Your company
scaled.
Finance didn't.

We build the layer between the books and the boardroom.

Forecasts, runway and board reporting built on reconciled numbers. Run with you, then handed to your finance team.

Book a discovery call See how it works

Build it.Run it.Hand it over.

Cash forecast

Hiring plan

Board pack

Illustrative example

Can we afford
the next hire?

  • Cash reconciled
  • Assumptions visible
  • Decision ready
Three versionsof the cash number, depending on which spreadsheet is open.
Rebuilt for the meetinginstead of run as an operating rhythm.
One personwho knows which number is right and has to defend it to the board. Usually you.

How it works

Better decisions.
Built three layers deep.

Three connected layers, each built on the one below.

  1. 01

    Trusted data

    Ledger, CRM and billing.
    Reconciled, with a named owner.

  2. 02

    Planning & metrics

    A driver-based forecast.
    One definition for every KPI.

  3. 03

    Decision intelligence

    Answers with assumptions.
    Approved by a human.

Every number traces to its source.

Documented from day one. Handed over as one system.

What it answers

See the trade-off.
Make the call.

Clear answers. Visible assumptions. The risks worth acting on.

Illustrative hiring scenario

Can we hire three salespeople and keep 18 months of runway?

The answer

Start with two.

A third hire takes runway below 18 months in the downside case.

2 hiresAbove the runway floor

3 hiresBelow the runway floor

Downside scenario · 18-month minimum

What could change the answer

Collections timing.

Faster collections could create room for the third hire. Test that assumption before committing.

Assumptions to test

Sales ramp · Churn · Collections

A decision with its assumptions attached.
What you receive

What the function produces. Not a plan to make one.

Four things a board, an investor and your first finance leader actually use. Each one comes from the same maintained system, so it can survive a second question.

Driver-based forecast

Revenue, opex and cash move from named drivers, with base, downside and tripwires. Defend any number to the board.

HiringGrowthCosts Cash outlook BaseDownside Today12 months

Board-ready metrics

ARR, retention, margin and runway with one definition and one owner each.

MetricSource-linked ARRRetentionRunway BillingCustomer cohortsCash + forecast One definition. Named owner.

Monthly cadence

Close, forecast refresh and board pack on one calendar. Runs without you.

01020304 CloseRefresh forecastReview driversBoard packMonthly

Governed workflows

Drafts stay behind a named human. AI speeds the work, it never owns a number. Nothing ships without approval.

SOURCE-LINKED · REVIEWED · LOGGED Source dataAI draftHuman reviewRelease Revise

How we work

Numbers you can trust.
Decisions you can defend.

Know where cash is going, what changed, and what you can afford next.

Your finance systemFoundation

Start with numbers that tie out.

  • Cash view

    Cash reconciled to the ledger and bank.

  • Driver-based forecast

    Hiring, growth and costs connected to cash.

  • KPI definitions

    One definition and named owner for each metric.

  • Source mapping

    Every output linked to its underlying records.

Reconciled sources. Named drivers. Clear ownership.

Build it. Run it. Hand it over.

A documented system your finance team can own.

The handoff

A finance function.
Ready to become yours.

The models, reporting, controls and context. Together.

  • Decision models

    Forecasts, scenarios and cash planning

  • Trusted metrics

    Definitions, sources and named owners

  • Reporting rhythm

    Monthly reviews and board materials

  • Controls & workflows

    Approvals, exceptions and review history

  • Business context

    Assumptions, decisions and working knowledge

Your finance lead

One system to own.

Documented. Walked through.
Ready to run.

Working sessions and overlap carry the context across.

We hand over when your team can run the cycle.

Keeping Arca on is your choice.

Right for you if

  • Funded B2B SaaS that has outgrown founder-run finance.
  • A board, raise, runway call, hire or price change has a date on it.
  • Accounting exists. Nobody owns the forward view.
  • You want to own the function at the end, whether or not Arca stays on to run it.

Not what Arca does

  • Bookkeeping, tax, audit or transaction accounting.
  • Valuation, legal, cap-table or regulated capital raising.
  • An outsourced finance department you never get to own.
  • A dashboard install with nothing else changing.
Questions

The things founders ask before the call.

Already have a CFO?Arca builds the operating layer under their direction. Run a fractional CFO practice?Arca builds the function. Your practice runs it.
Do we have to replace our tools?

No. Arca builds across your accounting system, billing, CRM and spreadsheets. What changes is the definitions, connections, controls and cadence around them.

We have a bookkeeper. Does Arca replace them?

No. Accounting closes the past. Arca builds what sits on top: the forward view, the decision support, the board rhythm. We work with your accounting provider, not around them.

Will we become dependent on Arca?

No. The build is designed around the handoff. Documentation, role definition and ownership transfer are part of the work from week one. Success is your team being able to run the function without us, whether or not you choose to keep us.

What happens after the handoff?

A short, defined overlap once the permanent owner starts: history, definitions, open exceptions, the first cycle together. After that, Arca stepping back is the default. Anything beyond it is agreed on its own terms, never assumed.

Can Arca stay on longer?

Yes. Some companies keep Arca running the cadence, or working alongside their finance lead, well past the build. That is available and agreed separately, with the system already documented and yours. It is an option you choose, not the default and never a condition.

Where does AI fit?

As a build tool, not the product. Faster reconciliation, documentation and analysis, with visible approvals and a named owner on every number. Nothing you rely on depends on a model's judgment in place of a defined process.

How long does it take?

It depends on the state of the numbers and how many cycles the system needs before it is reliable. Scoping produces a plan with a defined end. We do not quote a duration before seeing the company.

The ask

Bring the decision you cannot afford to get wrong.

30 minutes with a senior Arca finance lead. One live hiring, pricing, runway or growth decision. We pressure-test how it is framed, show you where we would look first, and tell you honestly whether Arca is the right fit or someone else is.

Book a discovery call

The call does not promise the answer, a model, or free analysis. It shows you how Arca thinks.

1
Meet, 30 minutesOne decision on your desk. No prep, no files.
2
We pressure-test itWhat would make the answer defensible, and the first blind spot.
3
A straight answer on fitA scoped proposal with a defined end, or a pointer somewhere better.