How Do You Improve ROI in Digital Marketing?

The agency’s quarterly deck recommends what it recommended last quarter: fresh ad creative, a new bid strategy test and more budget for the campaign showing the best return. Meanwhile finance has asked why digital spend went up this year while the number of new customers stayed where it was, and nobody can say which of the tactics on the table would move the return, so how do you improve ROI in digital marketing?

Improve ROI in digital marketing in this order: raise what each customer is worth, convert more of the visitors you already pay for, teach the ad platforms to find buyers, remove spend that wins no one, then change the budget.

The order matters, because the quickest way to lift the ROI figure is to cut spend, and that can lower the profit the figure was meant to measure.

What Are the Best Ways to Increase Marketing ROI?

The best ways to increase marketing ROI change one of its inputs: what each customer is worth, how many of the people you pay to reach become customers, what the ad platforms are trying to find, and how much spend reaches anyone who could buy. Start from an ROI rebuilt from your own sales records, since a dashboard figure can rise while the business wins nothing extra.

  1. Rebuild last quarter’s ROI for each channel from your CRM, on gross profit and signed customers, as how to measure digital marketing ROI explains.
  2. Split each figure by type of customer and by what they bought, since an average blends buyers worth widely different amounts.
  3. Find the stage where most of the people you paid for drop out, and fix the cheapest leak first, which in the accounts we review is usually reply speed or the page paid traffic lands on.
  4. Change what the ad platforms count as a conversion, so their bidding goes after qualified leads and sales.
  5. Remove spend that never produces customers, such as searches and audiences that don’t match your buyer.
  6. Only then change the budget, judging any increase or cut by the profit it adds or removes rather than the ROI percentage.

The Channel Selection step of ProfitPaths®, 5K’s method, shows how to set up the source of truth this list depends on.

The levers on digital marketing ROI, and where each one is covered

LeverWhat it changes in the ROIWhere it’s covered
What each customer is worthThe return: gross profit per customer wonIMPACT Offering and IMPACT Prospect
How many visitors become customersHow many customers the same spend buysProspect-to-Lead Conversion
What the platforms are told to findWho the bidding spends your money reachingChannel Selection
Spend that reaches no buyerThe cost, with no change in customersHow to do a PPC audit
How much you spendBoth sides at once, with each added dollar returning lessMarketing Action Plan

How Can You Improve Marketing ROI Without Spending More?

You can improve marketing ROI without spending more by raising what each customer is worth and by converting more of the visitors you already pay for, since both lift the return while the cost stays put. In the accounts we review, the return side gets the least attention, because ad dashboards say nothing about which customers were worth winning.

  • Point the spend at the offering that earns the most per customer, because ads tend to sell whatever is easiest to sell, often the offering with the thinnest margin, which the IMPACT Offering step shows how to check.
  • Aim at the buyers who pay the best margin and stay the longest, since the same product can be worth many times more to one type of buyer than another, which the IMPACT Prospect step shows with three types of buyer.
  • Count follow-on sales in the return once you’ve measured how many customers go on to buy more, and how to increase customer lifetime value covers raising it.
  • Turn poor fits away before they click, since in our own campaigns putting the starting price in the ad cut clicks from buyers who could never afford it.

In the accounts we review, the largest gain that needs no new spend comes after the click, in a page built for the buyer who clicked, a specific offer and a same-day reply, which the Prospect-to-Lead Conversion step covers and how to reduce customer acquisition cost shows on an unchanged budget.

What Do You Do to Improve ROI in Google PPC?

To improve ROI in Google PPC, change what Google counts and values before you touch bids or budgets, because its automated bidding chases whatever you’ve told it a conversion is. Then remove the searches that never turn into customers, and set any return target from your margin.

Google says primary conversion actions are reported in the “Conversions” column and used for bidding, while secondary actions are for observation only,1 so if a brochure download and a qualified lead are both primary, the bidding treats them alike. Google Ads also has goals for leads qualified later in your CRM and for leads that reach a step such as a closed sale.2 The order we work in:

  1. Make a qualified lead or a sale the primary conversion, using the best conversion actions to set in Google Ads and setting conversion value in Google Ads to profit.
  2. Read the search terms report sorted by cost, adding terms that aren’t relevant to what you offer as negative keywords, as Google suggests.3 How to do a PPC audit covers the rest of the account.
  3. Set any target return from your break-even point. Google notes that a target ROAS set too high may limit the traffic your ads get, and suggests gradually lowering it to increase conversion volume,4 so a higher target can buy a better ratio on fewer customers. How to calculate break-even ROAS shows where the floor sits.
  4. Give each change time before you judge it. Google says Smart Bidding typically converges on a new goal within 1 to 2 conversion cycles,5 so a business whose leads take a month to close waits longer than one whose buyers order the same day. How much to spend while you make these changes is covered in how much you should spend on Google Ads.

