Micro-SaaS Ideas a Solo Founder Can Actually Ship

A phone-first app that auto-detects drives, classifies them as business or personal, and exports an HMRC-ready mileage claim.

The problem: Sole traders forget to log trips and then guess at year end, losing real tax relief or risking a wrong claim.

Difficulty

Low

Time to MVP

3-4 weeks

How it makes money

Flat subscription around 4 to 6 pounds per month, billed annually before the tax deadline.

First step

Post in two sole-trader and bookkeeping subreddits asking how people currently track mileage, then build for the most common gap.

Build it with Supabase, Stripe

Caterers enter dishes once and the tool generates compliant allergen matrices, printable labels and a public allergen page.

The problem: Natasha law allergen rules are strict, but small kitchens manage them in messy spreadsheets that go stale the moment a recipe changes.

Difficulty

Low

Time to MVP

4-5 weeks

How it makes money

Per-venue subscription around 15 pounds per month, sold direct to independent cafes and bakeries.

First step

Walk into five local cafes and ask to see how they record allergens today, then mock up the matrix they wish they had.

Build it with Turso, Lemon Squeezy

A focused rota tool where staff post shifts they cannot work and managers approve swaps in one tap, with WhatsApp alerts.

The problem: Small pubs and restaurants run rotas over group chats, so swaps get lost and shifts go uncovered.

Difficulty

Medium

Time to MVP

5-6 weeks

How it makes money

Per-location subscription around 20 pounds per month, with a free single-rota tier as the funnel.

First step

Offer to run one venue rota manually for a fortnight and note every swap request that goes wrong.

Build it with Neon, Clerk

A single workflow for small hire firms to log kit out, capture condition photos, and settle deposits with a clear paper trail.

The problem: Party, tool and camera hire businesses argue with customers over damage because they have no timestamped before-and-after record.

Difficulty

Medium

Time to MVP

5-6 weeks

How it makes money

Tiered subscription from 25 pounds per month by number of active hires, plus a small per-booking fee.

First step

Interview three local hire firms about their worst deposit dispute and design the evidence flow that would have settled it.

Build it with Cloudflare, Supabase

Electricians and plumbers build a branded quote on site, the customer accepts it on their phone, and it converts to an invoice automatically.

The problem: Tradespeople lose jobs to slow quoting and then chase payment because quote, job and invoice live in three disconnected places.

Difficulty

Medium

Time to MVP

5-7 weeks

How it makes money

Per-user subscription around 18 pounds per month, sold one trade at a time through referrals.

First step

Shadow one electrician for a day, time how long quoting takes, and prototype the on-site accept button.

Build it with Stripe, Resend

Brokers import policy end dates and the tool sequences reminder emails and call tasks so no client renewal slips through.

The problem: Small brokerages track renewals in spreadsheets, so they miss the window and lose commission to a competitor who got there first.

Difficulty

Low

Time to MVP

3-4 weeks

How it makes money

Per-seat subscription around 30 pounds per month, justified by a single saved renewal paying for the year.

First step

Ask two independent brokers for an anonymised renewal list and calculate the commission they lost to late follow-up.

Build it with Resend, Supabase