The GBS Blog

Bookkeeping, cash flow and fractional CFO strategy for agency owners and e-commerce founders who want to make decisions with real numbers.

2026-10-23 · bookkeeping for marketing agencies

Bookkeeping for Marketing Agencies: The Complete Guide

Bookkeeping for marketing agencies, explained: the chart of accounts, retainer revenue, pass-through ad spend, monthly close and the KPIs that show real profit.

2026-10-24 · fractional CFO for agencies

Fractional CFO vs Full-Time CFO: What Your Agency Actually Needs

Fractional CFO vs full-time CFO for agencies: real costs, what each one actually does, and the revenue stage where each starts to make sense.

2026-10-25 · QuickBooks for agencies

QuickBooks for Agency Owners: Why DIY Bookkeeping Is Costing You More

Doing your own QuickBooks bookkeeping as an agency owner? The real cost of DIY: your hours, your errors, and the decisions you can't make without clean numbers.

2026-10-26 · agency cash runway

Cash Runway: How Many Months Could Your Agency Survive?

Cash runway for agencies: what it is, how to calculate yours in 2 minutes, what's a healthy number, and exactly what to do if yours is under 3 months.

2026-10-27 · bookkeeping mistakes agencies

7 Bookkeeping Mistakes That Kill Agency Profitability

The 7 bookkeeping mistakes that quietly kill agency profitability: pass-through ad spend, retainer timing, no per-client costs, late books and more — plus the fix for each.