Invest · Cash Flow
Operator cash flow, not Instagram math
Cash flow is not rent minus the mortgage. That version looks great in a 30-second video. It is also the version that gets investors into deals they cannot carry when a tenant is late, a unit is empty, or the HVAC dies in July.
Part 1
Two definitions
Instagram version
Flash a rent number. Subtract the payment. Call the difference “cash flow.” Tell people to buy ten more. Missing: vacancy, taxes, insurance, turns, CapEx, management, HOA, owner-paid utilities.
Operator version
After defendable income and honest expenses, what is left? If rent dropped to zero for a while, could you still sleep at night? That is the conversation we want before structure.
Part 2
Monthly stack example (illustrative)
Made-up long-term rental in the Oklahoma City metro. Numbers are for teaching the categories. They are not a quote, not a market average, and not a promise of results.
Example · Illustrative only
Same house, two stories
| Line | Instagram math | Operator math |
|---|---|---|
| Gross rent assumption | $1,650 | $1,650 |
| Vacancy / credit loss set-aside | $0 | $132 (8%) |
| Effective income | $1,650 | $1,518 |
| P&I (illustrative) | $1,180 | $1,180 |
| Taxes | $0 shown | $200 |
| Hazard insurance | $0 shown | $180 |
| HOA | $0 | $0 |
| Maintenance / turns set-aside | $0 | $125 |
| CapEx set-aside (roof, HVAC, etc.) | $0 | $100 |
| Management (or value of your time) | $0 | $132 (8%) |
| Owner-paid utilities | $0 | $0 in this example |
| Left after the stack | $470 “cash flow” | about -$399 |
Same rent. Same payment. Completely different decision. The Instagram story says buy. The operator story says renegotiate, re-underwrite expenses, or walk.
Teaching defaults for the example only. Vacancy, management, and CapEx assumptions are not MSM guidelines.
Part 3
What belongs in the stack
- Defendable rent : comps or a current lease, not the listing flyer’s wish.
- Vacancy : empty months and credit loss happen. Bake them in.
- Taxes : use the bill or assessor data; watch purchase reassessment.
- Insurance : subject quote; flood when needed.
- HOA : dues, rental rules, special assessments.
- Maintenance and turns : paint, cleaning, minor repairs between tenants.
- CapEx : roof, HVAC, water heater, flooring over a hold period.
- Management : fee or the value of your time if you self-manage.
- Owner-paid utilities : water, trash, common electric when the landlord pays.
- Debt service : the actual payment stack tied to the loan you are considering.
DSCR snapshots often stop at income vs. PITI/HOA. Your personal hold decision should not. See DSCR Basics and Deal Underwriting.
Part 4
Four numbers before you fall in love with a listing
1. Total cash in
Down payment, closing costs, immediate repairs, lease-up cash.
2. Defendable income
Lease or comps with vacancy built in. Not best-case social media rent.
3. Carry if rent is zero
How many months can you cover payment and bills without panicking?
4. 5-year and 20-year plan
Hold, refinance, sell, or roll into the next deal. Be specific.
Part 5
Financing follows the deal
If the property does not work as a rental under honest assumptions, the “right loan” will not save it. A strong deal with a clear plan can support a conversation about structure, including DSCR-style options when they fit. What never belongs here: promised rates, approvals, or what a lender will always do.
Start a conversation
Want a second set of eyes on the stack?
Send the address, price, rent assumption, and your four numbers. We will walk it like operators.
Start a deal conversationDominic Dangora | NMLS 816033 | Modern State Mortgage NMLS #2864954
For educational purposes for real estate investors and partners. Not an offer of credit. Not a commitment to lend. All loans are subject to underwriting approval. Not all applicants will qualify. Example figures are illustrative only. Property data and rent estimates can be wrong. Equal Housing Opportunity. Full disclaimer.