Offshore Support Solutions for Firms & Companies Worldwide
Streamlining your business processes so you can focus on your core operations.
Hand over the time-heavy back-office work, including audit, accounting, payroll, taxation and KPO, to a qualified team in India that works as a seamless extension of yours. You keep control and client relationships. We take the workload off your plate.
Offshore Outsourcing for CPA Firms & Growing Businesses
Running a firm today means doing more with a smaller team. Skilled accountants are hard to find, deadlines keep piling up during busy season, and hiring full-time staff for every task is expensive. This is exactly the problem offshore outsourcing was built to solve.
At Mercurius, we take the repetitive, documentation-heavy work off your desk so your own people can focus on judgement, advisory and clients. Whether you are a CPA firm in the US, an accounting practice in the UK or Canada, or a growing company anywhere in the world, we plug into your workflow and deliver work that is accurate, on time and ready for review.
We are Chartered Accountants by background and one of the few firms in India registered with the PCAOB (USA) and CPAB (Canada). In plain terms, the same standards your clients and regulators expect are the standards we already work on every day.
Why this matters right now: The finance & accounting outsourcing market is set to cross USD 59 billion in 2026, and the US alone is facing a shortage of over 165,000 accountants a year. Firms are no longer outsourcing just to cut costs. They are doing it to keep up with the work.
What You Can Offshore / Outsource To Us?
We focus on five core areas where firms and businesses need the most support. Each one is handled by trained professionals, not generalists.
Book a Free Consultation ↗Audit Outsourcing
We help CPA and audit firms handle the heavy lifting behind every engagement, so your partners can focus on opinions and clients.
- Workpaper preparation and audit documentation
- Substantive testing, tie-outs, reconciliations, and audit schedules
- Financial statement and disclosure review
- Risk assessment, materiality, and audit planning support
- Lead schedules, roll-forwards, and analytical procedures
- PBC/IRL management and audit query follow-up
- Experience with US GAAS, US GAAP, PCAOB standards, and IFRS
- Support for PCAOB and SEC audit engagements
Accounting Outsourcing
End-to-end bookkeeping and accounting that stays clean, current and audit-ready, without you hiring a single extra seat.
- Bookkeeping & Cash Flow Management
- Accounts payable & receivable management
- Bank and credit card reconciliations
- P&L, balance sheet & MIS reporting
- Financial statement drafting & disclosures
Taxation Outsourcing
From routine filings to complex returns, we prepare accurate, review-ready tax work so you never miss a deadline or a deduction.
- Tax return preparation: 1040, 1065, 1120, 1120S & other business returns
- Sales tax, payroll tax & other indirect tax filings
- Tax compliance & regulatory support
- Tax provision and tax workpaper support
- Tax notices, reconciliations & response support
- Federal, state & local tax compliance
- International and cross-border tax compliance support.
- Experience with US, UK & international tax regulations
Payroll Outsourcing
Payroll is easy to get wrong and costly when you do. We run it accurately, on schedule, every cycle.
- Salary processing & gross-to-net calculations
- Statutory deductions & compliance
- Payslips, filings & year-end forms
- Multi-country payroll coordination
Knowledge Process Outsourcing (KPO)
For higher-value, thinking work, not just data entry. Our team supports analysis and decision-ready reporting.
- Management Information System (MIS) reports
- Financial analysis & modelling support
- Tax return preparation & compliance support
- Process re-engineering & automation
Why Firms Choose Mercurius
Trusted by Businesses Worldwide
There are plenty of outsourcing providers. Here is what makes working with us different and why US CPA firms have stayed with us for years.
Chartered Accountants (CAs), Certified Public Accountant (CPAs), Association of Chartered Accountants (ACCAs) and finance graduates trained with US, UK and international standards. PCAOB and CPAB registered.
The India-US time gap means you send work at the end of your day and get it back the next morning. The busy season moves faster.
You keep the client relationship, the review and the final sign-off. We work quietly in the background inside your systems.
Secure access controls, confidentiality agreements and disciplined processes. Client data security is treated as non-negotiable.
Firms typically save 25-50% versus hiring in-house, while quality and turnaround actually improve.
Add capacity for tax season or a big audit, then scale back. No long hiring cycles, no idle payroll.
No two firms work the same way. We tailor our services, team and workflow to fit your exact business needs. Pick one service or all five.
Who We Support
CPA firms, accounting practices and growing businesses worldwide.
Most of our work is with CPA firms and accounting practices across the US, UK, Canada and Australia, and it is the work we know best. When your busy season hits, staff are stretched, or you simply can’t hire fast enough, we step in as your offshore team and clear the backlog: audit, accounting, tax preparation, bookkeeping and payroll, all done to the standards your clients and regulators expect.
We are especially strong in audit (including Funds, Broker-Dealers, Issuers, 401(k) / Employee Benefit Plans, U.S. GAAP audits, and audits supporting crowdfunding offerings), backed by years of hands-on PCAOB and AICPA audit experience. You keep the client relationships and the final sign-off. We handle the heavy lifting behind the scenes.
Not a CPA firm? That’s fine too. We also support small and medium businesses and growing companies worldwide that want reliable accounting, payroll and tax help, without building a full in-house finance department.
AI + Our Professionals:
The Best of Both
In 2026, over 73% of accounting firms use AI, and the smartest setups cut manual data entry by up to 80%. We put that speed to work for you. AI handles the repetitive parts, and our qualified accountants handle the judgement. You get faster turnaround and fewer errors, without ever losing the human review your clients trust.
Faster turnaround
Bookkeeping, reconciliations and tax prep that used to take hours now take minutes, and accuracy goes up, not down.
Lower Cost
AI lets the same team handle far higher volumes without adding headcount, which keeps your costs down and your turnaround quick, especially during busy season.
Fewer errors
Automated checks catch mistakes in reconciliations, invoices and payroll before they reach you.
Cleaner reporting
Real-time insights mean your MIS and financial reports are ready sooner.
Your software, connected
We work inside QuickBooks, Xero, NetSuite and more, so nothing changes on your end.
Simple Onboarding.
Fast Start.
Most clients are up and running within a couple of days.
We talk through your needs
Understand your firm, software and workload
A short call to understand your firm, your software, and the work you want to hand off.
We build your dedicated team
People matched to your work and process
We get people matched to your work in accounting, audit, payroll, tax or KPO, and train them in your process.
We plug in our AI-led process
Automation + human review for faster delivery
Our team pairs with AI tools to automate repetitive work such as data capture, matching, and reconciliations, so your files come back faster and cleaner every time.
We start with a pilot
Start small and validate quality
We begin with a small batch of work so you can see the quality and turnaround before scaling.
We scale as trust grows
Expand capacity at your pace
Once you are comfortable, we expand capacity and take more off your plate, at your pace.
Our Clients
Tell us what support you need.
Share a few details about your firm, workload and the support you are looking for. Our team can then understand the requirement and take the conversation forward.
Take the Back-Office Load Off Your Plate
Tell us what’s slowing your team down. We’ll show you exactly how outsourcing it to Mercurius can save you time, money, and stress, starting with a no-obligation conversation.