How to Plan Your 2027 Marketing Budget

Build your 2027 marketing budget backward from the revenue you committed to, not forward from what you spent in 2026. Decide how many customers the business needs, work back through your real conversion rates to the spend that produces them, then check that total against an industry benchmark. The benchmark is a sanity check. It is not a plan.

Most budgets get built the other way. Someone opens last year's spreadsheet, adds four percent, renames a line item "AI," and sends it to finance. That number cannot survive a hard question in March.

What Changed Going Into 2027

Budgets stopped growing.

Gartner's 2026 CMO Spend Survey polled 401 senior marketers across the US and Europe at companies above one billion dollars in revenue. It put marketing at 7.8 percent of company revenue, barely ahead of 7.7 percent the year before, and roughly 18 percent below where the same measure sat four years earlier. The CMO Survey's 35th edition, fielded among 308 US marketing leaders, found spending grew 1.7 percent over the prior twelve months. That is the smallest rise since 2021.

The ask went up anyway. Gartner reported that CMOs now route 15.3 percent of the marketing budget into AI, while only 30 percent describe their organization as ready to scale it. Seven in ten admit their processes have not caught up to the tools they bought.

So the 2027 planning problem is not really a money problem. Flat budget, bigger mandate, and a line item nobody can explain yet. You solve that with sequencing, not with a bigger ask.

Step 1: Start From the Revenue Commitment

Write down one number: the new revenue marketing is on the hook for next year.

Not total company revenue. Not pipeline. The new revenue that marketing sources, in dollars, that someone will hold you to.

Then divide backward:

• Take new revenue and divide by average deal size to get customers needed.
• Divide customers by your close rate to get qualified opportunities.
• Divide opportunities by your opportunity conversion rate to get qualified leads.
• Multiply leads by your real cost per qualified lead.

That last figure is your floor. It buys the plan you already promised. Anything above it funds growth, brand, and experiments. Anything below it means you agreed to a target you cannot pay for, and the honest move is to say so in October rather than apologize in June.

Use trailing twelve-month conversion rates, not the ones in the deck from your best quarter. Optimism compounds badly through four divisions.

Step 2: Check the Total Against a Real Benchmark

Now sanity-check the number you built.

The CMO Survey's spring 2026 breakout puts marketing spend at 12.0 percent of revenue for B2C product companies, 10.1 percent for B2B services, 7.2 percent for B2C services, and 7.0 percent for B2B product firms. Gartner's large-company sample lands at 7.8 percent overall.

Two things about those figures. They describe averages, and averages include companies losing share. If your bottom-up number lands far under the benchmark, you are probably underfunding the plan. If it lands far over, you may be buying volume to cover a conversion problem that money will not fix.

Either gap is a question, not a verdict. Write the answer down next to the number.

Step 3: Split the Money Into Three Buckets

Once you know the total, stop thinking in channels. Think in risk.

Defend

The spend that keeps existing revenue: branded search, retention email, the pages that already convert, basic analytics. Cut this and you lose money you already earned. Most companies land somewhere around half to sixty percent here.

Grow

The channels with proof behind them, where more dollars reliably produce more pipeline. Roughly a third of the budget. Every line needs a named owner and a target.

Test

Ten to fifteen percent for things with no track record yet. New channels, AI tooling, a category bet. This bucket has a different rule: it does not need to produce revenue this quarter, but it must produce a decision by a stated date.

The three-bucket split does something a channel spreadsheet cannot. It tells you what to cut in the order you should cut it when a board asks for ten percent back in April. Start with Test, then trim Grow, and touch Defend last.

Step 4: Price the AI Line Honestly

Fifteen percent of the budget going to AI is now normal. Getting value from it is not.

Break the AI line into three parts, because they behave differently:

• Tools. Seats and subscriptions. Easy to buy, easy to stack, easy to forget. Audit what you already pay for before you add anything.
• Implementation. The work of wiring tools into how your team actually operates. This is where the money goes if you want the tools to matter.
• Time. Hours from people who already have jobs. Budget it or the project stalls by February.

