SEO budget: how to set one from the work, and defend it

What is an SEO budget?

An SEO budget is the money and time an organisation commits to earning traffic from search engines over a period, usually a year. It covers the people who do the work, in-house or outside, the content they produce, the tools they use, developer time for technical changes, and the upkeep of pages already published.

The budget is the cost side of a decision whose return side is a forecast. How to forecast the traffic honestly is in the SEO forecasting guide, and the SEO ROI Calculator puts the two together month by month.

What an SEO budget pays for

An SEO budget has five lines. Most budgets show two or three of them and pay for the rest without noticing, usually from developers’ and experts’ time.

Line	What it covers	Often missed
People	Strategy, keyword research, briefs, editing, reporting, in-house or outside	The time of whoever manages an agency or freelancers
Content	New pages, updates to existing pages, design and data for them	Updates, which grow with the library
Technical	Developer time for fixes, templates, speed and structured data	Developer time is often treated as free because it sits in another budget
Tools	Keyword research, rank tracking, crawling, reporting	Seats for everyone who needs access
Authority	Digital PR, original research, free tools and other assets that earn links	Expert and design time to make something worth citing

Writing all five lines down, even where the cost sits elsewhere, is what makes a budget honest. An SEO plan that needs forty developer hours a month and has none allocated is not funded, whatever the agency line says.

How much companies spend: the benchmarks that exist

There is no reliable public benchmark for SEO spend as a share of revenue or of marketing. What exists is benchmarks for marketing as a whole, surveys of what SEO providers charge, and opinions.

Figure	What it measures	Source and strength
7.8% of company revenue	Whole marketing budgets in 2026, for 401 marketing leaders, mostly at large companies	Gartner CMO Spend Survey 2026. Surveyed, not SEO-specific
30.6% of marketing budgets	Paid media’s share in 2025	Gartner CMO Spend Survey 2025. Surveyed, not SEO-specific
$501 to $1,000 a month most common; $2,917 average	Monthly retainers charged by SEO providers	Ahrefs survey of SEO providers. Prices charged, not budgets set
5% to 10% of revenue, or at least $8,000 a month	A recommended SEO spend	Bruce Clay, in Search Engine Land. An agency’s opinion

The Gartner figures describe large companies’ whole marketing budgets: the 2026 survey reported marketing budgets rising slightly to 7.8% of revenue, and the 2025 survey put paid media at 30.6% of marketing budgets. Neither breaks out SEO. Bruce Clay’s Search Engine Land article recommends the greater of $8,000 a month or 5% to 10% of revenue for SEO; it is a reasonable view from an agency, not a measurement, and for many small companies 5% of revenue on SEO alone would exceed their whole marketing budget.

Use benchmarks as a sense check on a budget built from the work, not as the budget. A bottom-up number that is a tenth of the marketing budget, or half of it, is worth a second look; a percentage applied to revenue tells you nothing about whether the plan can be delivered.

How to build an SEO budget from the work

A bottom-up budget starts from the plan: how many pages to build and update, what technical work is needed, and who will do it. Each item gets a cost, and the total is the budget. It takes longer than picking a percentage, and it is the only version that tells you whether the money buys the plan.

1. 1PlanFrom the keyword map and the content audit, list the new pages and updates for the year.
2. 2Cost contentEstimate the cost of each new page and each update, including briefs, editing, design and expert time.
3. 3Cost technicalList the technical changes and estimate developer hours.
4. 4Add toolsPrice the tools and seats the team needs.
5. 5Add peopleAdd strategy, management and reporting time, in-house or outside.
6. 6CheckCompare the total with the forecast payback and with marketing-wide benchmarks.

Hypothetical defaults. Replace each cost with your own: what writers, editors and developers actually cost you per hour or per piece.

New pages a monthCost per new page, all-in$Updates to existing pages a monthCost per update$Tools a month$Developer hours a monthhoursDeveloper cost per hour$Strategy, management and reporting hours a monthhoursCost per hour for that work$

Content a month

$4,800

Technical a month

$800

Strategy and management a month

$1,500

Total a month

$7,500

Total a year

$90,000

Content’s share of the budget

64.0%

Count in-house time at its real cost, salary plus overheads, even though it does not appear as a purchase. Authority work, such as digital PR or a free tool, can be added as extra pages or as a separate line.

Two sense checks on the result. First, does the content line cover updates as well as new pages? A library that grows without updates decays. Second, is the technical line realistic? If the plan includes template changes or a migration, ten developer hours a month is not enough.

SEO budgets by stage

What the budget should buy changes with the company’s stage. The amounts depend on the business; the mix is what matters.

Stage	Priorities	Typical mix
Early, searching for fit	A crawlable site and the few commercial pages that match buying searches	Mostly the founder’s or first marketer’s time; tools kept minimal
Early growth	Commercial pages, the first topic cluster, technical foundations	Content and technical; outside help on defined projects
Scaling	More clusters, updates, free tools or research that earn links	Content and updates; in-house lead with outside writers or specialists
Established	Maintaining and improving a large library, new topics, international	A rising share on updates and maintenance; technical for scale

For startups, whether to spend on SEO at all is the first question; the guide to SEO for startups starts with a demand test. For B2B SaaS, the stage-by-stage priorities are in SEO for B2B SaaS: what to do at each stage.

In-house, agency or freelancers: the cost comparison

The same budget buys different amounts of work depending on who does it. Compare on what you get per month and what you keep afterwards, not on the headline price.

In-house

Strengths

• Builds knowledge that stays
• Close to product, sales and data
• Full cost is predictable

Limits

• Hard to hire well for a small programme
• One person cannot cover every skill

Best once SEO is a steady, large part of acquisition.

