The main difference between in house SEO and an SEO agency is how your SEO work is resourced.

An in house SEO professional is a full-time employee who works within your business. Depending on their experience, they may manage your SEO strategy, technical SEO, keyword research, content marketing, Google Analytics, on-page work and link building.

Hiring an SEO agency gives you access to an external SEO team. Instead of relying on one SEO expert, your business can draw on the collective expertise of SEO specialists working across technical SEO, content creation, search engine optimisation, link building, analytics and other areas of digital marketing.

This distinction matters because modern SEO isn't a single skill.

Improving a website's performance across Google, other search engines, AI search and answer engines can require technical knowledge, content skills, data analysis, industry knowledge and ongoing testing.

A good in house SEO expert may have strong skills across several of these areas. An agency team, however, can offer broader expertise because different SEO professionals can contribute to different parts of an SEO campaign.

Comparing an SEO agency fee with the salary of an in house SEO specialist doesn't give you the full picture.

Hiring internally means paying salary, superannuation, leave, recruitment expenses, equipment, ongoing training and SEO tools. Depending on your SEO strategy, your in house employee may also need support from developers, writers, graphic designers or other members of your marketing team.

An SEO agency generally charges a monthly retainer or project fee. That fee may provide access to an entire team and advanced tools without the employment costs and management overhead associated with hiring internally.

Here is an indicative comparison for Australian businesses:

These figures are indicative rather than fixed Australian industry rates. Salaries and agency pricing vary according to experience, location, website size, competition and the SEO services required.

An SEO agency can be more cost effective when your business doesn't have enough SEO work for a full-time employee or needs specialised expertise across several areas.

Imagine hiring an in house SEO specialist on a $100,000 salary. Once superannuation, recruitment, software, equipment, leave and training are included, the real annual cost is considerably higher.

You may then need additional people for content creation, development, design or digital PR.

That fee may give you access to several skilled SEO professionals rather than one employee.

That doesn't automatically make agency SEO better.

If your business has enough SEO projects and ongoing work to occupy an SEO professional five days a week, it may make more sense to hire internally.

One of the biggest reasons to choose in house SEO is direct control.

An internal SEO becomes part of your company and can develop detailed knowledge of your products, customers, competitors, business priorities and internal processes.

Your in house SEO professional can also work closely with your existing team. They can speak directly with developers, content writers, graphic designers, sales staff and the broader marketing team.

This can be particularly useful for businesses where SEO influences daily website decisions.

An internal team can also react quickly when priorities change. Your SEO expert doesn't have multiple clients competing for their time, so their attention remains on your business.

For companies operating in specialised or competitive industries, that deep industry knowledge can be valuable.

The main challenge is cost.

A skilled in house SEO expert requires a competitive salary, superannuation, equipment, SEO tools and ongoing training. There is also the internal hiring process and the time required to find the right person.

You are also relying heavily on one individual's skills.

Search engine optimisation covers technical SEO, keyword research, content marketing, link building, analytics, AI search and more. Finding one in house SEO professional with deep expertise in every discipline can be difficult.

You may eventually need to hire employees around that person, turning one SEO hire into an in house SEO team.

Staff turnover is another consideration. If your SEO specialist leaves, valuable knowledge can leave with them and you may need to restart the recruitment process.

The major benefit of hiring an SEO agency is access to collective expertise.

Rather than depending on one person, agency teams can include technical SEO specialists, content professionals, strategists, link building specialists and account managers.

Because agencies work across multiple clients and various industries, they can also gain exposure to a wider range of SEO campaigns, website problems and search engine changes.

Good external agencies invest in advanced tools and ongoing training because SEO is their core service. This can give clients access to software and specialised expertise that may be expensive to maintain internally.

An SEO agency can also scale its resources as your priorities change.

One month may require technical SEO work. Another might focus heavily on keyword research and content creation. A later stage of the campaign might place greater emphasis on link building or improving organic traffic to commercially important pages.

That flexibility can be difficult to replicate with one full-time employee.

One of the biggest advantages of working with an SEO agency is the depth and breadth of experience that comes from working across multiple clients, industries and business models.

An in house SEO professional may develop deep knowledge of one company and its market. Agency SEO specialists, on the other hand, can work across local businesses, B2B companies, online retailers, national brands, international websites and large enterprise organisations.

