QCMS Rental Cash Flow Calculator for Claude
Ask Claude whether a rental property would cash flow. Claude runs our calculator on your numbers and returns monthly cash flow, cap rate, cash-on-cash return, and debt coverage.
WHAT IT DOES
What the Connector Does
The connector adds one tool to Claude. When you ask a question like “Would a $300,000 house that rents for $2,200 cash flow?”, Claude can send the numbers you gave it to the QCMS Rental Cash Flow Calculator and read the result back to you.
From a purchase price and monthly rent it returns monthly and annual cash flow after the loan payment, net operating income, cap rate, cash-on-cash return, debt service coverage, and break-even occupancy. It checks the 1 percent and 50 percent rules, shows conservative, base and optimistic rent cases, and compares managing the property yourself, with your time counted, against hiring a manager.
Who it is for. Buyers weighing a rental, owners checking a property they already have, and anyone comparing two offers on the same numbers. It answers one question, with your numbers. To decide whether to keep a house you already own or sell it, use the Rent vs Sell Calculator for Claude.
Queen City Management Services (QCMS), a Charlotte property management company, built it. It is free and needs no account.
EXAMPLE
What a Result Looks Like
This is real output from the connector for a $300,000 house that rents for $2,200 a month. Inputs we did not set use the calculator’s stated defaults: 25 percent down, a 7 percent rate on a 30-year loan, 3 percent closing costs, $2,700 property tax, $1,500 insurance, and 5 percent each for vacancy, maintenance and capital reserve.
| Rent case | Monthly rent | Monthly cash flow | Cap rate | Cash-on-cash |
|---|---|---|---|---|
| Conservative | $1,980 | -$164 | 5.2% | -2.1% |
| Base | $2,200 | $23 | 6.0% | 0.3% |
| Optimistic | $2,420 | $210 | 6.7% | 2.7% |
On the base case the property clears about $23 a month after the loan payment, a thin margin: net operating income is $18,240 a year against loan payments of $17,963, a debt service coverage of 1.02, and break-even occupancy of 94 percent. Rent is 0.73 percent of the price, below the 1 percent screening guideline. With the owner’s time counted at the default, managing it yourself comes out about $958 a year ahead of hiring a manager at the example fees.
Source: output of this connector, November 10, 2026. Defaults are assumptions. See the Rental Cash Flow Calculator for a worked example line by line.
HOW IT WORKS
How Do You Use It?
- Add the connector. In Claude, open Customize, then Connectors, choose Add custom connector, paste
https://cashflow-mcp.qcmscharlotte.com/mcp, and pick “No sign-in.” Once it is listed in Claude’s connector directory you will be able to add it from there. - Have two numbers ready. The purchase price and the monthly rent you expect. Add the down payment, interest rate, property tax and insurance if you know them.
- Ask in plain words. Copy one of these into Claude:
- “I’m looking at a $300,000 house that would rent for $2,200 a month. Would it cash flow?”
- “Same house with 20 percent down and a 6.5 percent rate.”
- “What if I hire a property manager at 8 percent?”
- “Show me the conservative and optimistic rent cases.”
- Approve the tool when Claude asks. Claude asks permission before it uses a connector.
- Check the assumptions. Claude lists the defaults it used. Replace them with your real numbers and ask it to run the estimate again.
NEXT STEP
The Connector or the Full Calculator?
The connector gives you a fast answer inside a chat. The full Rental Cash Flow Calculator on our website gives you every input as an adjustable field, a worked example line by line, and the terms defined. Use the connector to screen a property. Use the full calculator when you are close to an offer.
If the numbers work and you want it managed, see what Charlotte property management with QCMS covers.
LIMITS
What Does the Connector Leave Out?
- Taxes and depreciation. It estimates cash flow before income tax. It does not model depreciation, deductions, or tax on a sale.
- Appreciation and rent growth. It estimates a single year at the rent you enter. It does not project future years.
- Your real numbers. Every input you do not provide uses a default, and defaults are assumptions. The vacancy, maintenance, reserve, management and leasing figures are placeholders, not a quote or rate from QCMS or any other manager.
- Advice. These are estimates. They are not tax, legal, or financial advice. Confirm the figures with a lender or a CPA.
PRIVACY
What Happens to Your Numbers?
Claude sends the numbers you provided to our calculator for that one request. The calculator returns the answer and does not store the numbers. There is no account and no sign-in. Read the full privacy policy.
What Owners Say About Working With QCMS
“Halah and QCMS have managed my property for more than a decade, and my continued use of her services speaks for itself. Our relationship truly feels like a partnership — she communicates promptly, knows her markets inside and out, and puts the property's interests first.”
“My initial interaction with Queen City Management Services has been fantastic! Mrs. Halah in particular is very professional, courteous, helpful, and kind. She goes above and beyond. What I appreciate even more is her genuineness and candor. She is firm and very fair!”
“I had a wonderful experience renting this beautiful five-bedroom home for the past two years.”
Found a Charlotte Rental Worth a Closer Look?
A free, no-obligation review. No management agreement needed.
Send us the address and the numbers from the panel. A broker at QCMS checks your rent, costs, and loan against what we see on Charlotte-area rentals.
FAQ
Rental Investor Questions Answered
What is the QCMS Rental Cash Flow Calculator for Claude?
A free connector that lets Claude run the QCMS Rental Cash Flow Calculator on your numbers. From a purchase price and expected rent it estimates monthly cash flow, cap rate, cash-on-cash return, and debt service coverage. It needs no account.
Does it store my numbers?
No. It uses the numbers Claude sends to run the calculation and return the result. It does not write them to a database or a log. The full policy is on the connector’s privacy page.
What do I have to provide?
Only a purchase price and the monthly rent you expect. Every other input has a stated default, and the result lists the defaults it used so you can replace them with your own numbers.
Does it count the cost of a property manager?
Yes. The result compares managing the property yourself, with your time counted at an hourly value you can change, against hiring a manager at example fees. Those fees are assumptions, not a quote from any manager.
Is it the same as the calculator on your website?
It uses the same math. The website version adds adjustable fields for every input, a worked example line by line, and defined terms.
Have another question? See all QCMS Property Management FAQs →
Get Started
Send Us the Deal You Are Looking At
Tell us the address, the asking price, and the rent you expect. A broker at QCMS will review the numbers against what we see on Charlotte-area rentals and tell you what looks thin before you make an offer. You do not need a management agreement to get the review, and you already have the numbers from the panel.
- No obligation, no management agreement to get the review
- A broker reviews the rent, the costs, and the loan, not a form letter
- Checked with the same math as the panel and the Rental Cashflow Calculator
- English and Spanish available
- Prefer to call? Reach us at 704.941.4557
- Harper, our 24/7 AI, answers after hours and routes you to the right person.
Request a Broker-Reviewed Rental Analysis
Free · No Obligation · English & Spanish
Licensed, Accountable & Compliant — NC Firm No. C24768
