{"id":163931,"date":"2026-10-13T10:21:10","date_gmt":"2026-10-13T14:21:10","guid":{"rendered":"https:\/\/www.constantcontact.com\/blog\/?p=163931"},"modified":"2026-10-13T12:32:56","modified_gmt":"2026-10-13T16:32:56","slug":"return-on-investment","status":"publish","type":"post","link":"https:\/\/www.constantcontact.com\/blog\/return-on-investment\/","title":{"rendered":"How to Measure Marketing ROI Using Baselines and Holdout Tests"},"content":{"rendered":"<!DOCTYPE html PUBLIC \"-\/\/W3C\/\/DTD HTML 4.0 Transitional\/\/EN\" \"http:\/\/www.w3.org\/TR\/REC-html40\/loose.dtd\">\n<html><body><ul style=\"background-color:#d6f8ff\" class=\"wp-block-list has-background has-medium-font-size\">\n<li><strong>Count only the sales your campaign caused<\/strong> by subtracting your normal baseline sales before you measure marketing ROI.<\/li>\n\n\n\n<li><strong>Hold back a random slice of your email or text list<\/strong> so you can compare people who got the campaign with people who didn&rsquo;t.<\/li>\n\n\n\n<li><strong>Add every cost to the formula<\/strong> so discounts, printing, software, and your hours all count against the profit.<\/li>\n\n\n\n<li><strong>Use each result to make one budget move<\/strong> by repeating the campaign, tweaking and retesting it, or cutting it.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">You send out a promo email on Monday, and by Friday, your appointment book is completely full. It feels like a huge win, until you realize you have no idea whether the email drove those bookings or if it was just going to be a busy week anyway.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">You&rsquo;re not alone in that uncertainty. Less than 20% of small business owners feel &ldquo;very confident&rdquo; about the real impact of their marketing, according to <a href=\"https:\/\/www.constantcontact.com\/blog\/small-business-now-report\/\">Constant Contact&rsquo;s June 2025 State of Small Business Marketing report<\/a>. That means four out of five are setting next month&rsquo;s budget on mostly guesswork.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The fix isn&rsquo;t complex data science. It&rsquo;s a simple test using numbers you already have to reveal what your campaigns <em>actually<\/em> earned versus what would have happened anyway. This guide breaks down a seven-step baseline method, channel-specific testing tactics, a 90-day plan, and common mistakes to avoid so you can spend every marketing dollar with confidence.<\/p>\n\n\n\n<h2 id=\"h-what-marketing-roi-really-measures\" class=\"wp-block-heading\">What marketing ROI really measures<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">To calculate true marketing ROI, take the extra gross profit a campaign generated, subtract your total campaign costs, divide by those costs, and multiply by 100.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The key word here is <em>extra<\/em>. Incremental ROI only counts sales that wouldn&rsquo;t have happened without your campaign. Measuring total sales tricks you into giving an email campaign or social media post credit for regular customer walk-ins and natural busy spikes that would have happened either way.<\/p>\n\n\n\n<h2 id=\"h-how-to-measure-marketing-roi-with-a-baseline-test\" class=\"wp-block-heading\">How to measure marketing ROI with a baseline test<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Are you ready to find out what your last campaign really earned? Here&rsquo;s a straightforward process you can follow, using a hypothetical neighborhood bakery&rsquo;s fall pie preorder as the running example.<\/p>\n\n\n\n<h3 id=\"h-step-1-pick-one-campaign-and-one-goal\" class=\"wp-block-heading\">Step 1: Pick one campaign and one goal<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Start with a single campaign that has a clear, countable result, such as preorders, bookings, donations, or sign-ups. For the bakery, that result is fall pie preorders. Don&rsquo;t try to measure everything at once. Here&rsquo;s a simple way to scope your first test:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>One campaign at a time:<\/strong> Choose the email, text, or promo you run most often.<\/li>\n\n\n\n<li><strong>A goal you can count:<\/strong> Pick a number you can tally, such as pies preordered or classes booked.<\/li>\n\n\n\n<li><strong>A clear time window:<\/strong> Set start and end dates before launch, such as one week for a quick promo.<\/li>\n<\/ul>\n\n\n\n<h3 id=\"h-step-2-record-your-baseline\" class=\"wp-block-heading\">Step 2: Record your baseline<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Your baseline is your normal sales without the campaign. It&rsquo;s the yardstick for every result, and in this example, the bakery normally sells about 40 pies a week. You can pull your baseline from a few places:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Same period last year:<\/strong> Use last year&rsquo;s matching weeks if your sales swing with the seasons.<\/li>\n\n\n\n<li><strong>Recent weeks:<\/strong> Average the four weeks before the campaign if your sales stay fairly steady.