That exposure matters. Different industries present different search challenges. A local trades business trying to rank in Melbourne requires a very different SEO strategy from an international company targeting customers across several countries. The same applies to a B2B company with a long sales cycle compared with an online retailer managing thousands of product and category pages.

Agency teams can bring lessons from SEO campaigns across various industries to new SEO projects. They have often seen technical problems, competitive search environments and content challenges before, which can help them identify opportunities and avoid repeating strategies that haven't produced results elsewhere.

Working with an agency can also give your business access to specialists with experience in specific SEO services rather than relying on one in house SEO expert to cover every discipline.

Local SEO Services

Local SEO Services focus on helping businesses improve their visibility for location-based searches. This can include Google Business Profile optimisation, local keyword research, location pages, citations and strategies designed to increase visibility among customers searching within specific Australian suburbs, cities or service areas.

For businesses with physical locations or defined service areas, working with SEO professionals who understand local search can make a significant difference to the quality of organic traffic and enquiries.

AI SEO Services

AI SEO Services focus on how businesses appear across AI search and answer engines as search behaviour changes.

This requires an understanding of how content, website structure, authority and brand signals can support visibility beyond traditional search engine results. An agency working across multiple clients can gain practical experience as AI search develops and apply those learnings across different industries.

International SEO Services

International SEO Services are designed for businesses targeting customers across multiple countries, languages or regions.

International SEO can involve complex decisions around website structure, hreflang implementation, localisation, keyword research and country-specific search behaviour. Access to SEO specialists with international experience can be particularly useful when expanding into markets where your internal team has limited search knowledge.

Enterprise SEO Services

Enterprise SEO Services address the SEO requirements of large and complex websites.

Enterprise SEO projects can involve thousands or millions of URLs, multiple stakeholders, development teams, technical systems and strict publishing processes. An experienced agency team can provide the technical SEO knowledge and additional resources required to manage SEO at this scale while working with existing internal teams.

B2B SEO Services

B2B SEO Services focus on reaching business decision-makers through organic search.

B2B keyword research and content marketing can differ significantly from consumer SEO. Search volumes may be smaller, sales cycles can be longer and a single qualified lead may carry considerable commercial value. SEO agencies with B2B experience can build campaigns around search intent, subject expertise and lead quality rather than focusing solely on traffic numbers.

Ecommerce SEO Services

Ecommerce SEO Services address the search challenges faced by online retailers, including category optimisation, product pages, site architecture, internal linking, technical SEO and large product catalogues.

Online stores can have thousands of competing pages and frequently changing products, making SEO considerably different from optimising a smaller service-based website. Agency teams with online retail experience can apply specialist knowledge to improve category visibility, product visibility and organic revenue.

The benefit isn't simply having more people available. It is having access to SEO specialists who have worked on different types of websites, SEO campaigns and business models.

Rather than expecting one in house SEO professional to be an expert in local, international, enterprise, B2B and AI search, your business can draw on the collective expertise of an agency team as your SEO priorities change.

Yes. The quality of agencies varies.

Choosing the wrong agency can mean poor communication, unclear SEO work, weak reporting or a strategy that doesn't match your business goals.

An external agency also doesn't live inside your business every day. It needs time to learn your products, customers, industry and internal processes.

Ask who will actually work on your account before signing a contract. Find out whether you will have access to experienced SEO professionals or communicate mainly through account managers.

You should also understand exactly which SEO services are included.

A good SEO partner should be able to explain its proposed SEO strategy, the work being completed and how that work relates to your company's growth.

Choosing SEO in house can make sense when your business has substantial, ongoing SEO requirements.

You may want to hire internally if:

• SEO requires daily attention across a large website
• Organic traffic is a major source of revenue or leads
• Your internal team already includes developers and content professionals
• You need close coordination between SEO and other digital marketing activity
• Your industry requires extensive specialist knowledge
• You have enough ongoing SEO work to justify a full-time employee
• You want direct control over your SEO efforts

Larger organisations may eventually build an entire in house SEO team rather than relying on one person.

That team could include an SEO manager, technical SEO specialist, content specialists and other SEO professionals.

An SEO agency may make more sense when you want specialised expertise without building an entire team internally.

