Fractional CFO and back office · San Diego · Booking for January 2027
We close your books every month and send you a 13-week cash forecast every Monday. When a big decision comes up, like a key hire, a price change or a bank loan, you have a CFO at the table. One monthly fee, for owner-led companies doing $1M to $25M a year.
What we do
That gap is where cash surprises come from. Nobody is looking more than a month ahead, so the owner ends up acting as CFO on nights and weekends. We take over that seat, along with the books underneath it.
Clean books every month, plus the invoicing and bill pay that keep them accurate.
You see the tight weeks two months before they arrive, while there is still time to act.
Someone to check the math before you sign the lease, hire the manager or take the loan.
Example · the forecast you get every Monday
Each Monday you get a rolling 13-week view of cash coming in and going out. We mark the lowest week ahead and tell you what we would do about it.
Low point $61K in week 7. Suggested fix: move two customers to net 15 and push one equipment purchase to week 9.
Why the name
In finance, a convex position is one where the losses are capped and the gains are not. We run your finances the same way: enough cash cushion that a slow month stays a slow month, and numbers clear enough that you know when to push. It works best for companies like these.
Pricing
Three-month minimum, then month to month. We don’t prepare tax returns or do audits. Your CPA keeps that work, and gets clean books from us.
| CFO Essentials | Best fit for most ownersConvex Core | Convex Complete | |
|---|---|---|---|
| You have a good bookkeeper. You need someone to tell you what the numbers mean. | $1M–$5M in revenue. We keep the books, and you get a CFO on top. | $3M–$25M in revenue. You hand us the whole back office. | |
| Founding rate: our first five clients pay 25% less for 12 months. In return, we ask to write up the work as a case study. | $2,000 / monthFounding rate $1,500 | $2,500 / monthFounding rate $1,875 | $4,500 / monthFounding rate $3,375 |
| Bookkeeping and monthly close | Your bookkeeper | Closed by the 15th | Closed by the 15th, up to 400 transactions |
| Invoicing and collections | Not included | Included | Included |
| Bill pay and payroll coordination | Not included | Not included | Prepared for your approval |
| Compliance calendar: licenses, sales tax, insurance | Not included | Not included | Included |
| 13-week cash forecast | Weekly | Weekly | Weekly |
| Monthly financial package | Included | Included | Included, with budget |
| CFO meetings | One a month | One a month | Two a month |
| Pricing reviews and lender management | Not included | Not included | Included |
| Ask about Essentials | Start with Core | Ask about Complete |
Two weeks inside your books and bank data. You get the five fixes worth the most money, each with a dollar estimate. The fee is credited toward a plan if you start one.
CFO time without the back office, for a company preparing to raise, borrow, buy another business or sell.
One-off work: a forecast model, a pricing and margin study, a lender package, acquisition diligence or catch-up bookkeeping.
Each plan covers one legal entity. Catch-up bookkeeping, additional entities and unusually high transaction volume are quoted separately. We work from read-only bank access: you approve and release every payment, and we never hold signing authority on your accounts.
How an engagement starts
Bring the money question that’s on your mind. By the end you’ll know whether we can help and which plan fits. If we aren’t the right firm, we’ll say so.
We get read-only access to your books and bank, catch up anything that’s behind, and find the fixes worth the most money.
Books closed by the 15th and a new forecast every Monday. You get a standing CFO meeting each month (two on Complete), and when something comes up between meetings, an answer that week.
Founder Track
For pre-seed and seed founders who need numbers an investor will trust, before they can pay for a CFO. You get clean books, burn and runway, a financial model, investor updates and a monthly CFO meeting. The cash fee is 70% below our Core plan. The equity is only worth something if your company is.
Apply for Founder TrackBy application, and never more than four companies at a time. We don’t raise money for you, and nothing we charge depends on how much you raise.
Who you work with
I run treasury and FP&A for a large company with cash spread across dozens of legal entities. I’m also CFO and co-owner of a San Diego catering company, so I know what a cash gap feels like on a Friday afternoon. Most of those gaps could have been seen eight weeks out.
Bookkeeping is done in-house by our own staff, on systems I set up and check. The analysis is mine, and I’m the one in your meetings.
“If I can’t explain your numbers to you in plain English, I haven’t done my job.”
Get in touch
I’m booking engagements that start in January 2027. Email me a few lines and I’ll reply within one business day with times to talk. It helps to include: