Clear numbers. Brighter tomorrows.

Accounting that moves your business forward

Expert bookkeeping, accounting and advisory services for ambitious businesses. We handle the numbers, so you can focus on what you do best.

5.0 from 100+ business owners
An advisor at Hartwell & Co. in a bright, modern office, holding a tablet and looking off to the side
  • Your own accountant, not a call centre
  • A reply within one business day
  • A fixed monthly fee, agreed up front
  • Your books, in your name, open to you

Our services

Expert support for every stage of your business.

From day-to-day bookkeeping to strategic advisory, we offer a complete range of services tailored to your goals.

View All Services

Switching accountants

Changing firms is easier than you think.

  1. 01

    We talk

    A free, no-obligation conversation about your business, what your current accountant does and what you would like to change.

  2. 02

    You sign one letter

    We ask your previous accountant for your files and records, with your signed authorisation. They keep working until we say the handover is complete.

  3. 03

    We take it from there

    Your books are set up, checked and reconciled, and your first monthly review is booked. Most businesses are fully moved across within three weeks.

Accounting for a brighter tomorrow

More than numbers — a partner in your success.

At Hartwell & Co., we believe great accounting is about people, not just spreadsheets. Our mission is to give business owners the clarity, confidence and freedom to grow, with expert support at every step.

A client meeting in the Hartwell & Co. office: two advisors and a business owner talking across a table

Real businesses. Real results.

Trusted by business owners like you.

  • Hartwell & Co. has been an incredible partner for our business. Their team is professional, proactive and genuinely cares about our success.
    Sarah MitchellFounder, Bloom & Co.
  • Tax season used to keep me up at night. Now our books are always ready and there are no surprises — just clear, honest advice.
    Daniel OrtegaOwner, Ortega Construction
  • They helped us restructure, cut costs and plan our expansion. It feels like having a CFO on the team.
    Priya ShahManaging Director, Northline Studio
A desk at Hartwell & Co.: a fountain pen on a set of annual accounts, reading glasses and a cup of coffee
Businesses supported
250+
Client retention rate
98%
Years of experience
15+
Average reply time
24h

The people you will talk to

Three names, three direct lines.

Meet the team
  • Portrait of Eleanor Hartwell

    Eleanor Hartwell

    Founder & Managing Partner

    CPA

  • Portrait of Marcus Bell

    Marcus Bell

    Senior Accountant, Tax

    IRS Enrolled Agent

  • Portrait of Sofía Reyes

    Sofía Reyes

    Bookkeeping & Payroll Lead

    QuickBooks ProAdvisor

Questions we hear a lot

Before you switch.

What does it cost to switch accountants?

Nothing extra. We ask your previous accountant for your files with your signed authorisation, and we set up your books ourselves. You pay the same fixed monthly fee we quoted you, from the month we start.

How long does the handover take?

Most businesses are fully moved across within two to three weeks. In the meantime your previous accountant keeps working, so nothing is missed and no deadline slips.

What happens if I am audited?

We prepare the response, attend with you and speak to the authority on your behalf for every return we prepared. Representation is included in our tax planning and accounting fees.

Which software do you work with?

QuickBooks Online and Xero are our standards. If you already use something else we will tell you honestly whether it is worth changing before we start.

Do you work in Spanish?

Yes. Every client has a Spanish-speaking and an English-speaking contact, and this whole site, our reports and your monthly review are available in both languages.

Let's build a brighter tomorrow

Ready to take control of your finances?

Book a free, no-obligation consultation and discover how we can support your business.