Outsourced Accounting
Firm for Growing US Businesses

Outsourced accounting covers the full range of accounting and operational support your business would otherwise hire internally, including bookkeeping, monthly reconciliations, accounts payable and receivable, payroll processing, tax preparation, reporting, and CFO-level advisory. At Maspartner, the scope is customized to your stage of growth. Early-stage startups usually begin with bookkeeping and tax support, while scaling companies expand into payroll, fractional CFO support, and multi-entity accounting as operations become more complex. 

Pricing depends on transaction volume, number of accounts, and the services required. Most small businesses pay between $300 and $1,200 per month for bookkeeping and basic accounting. Tax preparation is typically priced per return. Maspartner provides a transparent, fixed monthly quote after an initial consultation, ensuring there are no hourly overages or surprise invoices. 

Onboarding starts with a 30-minute discovery call where we understand your business structure, current accounting setup, reporting requirements, and operational priorities. We then assign a dedicated accountant and complete a one-time cleanup or migration of your existing books. Most clients are fully onboarded within 5 to 10 business days, with a single point of contact managing communication from day one. 

Our team is proficient across all major accounting platforms used by US, UK, and Australian businesses, including QuickBooks Online, QuickBooks Desktop, Xero, Sage, MYOB, FreshBooks, and Wave. For tax, we work with ProConnect, Lacerte, Drake, and UltraTax. We work inside your existing tools because we do not force a platform change. 

Yes. Maspartner operates under strict data confidentiality protocols including NDAs for every engagement, role-based access controls, and encrypted data handling. Our AI-driven accounting solutions and intelligent accounting systems are designed to support secure financial workflows, controlled access management, and safer document handling across global operations. We follow GDPR-aware practices for UK and EU clients along with US data protection standards while helping businesses maintain automated financial management processes and access to secure real-time financial insights. Your financial data is never shared, sold, or accessed beyond the team assigned to your account. 

Yes. Our CPAs are licensed to handle federal and state tax preparation and filing for US businesses regardless of where our team is physically located. Remote delivery does not affect accuracy, compliance, or deadlines. We handle individual business returns, corporate tax filings, multi-state tax compliance, and quarterly estimated tax payments. Every filing is reviewed by a CPA before submission. 

Yes. We prepare federal and state tax returns across all US states, including sales tax filings for businesses with multi-state nexus. For international clients, we handle UK self-assessment, corporation tax, VAT, and cross-border compliance for companies operating in the US, UK, Canada, UAE, and Australia. Our team includes tax professionals qualified in multiple jurisdictions. 

Standard monthly financials, such as your profit and loss statement, balance sheet, and bank reconciliation, are delivered within 5 business days of the month close, provided all bank feeds and source documents are connected. For clients requiring faster turnaround, we offer a 2-day close process for an additional fee. Urgent tax filings and deadline-driven deliverables are handled on a case-by-case basis. 

Every Maspartner client is assigned a dedicated accountant and a senior reviewer. You have direct communication with your accountant via email, WhatsApp, or video call, whichever you prefer. Your books are not handled by a rotating team. The same professional manages your account month to month, which means context is never lost between periods. 

Yes. Startups benefit most from outsourced accounting because accounting and compliance requirements change quickly in the early stages of growth. A startup does not need a full-time CFO in month three. Maspartner works with pre-revenue and early-stage companies to set up the right chart of accounts, prepare investor-ready reporting, manage payroll from day one, and maintain tax compliance as the business scales. You pay for the support you need, not a full-time salary. 

Yes. We run Claude’s agentic workflows for first-pass review on your books and filings, Intuit Intelligence to keep transactions categorized correctly, and Jax by Xero to catch reconciliation issues early. A qualified accountant still reviews and signs off on everything before it’s filed.

No. Your data isn’t used to train any third-party AI model, it’s processed in secure, access-controlled environments under strict confidentiality agreements with every tool provider. Access is role-based, so only your assigned team sees your file, and every AI-assisted output is reviewed by a person before it reaches a filing.

A bookkeeper records your day-to-day transactions and keeps your accounts reconciled. An outsourced accounting firm like MasPartner covers that and goes further. We prepare your financial statements, handle tax preparation and compliance, and help you make decisions based on your numbers. When you need it, we also provide fractional CFO support and investor-ready reporting. With specialists in bookkeeping, payroll and tax, you get one team instead of several separate hires.

Yes. You keep full ownership of your QuickBooks or Xero account, and the same applies if you use another accounting platform. We simply join as an authorized user, with access set to match the work in your engagement. You stay in control of who can see and change what.

We’ll get them back on track. Our team reviews your past transactions, reconciles old bank statements and corrects errors until your books are accurate and up to date. From there, we move you onto a regular monthly routine.

Yes. You can keep your CPA for tax filing and leave the monthly work to us. We handle your bookkeeping, reconciliations and month-end close, then send your CPA organized, reconciled financials, so they have what they need well before filing deadlines.