Direct-mail ROI depends on the contribution from deals you close, not the number of calls alone. Use this calculator to connect campaign spending to responding prospects, purchase opportunities and closed deals. Every rate is your assumption; the starting example is invented and is not a Homebase result or forecast.
TL;DR
- Use total campaign investment, including the work around the mail, and count each cost once.
- Apply each rate to its own stage: responses from mailed pieces, opportunities from responding prospects, and closings from those opportunities.
- Enter deal contribution after deal costs but before this campaign's costs. Gross resale revenue would overstate the campaign's return.
- Expected deals can be fractional. Actual closings are whole events, and a positive modeled return does not guarantee one.
What counts as campaign investment?
Campaign investment is the full amount you assign to the campaign: data, design, printing, postage, follow-up and other campaign costs. A quoted mailing price may not include every item in your operation.
USPS's marketing calculator distinguishes mailing volume, campaign budget, margin, responses and closings. This worksheet uses that kind of stage-by-stage arithmetic for an investor's purchase process. Its assumptions are not taken from USPS response-rate examples.
Use the same campaign window for pieces, spending and results. Count repeat mailings as additional pieces. Count a responding prospect once across that window, rather than treating every call from the same person as a new prospect. Keep that definition consistent when you estimate the response rate.
The direct-mail cost guide helps separate a per-piece quote from the broader work. The response-rate guide explains why a response is not a purchased house.
How does the calculator turn responses into deals?
Expected responding prospects equal mailed pieces multiplied by your response-rate assumption. Expected purchase opportunities equal responding prospects multiplied by the opportunity rate. Expected deals equal those opportunities multiplied by the close rate.
Here, an opportunity is a prospect you expect to pursue as a possible purchase. It is a scenario input, separate from Homebase's Qualified dashboard status. A 10% close rate means 10% of the opportunities, not 10% of the mailing list.
Campaign ROI equals contribution after campaign cost divided by campaign investment. Contribution after campaign cost is expected deals times contribution per deal, minus campaign investment.
Zero denominators display “Not defined.” A campaign with no expected deals has no defined cost per deal. A zero-cost scenario has no defined ROI percentage. When contribution per deal is zero, a positive campaign investment cannot break even under those assumptions.
An illustrative campaign and a weaker response
Start with 2,000 pieces, $2,000 in campaign investment, a 1% response rate, a 25% opportunity rate, a 10% close rate and $5,000 contribution per closed deal.
| Result | Starting example | Response rate reduced to 0.5% |
|---|---|---|
| Responding prospects | 20 | 10 |
| Purchase opportunities | 5 | 2.5 |
| Expected closed deals | 0.5 | 0.25 |
| Contribution after campaign cost | $500 | −$750 |
| Campaign ROI | 25% | −37.5% |
Every number in this example is invented. Half an expected deal is an average across possible outcomes, not half a closing you can collect. The whole-deal break-even output is one deal in either scenario: $2,000 divided by $5,000, rounded up. That arithmetic says how many such deals cover the investment; it does not tell you how likely a closing is.
How do you turn the model into a useful decision?
Test weaker response, fewer opportunities, a lower close rate and a lower contribution per deal. Keep a campaign ledger so you can replace assumptions with observed outcomes over a consistent window.
Recorded responses and proven attribution are different. Do not credit a shared-number call to a particular mailing by guesswork. Keep the seller conversation moving with the follow-up guide. Read the Homebase method and About page for what the service handles and what remains your work.
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