Late-invoice tracker with UK/EU statutory interest calculator & reminders
InvoiceLaw helps freelancers and small businesses get paid on time. What it does: Tracks invoices and highlights overdue ones on a dashboard Calculates statutory interest + fixed compensation (UK Late Payment Act 1998, EU Directive 2011/7/EU), plus contract late fees for the US Generates a 5-step reminder sequence, from a friendly heads-up to a final notice, with the real numbers filled in Shareable client invoice page with an "I've sent the payment" button Insights: who pays late, average days late Free plan (5 invoices) + Pro plan ($19/mo, $190/yr), enforced in the database Tech: Static HTML/JS frontend on Netlify (no build step, easy to modify) Supabase (Postgres + Auth) with Row Level Security Automatic reminder emails: Supabase Edge Function + Brevo already written, needs a custom domain to switch on Landing page, live demo (no signup), 45-second product video, ad creatives, terms/privacy/refund pages Honest status: Pre-revenue, no paying users yet. Launched October 2026. Payments currently via PayPal payment links with manual Pro activation. Easy to replace with Stripe or Paddle. Why I'm selling: I built it but don't have the time or budget to market it in the UK/EU. It's a good fit for someone with a freelancer audience, an accounting business, or marketing experience. What's included: Full source code + database schema + Edge Functions Transfer of the Netlify and Supabase projects Ad images, video and marketing copy Handover notes and help with the transfer
Next step: <p>1. Buy a custom domain and switch on the automatic email reminders (the code is already written).</p><p>2. Add Stripe for automatic subscriptions.</p><p>3. Market to UK freelancers: content around the new UK Commercial Payments Bill, which makes late-payment interest hard to exclude.</p><p>4. Add integrations with Xero, QuickBooks or FreshBooks to import invoices.</p><p>5. Add country pages for SEO (UK, Germany, France and others).</p>
For sale
Asking price: $1,500 USD
What's included
Source code, All related design work, All related data
Transfer of the Netlify site and the Supabase project (database, auth, Edge Functions), the 45-second product video, Facebook/Instagram ad creatives, marketing copy, and handover notes. I will help with the transfer.
Reason for selling
I feel that the project requires skills that I do not necessarily have and would like to see someone else take over.
Project metrics
Average Monthly Visitors: Pre-launch
Average Monthly Revenue: Pre-revenue
More side projects like InvoiceLaw
FluxMail Outreach
- All-in-one email sales SaaS with automation, analytics and Chrome extension.
Vitaay
- Vitaay is an AI-powered influencer marketing platform
Omni AI
- Create AI videos and images from text or photos, free credits to start.
RemoveText.video
- Remove text, subtitles, captions and logos from videos without cropping.
SideProjectors is a marketplace where developers can sell, buy, and showcase side projects and find co-founders. The platform lets you list projects for sale, discover projects to buy, seek co-founders, and share projects with the community.