Accounting · Tax · CFO · Audit support

Precision, in perpetuity.

Pi is an accounting and advisory firm for businesses, accounting firms and families across the United States. We keep the books, file the returns and advise the boards of our clients, with the figures exact, the advice discreet and one partner who knows your affairs.

Every engagement is led by a named partner, and every deliverable is reviewed by a partner before it reaches you.

The Pi emblem: the Greek letter pi encircled by currency and mathematical symbols $Σ£Δ€%¥∞₹√±=÷×−+ π

Built for US businesses

One partner-led team for your books, your returns and your numbers, and for the work that reaches beyond your own office.

United States

For US businesses, CPA firms and families who want a finance function they can rely on, from the monthly books to tax returns and board reporting.

  • Bookkeeping and accounting outsourcing
  • Federal, state and sales tax returns
  • Outsourced tax preparation for CPA firms
  • Virtual CFO and management reporting

Global solutions

For US companies with operations abroad, and for businesses in Pakistan and the Gulf, delivered to the same partner-led standard.

  • VAT, zakat and e-invoicing in Saudi Arabia
  • VAT and corporate tax in the UAE
  • VAT and compliance in Bahrain
  • Accounting and tax services in Pakistan

Our philosophy

Pi never rounds. It holds for every circle ever drawn and will hold for every one still to come. We hold our accounting to the same standard: exact today, and just as sound decades from now.

  • Precision

    Every figure is reconciled and every assumption written down, so your accounts stand up to any auditor, regulator, lender or buyer.

  • Discretion

    Your affairs are known only to the partner and team assigned to you. We do not publish client names, and we never discuss one client's business with another.

  • Permanence

    We plan for the next generation, not the next quarter, and keep records that will still make sense to whoever reads them in twenty years.

How an engagement begins

Every client starts with the same four steps.

  1. A private conversation

    A 30-minute call with a partner to understand your business and what you need.

  2. A short review

    We look at your records, registrations and reporting to confirm the right scope and any clean-up required.

  3. A written proposal

    Scope, timetable and terms in writing, within three business days of the review.

  4. Engagement and onboarding

    A signed engagement letter, then onboarding begins the same week.

Standards you can hold us to

The commitments behind every engagement, written into your engagement letter.

  • Partner review

    A partner reviews every deliverable before it reaches you.

  • Written confidentiality

    Every engagement is covered by a written confidentiality agreement.

  • Encrypted client portal

    Documents move through an encrypted client portal rather than email.

  • Professional indemnity

    We carry professional indemnity insurance on the work we do.

  • Scope in writing

    A written scope and engagement letter are agreed before any work begins.

  • A named team

    A named partner and a dedicated accountant, not a rotating team.

Speak with a partner

Every enquiry is read by a partner and answered within one business day. Meetings are held at our offices, at yours, or by video.