<\/li>\n\n\n\n<li><strong>Watch for one-off spikes:<\/strong> Leave out unusual days, such as a big catering order, so they don&rsquo;t inflate the average.<\/li>\n<\/ul>\n\n\n\n<h3 id=\"h-step-3-add-up-every-cost\" class=\"wp-block-heading\">Step 3: Add up every cost<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Next, list everything the campaign cost you. Don&rsquo;t skip the small items, because they add up fast. For the bakery, the total comes to $350, and it includes these costs:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Ad spend and printing:<\/strong> Add boosted posts, flyers, and window signs. The bakery spent $150 here.<\/li>\n\n\n\n<li><strong>Discounts you gave:<\/strong> Count every dollar you knocked off the price, because a discount is real money. The bakery&rsquo;s came to $100.<\/li>\n\n\n\n<li><strong>Software share:<\/strong> Add the part of any monthly tool fee this campaign used.<\/li>\n\n\n\n<li><strong>Your time:<\/strong> Multiply your hours by a fair hourly value. The bakery owner&rsquo;s time spent on the campaign came to $100.<\/li>\n<\/ul>\n\n\n\n<h3 id=\"h-step-4-set-aside-a-holdout-group\" class=\"wp-block-heading\">Step 4: Set aside a holdout group<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A holdout group is a slice of your audience that doesn&rsquo;t get the campaign, so you can compare them with the people who did. Think of it as your control group.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For email or text, randomly hold back part of your list. The same tools you use for <a href=\"https:\/\/www.constantcontact.com\/blog\/best-practices-for-email-list-segmentation\/\">email list segmentation<\/a> can make this split quick. Here&rsquo;s how to do it:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Pick a random slice:<\/strong> Split contacts at random, not by who opens most, so both groups look alike.<\/li>\n\n\n\n<li><strong>Keep everything else the same:<\/strong> Send the same offer at the same time to everyone outside the holdout.<\/li>\n\n\n\n<li><strong>Write it down before you send:<\/strong> Note group sizes, dates, and your goal so the results stay honest.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Pro tip:<\/strong> Hold back a slice big enough to count, such as 1 in 5 contacts. Don&rsquo;t ever hold back transactional messages like order confirmations.<\/p>\n\n\n\n<h3 id=\"h-step-5-run-the-campaign-and-tag-every-sale\" class=\"wp-block-heading\">Step 5: Run the campaign and tag every sale<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">It&rsquo;s go time! Launch the campaign and tag every sale it brings in. Don&rsquo;t count on remembering where sales came from at the end of a busy week. Use one or more of these tracking methods:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Unique promo codes:<\/strong> Give the campaign its own code, such as PIE25, so every redemption points back to it.<\/li>\n\n\n\n<li><strong>UTM links:<\/strong> UTM tags are short labels added to a link so your website analytics shows where each visit came from.<\/li>\n\n\n\n<li><strong>A checkout question:<\/strong> Ask &ldquo;How did you hear about us?&rdquo; at the register or on your order form.<\/li>\n\n\n\n<li><strong>A dedicated booking link:<\/strong> Send people to an order or booking page that only this campaign uses.<\/li>\n<\/ul>\n\n\n\n<h3 id=\"h-step-6-calculate-your-incremental-lift-and-roi\" class=\"wp-block-heading\">Step 6: Calculate your incremental lift and ROI<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">This is where the numbers come together. To find your true ROI, you first calculate your <strong>extra (incremental) gross profit<\/strong>, then plug it into the standard ROI formula:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>(Incremental Gross Profit &minus; Total Costs) &divide; Total Costs &times; 100 = Incremental ROI<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Let&rsquo;s run the bakery numbers through it step by step:<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>Find your extra sales:<\/strong> The bakery sold 100 pies during the campaign week. Subtracting their normal baseline of 40 pies leaves <strong>60 extra pies caused by the campaign<\/strong>.<\/li>\n\n\n\n<li><strong>Calculate extra gross profit:<\/strong> 60 extra pies &times; $25 each = $1,500 in extra revenue. With a 50% profit margin, that yields <strong>$750 in extra gross profit<\/strong>.<\/li>\n\n\n\n<li><strong>Calculate incremental ROI:<\/strong> Subtract the $350 campaign costs from $750, leaving $400 in net profit. Divide $400 by $350 and multiply by 100 to get an <strong>incremental ROI of 114%<\/strong>.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Why this matters:<\/strong> If you measured total sales instead (all 100 pies), your profit would look like $1,250, giving you a misleading total ROI of <strong>257%<\/strong>. Accounting for your baseline cuts the &ldquo;fake&rdquo; profit by more than half, giving you the real picture.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>(Note: If you ran a holdout group instead of a baseline, compare sales per contact between the two groups to find your extra sales. The calculation steps remain the exact same.)