Every “must-have tools for entrepreneurs” post seems to recommend a dozen paid subscriptions, adding up to hundreds a month before you’ve made a single sale. That’s not realistic for most solo sellers just starting out. Here’s a more honest breakdown of what running a one-person business on software actually costs, at three different stages.

Stage 1: Just starting (£0/month)

At this stage, the free tiers covered elsewhere on this site are genuinely enough:

• Email marketing: Kit free plan (up to 10,000 subscribers) — £0
• Client/contact tracking: HubSpot free CRM — £0
• Design: Canva free tier — £0
• Selling platform: Etsy (pay-per-listing only, no subscription) or a free Shopify trial — £0 upfront
• International payments: Wise personal account — £0 to open, small fee only per transfer

Total fixed monthly cost: £0. The only costs at this stage are small, per-transaction fees — not subscriptions.

Stage 2: Getting consistent sales (~£30-60/month)

Once there’s real, repeatable income, a few upgrades typically start paying for themselves:

• Website hosting (if self-hosting rather than a free platform): ~£5-10/month
• Domain name: ~£1/month averaged over the year
• Shopify Basic (if you’ve moved off Etsy or added your own store): ~£25-30/month
• Kit or HubSpot upgrade (only once you’ve hit the free tier’s limits): ~£15-25/month

Total: roughly £30-60/month — still modest, and each upgrade should be justified by the limit it’s actually solving, not bought “just in case.”

Stage 3: Established and scaling (~£100-200+/month)

At this point you’re running the business more seriously, and paying for genuine efficiency and reliability:

• Managed hosting (WP Engine or similar, once downtime would cost real money): ~£25-35/month
• Full CRM/marketing automation: ~£40-80/month
• SEO/marketing toolkit (Semrush or similar, once content marketing is a core growth channel): ~£100+/month
• Course platform (if selling a course, Thinkific paid tier): ~£30-40/month

Total: £100-200+/month, but by this stage the business is generating revenue that comfortably covers it — the tools are paid for by the business, not out of your own pocket speculatively.

The pattern worth taking from this

Notice the shape: £0 → modest → higher, always trailing behind actual revenue rather than leading it. The biggest financial mistake solo sellers make isn’t picking the “wrong” software — it’s paying for stage 3 tools while still operating at stage 1 revenue. Upgrade when a specific free-tier limit is actually blocking you, not because a “best tools” article told you to.

This post doesn’t contain any affiliate links — it’s meant as a planning reference, not a sales pitch. See our individual reviews for links to each tool mentioned.

Most “free plan” software is designed to frustrate you into upgrading — deliberately capped at a point just below what you actually need. But not all of it. Some free tiers are genuinely built to last, not just to hook you.

Here are five where that’s actually true, and where we’d tell you to stay on the free plan rather than pay before you need to.

1. Kit (ConvertKit) — Email marketing

Kit’s free plan supports up to 10,000 subscribers with unlimited sends and unlimited landing pages — a genuinely permanent tier, not a trial. Most solo creators won’t outgrow it for months, sometimes years. Read our full Kit review for the details on where it does eventually run out.

2. HubSpot CRM — Contact and deal tracking

The free CRM tier includes unlimited users and unlimited contact/deal tracking. If you’re doing any kind of client work, this alone can replace a messy spreadsheet at zero cost. The paid tiers only matter once you’re running real marketing automation.

3. Wise (personal account) — Currency conversion

You don’t need Wise Business to benefit from the real exchange rate — a free personal account already gets you cheap, transparent currency conversion for paying international subscriptions or the odd freelancer invoice.

4. Google Workspace’s free tools — Docs, Sheets, Forms

Easy to overlook because it’s not “new,” but Google’s free suite covers invoicing templates, basic bookkeeping spreadsheets, and client intake forms without needing a single paid tool. Most solo sellers only need a dedicated paid tool once volume genuinely demands it.

5. Canva (free tier) — Basic design

For solo sellers who need the occasional social graphic, product mockup, or simple flyer, the free tier of Canva covers a surprising amount before Canva Pro’s extra templates and brand kit features become worth paying for.

The pattern worth noticing

Every tool on this list follows the same shape: the company makes money from businesses that grow into needing more, not from squeezing solo users on day one. That’s usually a sign the company is playing a long game — earn your trust for free, then earn your money once you’ve genuinely outgrown the free tier. Software worth paying for tends to be the same software that was honest with you about not needing to pay yet.

This post doesn’t contain any affiliate links — we’d rather point you to what’s genuinely free than push an upgrade you don’t need yet.