The CMO Survey found no marketing technology activity scoring above a 5 on a seven-point performance scale. Nobody is nailing this yet. Plan for a learning curve and put a review date on every tool, or you will renew things nobody opened.

Step 5: Separate Agency Fees From Working Media

Split your outside spend into two lines: what the agency keeps, and what actually reaches a buyer.

Plenty of budgets bury these together. A twenty thousand dollar monthly retainer with twelve thousand in media looks like thirty-two thousand of marketing. It is twelve thousand of marketing and twenty thousand of overhead, and you cannot judge either until you pull them apart.

Do the same for tools, contractors, and content production. Then ask the question that makes the next twelve months easier: what percentage of this budget touches a customer? If the answer is under half, you have a structure problem, and adding budget makes it worse. Our guide to the questions worth asking your agency covers what to do next.

Step 6: Commit the Numbers Before January

A budget is a forecast until someone signs a target to it.

For each line in Grow, write the number it will move, the range you expect, and the date you will check. "Paid search: 180 to 220 qualified opportunities, reviewed quarterly" is a commitment. "Paid search: increase visibility" is a mood.

This matters more than it sounds. The CMO Survey rated the CMO and CFO partnership at 4.5 out of 7 for building business cases, and found marketers splitting roughly 68 percent of their attention on the present against 32 percent on the future. Written commitments are what convert next year's budget conversation from a negotiation into a review. We laid out the full system in the marketing accountability framework.

Step 7: Build the Review Cadence Now

Put four dates in the calendar before the year starts.

Each quarter, three questions:

• Did the committed number move, inside the range?
• What did we learn from the Test bucket, and does anything graduate to Grow?
• What are we stopping?

That third one is the discipline nobody keeps. Budgets rarely fail because a bet went wrong. They fail because the bet that went wrong kept getting funded out of habit. Killing a line mid-year is a sign the process works, not a sign someone messed up.

If you cannot answer the first question with confidence, the problem is measurement, not media. Start there instead.

What to Cut First

When the number comes down, and it usually does, cut in this order:

• Tools nobody logged into last quarter.
• Test-bucket bets past their decision date with no decision.
• Agency scope that produces reports instead of pipeline.
• Channels that generate leads your sales team does not call back.
• Brand spend, reluctantly, and last.

Notice what is missing: across-the-board percentage cuts. Trimming every line by ten percent protects politics and damages the lines that were working. Pick specific things and stop them fully.

A Sample Allocation

For a company doing eight million in revenue with a 7.5 percent budget, that is roughly six hundred thousand dollars a year, or fifty thousand a month:

• Defend, 55 percent. Branded search, SEO and GEO maintenance, lifecycle email, analytics and attribution, the website.
• Grow, 32 percent. Paid acquisition on proven channels, content that already ranks, a named demand-generation owner.
• Test, 13 percent. AI implementation, one new channel, one category bet, each with a decision date.

Then split it again: working media versus overhead. If overhead exceeds forty percent of the total, fix that before you fix anything else.

Where Most 2027 Budgets Will Go Wrong

Three failure modes, in order of how often we see them.

The budget assumes last year's conversion rates and this year's ambition. Model both honestly or neither is real.

The AI line buys software instead of change. Fifteen percent of the budget into tools with no implementation hours is a subscription, not a strategy.

Nobody wrote down what the money was supposed to do. Then in June, everybody argues about whether it worked, using different definitions, with the agency picking the numbers.

Forrester's 2026 planning guidance found 83 percent of B2B marketing decision-makers expecting investment to grow, with 40 percent expecting five percent or more. Rising budgets hide sloppy planning for exactly one year. Then the bill arrives.

If you want a second set of eyes on where the current spend is going before you commit next year's, that is what a marketing audit is for.