Can Cutting Ad Spend Improve Marketing ROI?

Cutting ad spend usually raises the ROI percentage, because the first dollars in a channel win the easiest customers and the last dollars the hardest, but it can lower the profit the business keeps. Cut where the added customers cost more than they’re worth, and keep spending where they still earn more than they cost.

Tim Ambler and John Roberts of London Business School made this argument in a 2006 Marketing Science Institute report: because returns diminish, “the point of maximum ROI is reached before the point of maximum profit,” and across a range of spending total profit keeps rising while ROI falls.6 That’s reasoning rather than a measurement, and the running example on this site shows it in a budget decision.

ExampleThe contractor’s LinkedIn ROI fell as spend rose, while the profit it kept more than doubled

The example we follow through every step on this site is a commercial HVAC contractor doing about $40M a year, which sells maintenance agreements to property management firms at $12,000 per building a year and a 38% gross margin. It raised LinkedIn spend one step a quarter, from $9,000 to $30,000, and the firms LinkedIn brought in averaged about five buildings each.

Even the last step was worth taking, because the fifth agreement cost $10,000 on its own, under the $13,680 the contractor decided it could afford to win a firm. That ceiling is one year’s gross profit, which fits this contractor because its customers stay about seven years and its cash flow can carry a one-year payback.

First-year gross profit per LinkedIn agreement (5 buildings × $12,000 × 38%)
$22,800
At $9,000 a quarter, 2 agreements: first-year ROI
407%
At $9,000 a quarter: gross profit kept after ad spend
$36,600
At $30,000 a quarter, 5 agreements: first-year ROI
280%
At $30,000 a quarter: gross profit kept after ad spend
$84,000

These count ad spend only, so fully loaded returns would be lower, and are LinkedIn ads worth it shows the steps in between.

A report that rewarded the highest ROI would have held LinkedIn at its first level and given up more than half the profit it went on to make. Cutting improves both the ratio and the profit in three situations:

  • When the added customers cost more than you can afford to spend to win one, found by dividing each step of extra spend by the extra customers it brought, as the Marketing Action Plan shows.
  • When the spend wins no customers at all, which how you can cut costs in a marketing budget helps you find.
  • When you can’t deliver the extra customers well, as the contractor found in the Marketing Action Plan’s limits section, where its service team set the pace.

How Do You Track ROI to Improve the Next Campaign?

Track ROI to improve the next campaign by changing one lever at a time, keeping the original running beside the change, and reading the result in your CRM after a full sales cycle, because a quarter in which the page, the offer, the bidding and the budget all changed can show ROI rising without telling you what to repeat.

  1. Write down the starting point, spend, customers and gross profit by channel for the last full sales cycle, then pick one lever from the table above and one change to it.
  2. Duplicate the original rather than editing it, so the control keeps running, since in our own campaigns changing several things at once made the results impossible to interpret.
  3. Wait at least one full sales cycle, and longer after a bidding change, then read qualified leads, sales and gross profit in the CRM rather than the platform’s conversion count.
  4. Keep the change or roll it back, then move to the next lever, recording what you did so next year’s plan starts from evidence.

If you run a smaller business, a spreadsheet of every lead’s source, outcome and value is enough. If you lead marketing at a larger company, agree the definition of ROI with finance before the first change, so an improvement isn’t later explained away as a change in method, and what is a good marketing ROI covers the minimum each channel has to clear.

Find Your Weakest Lever Before the Next Budget Review

Before anyone proposes another tactic, rebuild last quarter’s ROI by channel from your CRM and put each channel’s cost per customer beside what those customers are worth, which shows the lever costing you the most return. The channel value calculator on the Channel Selection page does that comparison once you have the spend, the customers and the value of each one.

Step 5 of 6 · Channel Selection

Choose Channels Based on Who You Need to Reach.

Channel Selection means putting your Prospect Magnets where your IMPACT Prospect already pays attention, whether that's Google, LinkedIn, AI search, trade publications or their inbox, and judging each channel by the customers it produces. That means feeding qualified leads and signed customers back to the ad platforms so they optimize for buyers instead of form fills, and keeping a source of truth you control, because every platform is happy to take credit for sales it didn't cause.

Read the Channel Selection step

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