For fractional operators & finance leaders
Run your practice.
Engagement by engagement.
You are a fractional COO, CFO, or bookkeeper with several clients at once. Wrenbase runs your practice: bill each engagement, track the money in and out, and keep a clean ledger per client, all in one place.
Your practice
3 engagements · March
Meridian Consulting
Retainer · monthly
$8,000
Paid
Northwind SaaS
Hourly · March
$3,250
Sent
Harborline Co
Project fee
$5,500
Draft
Each client, its own clean record.
Billed
$16,750
Your practice, structured
Several clients. One clean place to bill them all.
One practice, several engagements
Each client you run is its own engagement with its own retainer, its own invoices, and its own clean record. No re-keying between them.
Bill the way each client agreed
Monthly retainer for one, hourly for another, a flat project fee for a third. Set the cadence per engagement and it sends itself.
A ledger you can hand over
Every invoice, payment, and vendor bill is logged per engagement. When you wrap or hand off, the record is already clean.
Straight about scope
What Wrenbase does for you today.
Today Wrenbase runs your practice: your engagements, your billing, your ledger. Each client is a clean, separate record you can bill on its own terms and hand over when the work wraps.
Running money inside each client's own books, as if you were their finance team on their platform, is something we are building toward. We will say so clearly here when it is ready. For now, if you bill clients for fractional work, this is built for you.
Common questions
What fractional operators ask.
- How does Wrenbase fit a fractional practice?
- You run a practice with several clients. Each client is an engagement with its own fee, invoices, and ledger. Wrenbase gives you one place to bill every engagement, track what came in and what went out, and keep a clean record per client, instead of a spreadsheet per client.
- Can I bill different clients on different terms?
- Yes. One engagement is a monthly retainer, another is hourly, another is a flat project fee. Set the mode and schedule per engagement. Recurring invoices send themselves; reminders escalate in your tone if a client runs late.
- Do I get a separate view per client?
- Yes. Each engagement is a project with its own live P&L: what you billed, what you collected, and any costs you passed through. Roll them up to see the whole practice, or drill into one client.
- Can Wrenbase run the books inside my clients' own companies?
- Today Wrenbase runs your practice: your engagements, your billing, your ledger. Running money inside each client's own books is something we are building toward, and we will say so clearly here when it is ready. For now, if you bill clients for fractional work, that is exactly what fits.
- Can I bring my current client list in?
- Yes. Wrenbase imports clients, invoices, and transactions from CSV, so a practice you run on spreadsheets today moves across cleanly.
Built for
Operators who run several engagements at once.
Projects · The organizing layer
Know what each engagement actually made.
In Wrenbase, every engagement is a project.
Each engagement is a project with its own live P&L: what you billed, what you collected, and any costs passed through, per client.
Riverside Brand Shoot · Overview
on trackProfit margin
60%
Outstanding
$1,000
Budget
$14.6k left
Cash timeline, next 6 weeks
Weeks 1-2 run cash-negative before Acme's payment lands in week 3. Consider nudging invoice #4.
Bill every engagement
from one practice.
Start free. Add your first client and set its terms in minutes.