<\/em><\/p>\n\n\n\n<h3 id=\"h-step-7-turn-the-result-into-a-budget-decision\" class=\"wp-block-heading\">Step 7: Turn the result into a budget decision<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Measuring ROI isn&rsquo;t just an exercise in math; it&rsquo;s how you decide where your next marketing dollar goes. Based on your result, take one clear action:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Positive ROI:<\/strong> Scale it up with a bigger list or longer run.<\/li>\n\n\n\n<li><strong>Near Zero:<\/strong> Tweak one element (like the offer or send day) and run it again.<\/li>\n\n\n\n<li><strong>Negative ROI:<\/strong> Pause the campaign or rebuild it from scratch.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Having written proof takes the guesswork out of lean months. Imagine your retail shop hits a slow quarter and you need to trim monthly expenses. Without testing, it&rsquo;s easy to cut the wrong thing. With a simple test result showing your holiday email sequence reliably generates 114% incremental ROI, you know instantly to keep that campaign running and cut the tactics that aren&rsquo;t converting.<\/p>\n\n\n\n<h2 id=\"h-baseline-holdout-or-a-b-test-which-one-fits-your-campaign\" class=\"wp-block-heading\">Baseline, holdout, or A\/B test: Which one fits your campaign?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The right test depends on your channel, list size, and the specific question you&rsquo;re trying to answer.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Want to know if a campaign earned profit?<\/strong> Run a <strong>baseline<\/strong> or <strong>holdout<\/strong> test.<\/li>\n\n\n\n<li><strong>Already know a channel works and want to fine-tune it?<\/strong> Run an <strong>A\/B test<\/strong>.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">For example, an email campaign makes it easy to hold back 1 in 5 subscribers to compare sales between groups. But for a public social media post or flyer drop, you can&rsquo;t hide the message from part of your audience, so a before-and-after baseline works best.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Use this quick guide to pick the right method for your next campaign:<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-ctct-orange\"><table class=\"has-fixed-layout\"><thead><tr><th>Method<\/th><th>What it compares<\/th><th>Best for<\/th><th>What you need<\/th><th>Watch out for<\/th><\/tr><\/thead><tbody><tr><td>Before-and-after baseline<\/td><td>Campaign sales vs. normal average sales<\/td><td>Social media posts, flyers, and local events<\/td><td>A few weeks of past sales<\/td><td>Seasonal swings and one-off sales spikes<\/td><\/tr><tr><td>Holdout group<\/td><td>Audience who got the campaign vs. audience held back<\/td><td>Email newsletters and SMS promotions<\/td><td>A list big enough to split (e.g., 500+ contacts)<\/td><td>Holding back too few contacts to get a clear result<\/td><\/tr><tr><td>A\/B test<\/td><td>Version A vs. Version B of the same message<\/td><td>Refining subject lines, offers, or send times<\/td><td>Two creative variants and one active list<\/td><td>Shows which option won, but not whether either made a profit<\/td><\/tr><tr><td>Location or time-based test<\/td><td>A store or week with the campaign vs. one without<\/td><td>Multi-location shops or steady weekly routines<\/td><td>Two comparable stores or predictable weekly sales<\/td><td>Differences in foot traffic or local events<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">An A\/B test picks the better version, while a holdout shows whether the campaign earned anything at all.<\/p>\n\n\n\n<h2 id=\"h-how-to-run-an-roi-test-on-each-marketing-channel\" class=\"wp-block-heading\">How to run an ROI test on each marketing channel<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Testing looks different depending on the channel. With direct channels (like email and text), you control exactly who receives your message. With broadcast channels (like social media and flyers), you can&rsquo;t hide the offer, so you rely on baselines and tracking codes instead.<\/p>\n\n\n\n<h3 id=\"h-email-campaigns-highest-control\" class=\"wp-block-heading\">Email campaigns (highest control)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Email is the easiest place to run a holdout test because your email tool lets you divide your audience with a click.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Split the list:<\/strong> Hold back a random slice (e.g., 20%) and send the promotion to the remaining 80%.<\/li>\n\n\n\n<li><strong>Compare sales per contact:<\/strong> Divide the total purchases in each group by the number of contacts in that group. The difference is your campaign&rsquo;s true lift.<\/li>\n<\/ul>\n\n\n\n<h3 id=\"h-text-message-promotions-high-control\" class=\"wp-block-heading\">Text message promotions (high control)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Texting works the same way as email, with higher urgency and faster redemption.