Form C-S (Lite) for revenue up to S$200,000 and Form C-S for revenue up to S$5 million.
• Hold your AGM and file your annual return on time. A private company holds its AGM within six months of its financial year end and files its annual return with ACRA within seven months, per ACRA’s due-date rules. The secretarial side of this is covered in our corporate secretarial services guide.
• File financial statements in XBRL where required, and check whether you even need an audit. Many small companies qualify for an exemption; see our pages on XBRL filing and audit exemption.

The chart below shows how these deadlines fall across the year for a company with a 31 December financial year end.

In-House vs Outsourced: The Cost Comparison

For most SMEs the decision comes down to cost and reliability. Hiring an in-house accountant means a salary, employer CPF, paid leave, software licences, and the risk that compliance knowledge leaves when the person does. A full-time accountant in Singapore earns roughly S$4,200 to S$5,200 a month, which is about S$55,000 to S$75,000 a year once you add CPF and overheads. An outsourced service for a typical SME runs roughly S$1,000 to S$10,000 a year depending on transaction volume and scope.

The gap is large because one outsourced team spreads its cost across many clients, while an in-house hire is a fixed cost you carry alone. For a deeper look at the trade-offs, including the cases where in-house does make sense, read our comparison of outsourcing vs in-house for accounting and payroll. We break the fees down by company profile in our accounting services cost guide.

How Outsourcing Works: Your First Month

A common worry is that handing over the books will be disruptive. In our experience a clean onboarding takes a few weeks and follows a predictable path.

• Week 1, handover: you grant view access to your bank feeds and accounting software, and share prior-year accounts, your GST status, and your financial year end. The provider runs know-your-client checks, which a registered firm is required to do.
• Week 2, setup and catch-up: the firm sets up or cleans your chart of accounts, connects bank feeds, and brings any backlog up to date so your starting position is accurate.
• Week 3, first reconciliation: the first month or quarter is reconciled and a first set of management accounts is produced, so you can see the numbers and flag anything unusual.
• Week 4 onward, steady state: a recurring cycle begins, with monthly or quarterly bookkeeping, GST returns when due, and a clear calendar for the year-end statements and tax filing.

From there, most of the work is invisible to you until a report or an approval is needed. That predictability is the point.

How to Choose an Outsourced Accounting Provider

Not all providers are equal. A few checks separate a safe choice from a risky one.

• Registered and qualified. If the firm also offers company secretary or incorporation services, it must be a registered Corporate Service Provider with ACRA. Ask who signs off your filings and what their qualification is.
• Cloud-based. A modern provider works on Xero, QuickBooks, or similar, so you can see your numbers any time rather than waiting for a spreadsheet.
• Clear scope and pricing. Know what the monthly fee covers and what is charged extra, such as GST registration, payroll, or a high volume of transactions.
• A named contact. You want a person who knows your account, not a fresh ticket each time.
• Compliance track record. The firm should keep current with rule changes such as the corporate tax filing season and the GST e-invoicing roll-out.

If you would rather compare firms than read about the service, see our roundup of the best accounting firms in Singapore and our buyer guide on how to choose an accounting firm. For the broader compliance picture, our accounting compliance guide sets out what every business needs to cover.

When Should You Outsource Your Accounting?

Three moments are the natural triggers. The first is at incorporation, when setting up clean books from day one is far easier than fixing them later; many owners arrange accounting when they register the company. The second is when you register for GST, because quarterly returns add a real compliance burden. The third is when manual bookkeeping starts causing problems, such as late filings, a scramble at year end, or no clear view of cash flow. Even a dormant company still has filing obligations, so the question is rarely whether you need accounting, only who should do it.

Frequently Asked Questions

What does an outsourced accounting service actually do?

It maintains your books and handles your statutory filings. That usually means monthly or quarterly bookkeeping and bank reconciliation, management accounts, year-end unaudited financial statements, XBRL where required, GST returns if you are registered, and your ECI and annual corporate tax filing with IRAS. Payroll is commonly available as an add-on.

Is outsourcing accounting cheaper than hiring an accountant?

For most small and mid-sized companies, yes. An in-house accountant costs roughly S$55,000 to S$75,000 a year once you include CPF and overheads, while an outsourced service for a typical SME runs roughly S$1,000 to S$10,000 a year. In-house only tends to pay off at higher transaction volumes or where finance is a core function.

Will I lose control of my finances if I outsource?

No. You keep ownership of your bank accounts, your data, and every decision. The provider operates your cloud software and prepares your filings, but you review and approve. Good providers give you live access to your accounts so you can see your position at any time.

Do I still need accounting if my company is dormant?

Yes. A dormant company has reduced obligations but still has to file an annual return with ACRA and, in most cases, a tax return or a waiver application with IRAS, and it must keep proper records. The work is lighter, which is why dormant-company packages are inexpensive.

Does my outsourced provider need to be licensed?

If the firm provides corporate secretarial or incorporation services by way of business, it must be a registered Corporate Service Provider with ACRA. For accounting and tax work specifically, ask who signs off your filings and confirm their qualification, such as a Chartered Accountant of Singapore.

How long does it take to switch to an outsourced provider?

A clean handover usually takes about three to four weeks: access and know-your-client checks in week one, software setup and backlog catch-up in week two, a first reconciliation and management accounts by week three, then a steady monthly or quarterly cycle. Switching is easiest at the start of a new financial year.

Talk to Us

Your accounting should run quietly in the background while you build the business. Excellence Singapore provides outsourced accounting services for Singapore SMEs, from bookkeeping and GST to year-end statements and corporate tax, all handled by a qualified team that keeps your filings on time. Talk to us and we will take the numbers off your plate.