Many businesses hire an agency when they:

• Don't have an existing internal SEO team
• Need a new SEO strategy
• Want to increase organic traffic
• Are launching or rebuilding a website
• Need technical SEO support
• Require ongoing keyword research and content marketing
• Want help with link building
• Operate in competitive industries
• Need support for specific SEO projects
• Want access to skilled SEO professionals without hiring several employees

An agency can also be useful when SEO is important to business success but there isn't enough work to justify a dedicated full-time employee.

For Australian SMEs in particular, this can make an SEO agency a cost-effective way to access a broader range of skills.

Yes. It doesn't have to be a choice between one or the other.

Many businesses use a hybrid model where an internal SEO or marketing team works with an external SEO partner.

Your in house team might manage business priorities, internal communication and day-to-day implementation, while the agency provides specialised expertise for technical SEO, content strategy, link building, website migrations or major SEO projects.

This model can also help an internal SEO professional access broader expertise without needing to hire employees for every specialist role.

For example, your in house SEO may understand your business and website exceptionally well but need agency support for a complex migration or large-scale technical audit.

Clear responsibilities are essential. Both teams should know who owns strategy, implementation, content creation, reporting and approvals.

Start with your business goals rather than the employment model.

How much SEO work do you actually need each month? What skills are required? Does the work require one SEO expert or several specialists? How closely does SEO need to work with your internal team?

You should also consider the next two or three years rather than only your immediate requirements.

If search engine optimisation is central to your company's growth and requires daily work, building your own SEO team could be a sensible long-term SEO investment.

If you need specialised expertise across technical SEO, content marketing, link building, analytics and AI search but don't require several full-time employees, an agency may provide better value.

For some businesses, hiring an agency first and building internal SEO capabilities later can also make sense.

Is it better to hire an in house SEO or an SEO agency?

Neither option is automatically better. An in house SEO can offer direct control, close collaboration with your marketing team and detailed business knowledge. An SEO agency can provide broader expertise and access to multiple SEO specialists without the cost of employing an entire team.

The right option depends on your business goals, budget and volume of ongoing SEO work.

Is it cheaper to hire an SEO agency?

It can be. Hiring an SEO agency may save money when your business needs a range of SEO skills but doesn't have enough work for several full-time employees.

Compare the complete annual cost of an in house employee with the agency fee rather than comparing salary and monthly retainer alone.

How much does an SEO agency cost in Australia?

SEO agency fees in Australia vary based on the scope of work, website size, competition and services required. As an indicative range, ongoing SEO services may cost approximately $2,000 to $10,000+ per month.

Businesses in highly competitive industries or those with large websites may require a larger SEO investment.

What does an SEO agency do?

An SEO agency helps improve a website's visibility across search engines and, increasingly, AI search and answer engines.

SEO services may include SEO strategy, technical SEO, keyword research, content creation, content marketing, link building, analytics, competitor research and work designed to grow qualified organic traffic.

What does an in house SEO specialist do?

An in house SEO specialist manages search engine optimisation from within your business.

Their SEO work may include technical audits, keyword research, content planning, on-page improvements, reporting, working with developers and monitoring the website's performance through tools such as Google Analytics.

When should I hire an in house SEO professional?

Consider hiring in house when you have enough ongoing SEO work to justify a full-time employee and need someone closely connected to your internal team.

It can be particularly useful when SEO is a major source of customers and requires frequent coordination with developers, content teams and other marketing staff.

When should I hire an SEO agency?

Consider an SEO agency when you need broader expertise, don't have an internal SEO team or require several specialist SEO services without hiring multiple employees.

An agency may also suit businesses that want to start SEO work quickly without going through a lengthy internal hiring process.

Can an SEO agency work with my existing marketing team?

Yes. An agency can work as an extension of your existing team rather than replacing it.

Your marketing team can retain ownership of brand and business priorities while the SEO partner provides specialist search knowledge, technical advice, content direction and campaign support.

Does SEO still matter with AI search and answer engines?

Yes. Search behaviour is changing, but websites still need technically sound pages, useful content, clear subject expertise and strong online authority.

A modern SEO strategy should consider traditional search engines alongside AI search and answer engines rather than treating them as completely separate channels.

Still weighing up hiring in house SEO vs an SEO agency?

Before committing to a new full-time employee or an agency contract, work out how much SEO work your business needs, which skills you already have internally and where the gaps sit.

The cheapest option on paper isn't necessarily the most cost effective. The better SEO investment is the one that gives your business the people, expertise and resources needed to improve your website's performance and grow qualified organic traffic.