Addition offers outsourced finance solutions for startups and SMEs in the UK and US. Our team of bookkeepers, chartered accountants and former CFOs have worked within multiple companies of all sizes and industries!

Our flexible finance plans start from just £99 a month, and can be customised to suit your business needs - from bookkeeping basics to CFO services when you're ready to level up!

Addition is the finance team you never knew you needed.

Understanding your financials is vital to drive business growth. At Addition, we investigate the numbers behind everything you do, and turn them into targeted insights you can actually use - so you can make informed decisions about your business and act on insight, not hindsight.

Embrace your figures

We give small businesses the financial savvy of big ones - so you can get ahead with your figures, without a head for figures. We cover all the bases – so you can excel, without Excel.

Nurturing numbers

From your first steps as a business, to your first seven-figure year. We're on your team, giving you targeted insights and 1-1 support – until you're so big, you don't need us anymore.

Powered by people

We give finance the personal touch. Like a dedicated bookkeeper who knows all the ins and outs of your accounts, or an experienced CFO who gives you ad-hoc advice whenever you need it. Simply contact us via the in-app chat feature.

We keep on top of your figures, turning data into discoveries that move your business forward. Like checking that new breakfast menu is really paying off, seeing how your customers' habits are changing, or picking the right time to expand.

We cover all the bases – so you can excel, without Excel.

We'll take care of your books, accounts, tax
and (if you want) your whole finance department.
All that from £99 per month.

From your first steps, to your first seven-figure year.

We turn data into discoveries that move your business forward. Like checking that new breakfast menu is really paying off, seeing how your customers' habits are changing, or picking the right time to expand.

We'll stay on top of your numbers,
give you actionable insights and 1-1 support.
Until you're so big, you don't need us anymore.