| Office Rent |
Fixed |
Include $3,500 per month in fixed overhead from Month 1 through Month 60. |
Tying rent to trip count instead of treating it as capacity overhead. |
| Software Licenses (Admin) |
Fixed |
Include $800 per month in fixed overhead for the relevant monthly planning range. |
Spreading admin software across trips and overstating variable expense. |
| General Liability Insurance |
Fixed |
Include $1,500 per month in fixed overhead unless the policy pricing changes by volume tier. |
Leaving insurance out because it does not attach to one trip. |
| Legal Retainer |
Fixed |
Include $1,000 per month in fixed overhead from Month 1 through Month 60. |
Classifying routine legal support as a one-time startup item. |
| Driver Background Checks |
Variable |
Apply the model rate to revenue, starting at 3.0% in the first year and declining to 2.0% by Year 5. |
Using the 3.0% first-year rate forever after vendor efficiency improves. |
| Payment Gateway Fees |
Variable |
Apply the payment fee rate to processed sales, starting at 2.5% in the first year. |
Modeling card fees as fixed even though they rise with order value. |
| Cloud Hosting & Infrastructure |
Variable |
Apply the usage rate to revenue, starting at 4.0% in the first year and declining as scale improves. |
Treating hosting as flat while sessions, bookings, and data usage grow. |
| Customer Support (Per Trip) |
Variable |
Apply the per-trip support rate to revenue, starting at 3.0% in the first year. |
Forgetting that driver pay, mileage reimbursement, parking, and tolls are also variable if the company pays them. |