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Hold out a slice:<\/strong> Keep a segment of your SMS subscribers from receiving the text offer.<\/li>\n\n\n\n<li><strong>Track redemptions cleanly:<\/strong> Use an SMS-only keyword or code (e.g., <code>TEXT10<\/code>) and send at your usual time so timing doesn&rsquo;t skew the results.<\/li>\n<\/ul>\n\n\n\n<h3 id=\"h-social-media-posts-and-ads-baseline-approach\" class=\"wp-block-heading\">Social media posts and ads (baseline approach)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Because public posts are visible to everyone, you can&rsquo;t easily create a holdout group.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Use dedicated links or codes:<\/strong> Include a unique link (using a UTM tag or short link) or a social-only promo code.<\/li>\n\n\n\n<li><strong>Compare against a quiet period:<\/strong> Run the offer for a set window (like five days), then compare total sales to a similar five-day stretch when you ran no promotions.<\/li>\n<\/ul>\n\n\n\n<h3 id=\"h-print-and-in-store-promotions-tracking-by-tagging\" class=\"wp-block-heading\">Print and in-store promotions (tracking by tagging)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Printed flyers, bag stuffers, and window signs don&rsquo;t come with digital clicks, so you have to create a trail manually.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Offer a tangible tracker:<\/strong> Print a unique code on the flyer or run an exclusive bundle deal.<\/li>\n\n\n\n<li><strong>Ask at checkout:<\/strong> Have your staff ask, <em>&ldquo;What brought you in today?&rdquo;<\/em> or set up an order form field, then measure total sales against your average baseline week.<\/li>\n<\/ul>\n\n\n\n<h3 id=\"h-what-about-customers-who-touch-multiple-channels\" class=\"wp-block-heading\">What about customers who touch multiple channels?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A customer might see your Instagram post, read your email, and finally redeem in your store. Don&rsquo;t stress over which channel deserves the trophy. As long as your overall gross profit beats your baseline after covering all marketing costs, the combined effort worked.<\/p>\n\n\n\n<h2 id=\"h-a-simple-testing-plan-for-the-next-90-days\" class=\"wp-block-heading\">A simple testing plan for the next 90 days<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">You don&rsquo;t need an agency, a massive budget, or a spreadsheet degree to test your marketing. Whether you spend $50 or $500 a month, testing simply guarantees that your limited dollars and hours go toward what actually works.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Over the next 90 days, commit to the tier that matches your available time:<\/p>\n\n\n\n<h4 id=\"h-tier-1-starter-1-test-per-quarter\" class=\"wp-block-heading\">Tier 1: Starter (1 test per quarter)<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Who it&rsquo;s for:<\/strong> Solo operators with an hour or less per week for marketing.<\/li>\n\n\n\n<li><strong>The commitment:<\/strong> Run just one test over the next 90 days.<\/li>\n\n\n\n<li><strong>The game plan:<\/strong> Pick your single biggest recurring promotion, like your monthly customer newsletter or seasonal email blast, and hold back 20% of your list to measure true incremental sales.<\/li>\n<\/ul>\n\n\n\n<h4 id=\"h-tier-2-steady-1-test-per-month\" class=\"wp-block-heading\">Tier 2: Steady (1 test per month)<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Who it&rsquo;s for:<\/strong> Businesses that communicate with customers on a predictable schedule.<\/li>\n\n\n\n<li><strong>The commitment:<\/strong> Run three tests total (one each month).<\/li>\n\n\n\n<li><strong>The game plan:<\/strong> Rotate your channels. Run an email holdout test in month one, an SMS test in month two, and a social baseline test in month three.<\/li>\n<\/ul>\n\n\n\n<h4 id=\"h-tier-3-growing-continuous-testing\" class=\"wp-block-heading\">Tier 3: Growing (continuous testing)<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Who it&rsquo;s for:<\/strong> Established businesses running paid ads alongside regular email and social promos.<\/li>\n\n\n\n<li><strong>The commitment:<\/strong> Keep a control or holdout group running on every recurring campaign.<\/li>\n\n\n\n<li><strong>The game plan:<\/strong> Carve out a permanent 10% to 20% holdout slice across all regular broadcasts, review the numbers at the end of every quarter, and shift your budget directly to the winners.<\/li>\n<\/ul>\n\n\n\n<h2 id=\"h-common-mistakes-to-avoid-when-measuring-marketing-roi\" class=\"wp-block-heading\">Common mistakes to avoid when measuring marketing ROI<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Even with a simple formula, small testing slips can skew your numbers. Watch out for these five common traps:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>1. Giving your campaign credit for normal sales<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>The mistake:<\/strong> Dividing total promotion revenue by costs without factoring in regular customer volume.