Agency

Strengths

• Breadth of skills on call
• Can start quickly

Limits

• Retainers often buy less work than they appear to
• Knowledge leaves with the agency unless handover is in the contract

Best with a clear programme and an internal owner.

Freelancers and specialists

Strengths

• Pay for defined pieces of work
• Access to deep skills for a project

Limits

• Someone inside must coordinate and review
• Quality varies

Best for defined projects and for writing alongside an in-house lead.

If you hire an agency, the retainer covers their time, not developer hours or your own team’s time to brief and review. The questions to ask, and how to keep the work if you part ways, are in the guide to choosing a SaaS SEO agency. Google’s page on whether you need an SEO adds a useful warning: no one can guarantee a number one ranking.

A worked example: one company’s budget

Take a hypothetical B2B software company with about $10 million in revenue, a three-person marketing team and no one working on SEO full-time. The figures are invented to show the method.

Its plan for the year, from a keyword map and a content audit, is four new commercial or cluster pages a month, four updates a month to pages already ranking, a technical project in the first quarter to fix templates and internal links, and one free tool in the third quarter. Costed bottom up, with an outside writer, an internal editor’s time, a developer for the first-quarter project and ten hours a month after, and a part-time specialist for strategy and reporting, it comes to roughly $9,000 to $11,000 a month, higher in the first quarter and the third.

Against the sense checks: Gartner’s survey puts large companies’ marketing budgets at about 7.8% of revenue, which for this company would be around $780,000 a year. An SEO budget of about $120,000 a year would be roughly a sixth of that, plausible if organic search is expected to become a main source of pipeline, and worth questioning if it is not. Bruce Clay’s suggested 5% to 10% of revenue, $500,000 to $1 million a year on SEO alone, would be most or all of the marketing budget, which shows why percentage rules need a plan behind them.

The company presents the expected case with a range, shows payback over 24 months with the first two quarters mostly cost, separates its existing organic traffic from what the new work adds, and agrees to review target-query positions and impressions each quarter. When a budget cut comes in the second half, it already knows what goes first: the free tool is delayed, and the updates continue.

How to justify an SEO budget

Finance teams judge SEO budgets on payback, and SEO pays back slowly. Present the budget with a timeline that reflects that, rather than a monthly return that will look poor for the first six months.

• Show payback over 18 to 24 months. Most new pages take months to rank; a monthly view will show cost without return for the first two quarters.
• Separate the baseline from the new work. Existing pages keep earning; the budget should be judged on the extra traffic and conversions it adds.
• Put the return in business terms. Leads, trials or revenue, with a range, not visibility or rankings.
• List the assumptions. Conversion rates, ranking chances, ramp time, with a source and owner for each.
• Compare with the alternative. What would the same results cost in paid search, at your current cost per click?
• Agree the review points. Which leading indicators, such as impressions and target-query positions, will show progress before revenue does.

The forecasting method behind those numbers is in the SEO forecasting guide, and how to report progress against the budget is in the guide to creating an SEO report. For B2B SaaS, where a customer is worth several years of subscription, the economics are in B2B SaaS SEO: the economics, and the pages that carry it.

How to phase an SEO budget over the year

Spend is not best spread evenly. The work that unlocks the rest, technical fixes and commercial pages, belongs early; the work that compounds, clusters and updates, follows.

Q1

Foundations

Technical fixes, the keyword map, and the commercial pages that match buying searches. Highest developer time.

Q2

First cluster

The first topic cluster and its pillar; updates to pages that rank just off the first page.

Q3

Compounding

More cluster pages, an asset that earns links, and the first review of what is working.

Q4

Review and reallocate

Shift spend towards the topics and page types that are working, and plan next year from real numbers.

A phasing to adapt, not a measured standard

When the budget is cut: what to protect

SEO budgets are often cut mid-year. The order in which to cut matters, because some work keeps earning and some is an investment that only pays later.

Area	Cut first	Protect
Content	New pages on topics far from the product	Updates to pages that already earn clicks and conversions
Tools	Tools nobody uses weekly	Search Console, analytics and one core keyword tool
Outside help	Agency hours spent on reporting	Technical fixes that block indexing or break key pages
Process	Authority projects that have not started	The keyword map and brief process, so future work does not duplicate

Cutting all SEO spend is rarely as cheap as it looks. Pages already ranking keep earning for a while, which makes the cut look free, but facts date, competitors publish, and pages nobody maintains tend to slip; restarting later usually means redoing work that steady maintenance would have kept current.

Common SEO budget mistakes

Each mistake below makes a budget either unfundable or undeliverable. Each has the check that catches it.

• A percentage with no plan behind it. Check: can you list what the budget buys, page by page and fix by fix?
• Developer time left out. Check: are developer hours budgeted, or assumed?
• No updates line. Check: is there money for maintaining pages already live?
• Judged monthly. Check: is the payback shown over 18 to 24 months?
• Forecast at the high case. Check: is the plan the expected case, with a range?
• Agency retainer as the whole budget. Check: does it include your own team’s time to brief, review and publish?
• Cutting the wrong things. Check: are updates to earning pages protected?

Build

Plan lists new pages, updates and technical work for the year Each item costed, including expert and editing time Developer hours budgeted explicitly Tools and seats priced

Check

Compared with forecast payback over 18 to 24 months Sense-checked against marketing-wide benchmarks Baseline and new work separated

Run

Spend phased: foundations first Leading indicators agreed for quarterly review Cut order agreed in advance, protecting updates to earning pages

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Working out how much to spend on SEO against the other channels available, and building the case for it, is the kind of question a growth consulting engagement is for. Which few metrics leadership should see across all of marketing is covered in the guide to marketing metrics worth tracking.