<\/li>\n\n\n\n<li><strong>The fix:<\/strong> Subtract your baseline first. Run only the <em>incremental gross profit<\/em> through your ROI formula.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>2. Forgetting &ldquo;invisible&rdquo; costs<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>The mistake:<\/strong> Only tallying what shows up on a credit card receipt, ignoring price cuts and labor.<\/li>\n\n\n\n<li><strong>The fix:<\/strong> Count every dollar knocked off via discounts and assign a realistic hourly rate to your own time. Your ROI percentage will look lower, but it will reflect real profit.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>3. Changing too many variables at once<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>The <strong>mistake<\/strong>:<\/strong> Tweaking the headline, discount offer, and send time all in the same campaign.<\/li>\n\n\n\n<li><strong>The fix:<\/strong> Test one element at a time. If you change three variables simultaneously, you won&rsquo;t know which one drove the result.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>4. Calling the test too early<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>The <strong>mistake<\/strong>:<\/strong> Checking numbers after 24 hours or pulling the plug after just three or four sales.<\/li>\n\n\n\n<li><strong>The fix:<\/strong> Let the campaign run its planned duration (e.g., a full 5 to 7 days) so you gather enough transactions to see an honest pattern.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>5. Testing during an abnormal week<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>The mistake:<\/strong> Running a baseline test during a holiday weekend, seasonal surge, or local street festival.<\/li>\n\n\n\n<li><strong>The fix:<\/strong> Test during steady, typical weeks. If you must run a holiday promo, compare it against that exact same holiday week from last year rather than a regular Tuesday.<\/li>\n<\/ul>\n\n\n\n<h2 id=\"h-stop-guessing-and-spend-with-confidence\" class=\"wp-block-heading\">Stop guessing and spend with confidence<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Marketing shouldn&rsquo;t feel like throwing cash into a black box and hoping for the best. When you measure only the sales your campaigns actually caused, setting your budget stops being an anxious guessing game and becomes a clear business decision. You protect your cash during slow months and double down on what works when it counts.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">You don&rsquo;t need a math degree or messy spreadsheets to put this into practice. <a href=\"https:\/\/www.constantcontact.com\/smb\/signup3?ic=blog\">Start your free 30-day trial of Constant Contact<\/a> to automate list segmentation, run simple holdout tests, and see what your marketing actually earns from one clean dashboard.<\/p>\n\n\n\n<h2 id=\"h-faqs\" class=\"wp-block-heading\">FAQs<\/h2>\n\n\n\n<h3 id=\"h-what-is-a-good-marketing-roi\" class=\"wp-block-heading\">What is a good marketing ROI?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Any ROI above 0% means the campaign earned back more gross profit than it cost. The right target depends on your margins, so compare each test with your last one instead of a generic benchmark.<\/p>\n\n\n\n<h3 id=\"h-what-s-the-difference-between-roi-and-roas\" class=\"wp-block-heading\">What&rsquo;s the difference between ROI and ROAS?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">ROAS (return on ad spend) is revenue divided by ad spend, while ROI uses profit and every cost. That&rsquo;s why a campaign can have a high ROAS and still lose money.<\/p>\n\n\n\n<h3 id=\"h-how-do-i-measure-roi-for-awareness-campaigns-that-pay-off-slowly\" class=\"wp-block-heading\">How do I measure ROI for awareness campaigns that pay off slowly?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Stretch your measurement window and track a result you can count now, such as new email sign-ups or first-time visitors. Then compare those numbers against your baseline over the following months.<\/p>\n\n\n\n<h3 id=\"h-how-big-should-my-holdout-group-be\" class=\"wp-block-heading\">How big should my holdout group be?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Make it big enough that each group produces a countable number of sales. For most small lists, holding back about 1 in 5 contacts is a practical place to start.<\/p>\n\n\n\n<h3 id=\"h-what-is-the-70-20-10-rule-in-marketing\" class=\"wp-block-heading\">What is the 70\/20\/10 rule in marketing?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">It&rsquo;s a budgeting guideline that puts about 70% of spend into proven campaigns, 20% into promising ones, and 10% into experiments. Your ROI tests tell you which campaigns belong in each bucket.<\/p>\n<\/body><\/html>\n","protected":false},"excerpt":{"rendered":"<p>You send out a promo email on Monday, and by Friday, your appointment book is completely full. It feels like a huge win, until you realize you have no idea whether the email drove those bookings or if it was just going to be a busy week anyway. You&rsquo;re not alone in that uncertainty. 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