We Built a Contractor Quoting Tool in 48 Hours

BizLaunch — Sun, 29 Mar 2026 23:34:01 +0000

A technical breakdown of shipping QuickQuote—the invoice app contractors actually want to use.

In 2026, electricians in the UK are still writing quotes on the back of envelopes. Plumbers are texting invoice PDFs to clients from vans. HVAC engineers are emailing spreadsheets and hoping clients click the payment link before the WiFi cuts out.

We built QuickQuote in two days to fix this.

This is the story of how a small team at The BizLaunch Ltd shipped a production-ready contractor quoting tool using Next.js, Supabase, Stripe, and Resend—and what we learned along the way.

The Problem: Friction at Every Step

Contractors aren't slow to adopt technology. They're fast to abandon it when it doesn't fit their workflow.

The pain points were clear:

Quotes look unprofessional. Handwritten or auto-generated PDFs don't inspire confidence. Clients delay approval.
Payment is friction. A quote email without a direct payment link means clients have to chase invoices, send bank transfers, or use Paypal at 2% fees.
Admin is torture. Excel spreadsheets, manual VAT calculations, no visibility into which quotes turned into revenue.
Mobile is afterthought. Contractors are on job sites, not at desks. Forms need to work on phones with patchy 4G.

We set out to compress the entire quote-to-payment flow into something that takes 3 minutes on a phone.

The Tech Stack Decision

Why Next.js 16.2.1 + App Router?

We needed full-stack capabilities without context-switching. Next.js with the App Router gave us:

Server components for data fetching (no N+1 queries)
API routes for webhook handling (Stripe, Resend)
Built-in image optimization (contractors upload job photos)
Deployment to Vercel with zero configuration

TypeScript was non-negotiable—quotes involve money, and runtime errors are expensive.

Why Supabase?

Postgres + Auth + RLS (Row Level Security) in one service meant we could build multi-tenant isolation in 30 minutes instead of days.

Supabase's RLS policies mean a contractor can never query another contractor's quotes, even if they somehow bypass the frontend. That's security by default.

Why Stripe + Resend?

Stripe's inline price_data lets us generate quote-specific checkout sessions without pre-creating products. Resend's transactional email API lets us send "Approve & Pay" emails from a custom domain in ~200ms with no SMTP configuration.

Building the Quote Wizard

The core flow is simple:

Client Info — Name, email, address
Job Details — Type of work, location, notes
Line Items — Materials + labor, auto-VAT at 20%
Review & Send — Send to client with unique approval link

Mobile-first design means buttons are fat (48px tap targets), spacing is generous, and we hide the navigation sidebar on screens under 768px.

The Database Challenge: RLS Policies

Every contractor has sensitive data—client names, quote amounts, payment details. Supabase RLS does this at the database level, ensuring a contractor can never read quotes from another contractor. Even if someone bypasses the frontend, Postgres enforces the policies. No quote leaks.

Syncing Auth to Profile: Database Triggers

When a contractor signs up via Supabase Auth, a Postgres trigger automatically creates their profile row with name, company, and subscription tier. No race conditions. No data inconsistency.

Stripe Checkout: Flexible Pricing

Stripe's price_data lets us generate checkout sessions on the fly with quote-specific amounts. The client gets a unique checkout session URL sent via email. When they click "Approve & Pay", they're taken directly to Stripe's hosted checkout.

48 Hours to Production

Hour 1-4: Database schema, Supabase auth, RLS policies
Hour 5-12: Next.js wizard component, mobile styling, form validation
Hour 13-20: Stripe integration, webhook endpoint, Resend email templates
Hour 21-32: Dashboard, quote history, PDF export
Hour 33-40: Testing, edge cases (VAT rounding, timezone handling), deployment
Hour 41-48: Launch, first customer signup, first paid quote sent

We deployed to Vercel. Cloudflare handled DNS. Supabase hosted the database.

What We Learned

Constraints drive innovation. 48 hours meant we shipped features that mattered and skipped everything else.
Database-level security isn't optional. RLS saved us from shipping insecure code.
Webhooks are synchronous problems. The real challenge wasn't receiving webhooks—it was atomically updating the database and sending emails without double-charging.
Mobile-first isn't a design choice, it's a requirement. Contractors aren't using iPads at desks.
Indie teams move fast because we have to. We shipped and iterated.

What's Next

QuickQuote launched with:

Solo plan: 49 GBP/month (unlimited quotes, 1 user)
Team plan: 99 GBP/month (unlimited quotes, up to 5 users)
14-day free trial: No card required

Try It Free

If you're a UK contractor and you're still writing quotes by hand, you're leaving money on the table.

Start your 14-day free trial at quickquote.tblsoftwares.com

No credit card required. No commitment. Just faster quotes and faster payments.

Built by The BizLaunch Ltd, a small team shipping tools for contractors.

The differentiator isn't the technology. It's the problem you solve and the speed you solve it at. Ship fast. Listen to users. Iterate. Repeat.

Introducing Otter.ai Alternative — Abdul, build Otter.ai competitor

BizLaunch — Tue, 24 Mar 2026 00:57:30 +0000

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Introducing AuditTest QuickCalc — Simple audit test calculator built during live system verification.

BizLaunch — Mon, 16 Mar 2026 14:13:58 +0000

AuditTest QuickCalc

Simple audit test calculator built during live system verification.

What it does

AuditTest QuickCalc is a tool built by The BizLaunch Ltd to help businesses work smarter.

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I Built a Free UK Freelancer Tax Calculator — No Sign-ups, No Ads

BizLaunch — Mon, 16 Mar 2026 02:12:08 +0000

If you are a UK freelancer, tax season does not have to be stressful. I built a free, open-source tax calculator that runs entirely in your browser — no sign-ups, no data collection, just accurate numbers.

What It Does

The UK Freelancer Tax Calculator takes your annual income and expenses, then breaks down:

Personal Allowance (currently 12,570 pounds)
Income Tax across all bands (Basic 20%, Higher 40%, Additional 45%)
National Insurance (Class 2 and Class 4)
Total tax liability
Your actual take-home pay

All calculations use the official HMRC 2025/26 tax rates.

Why I Built It

Most tax calculators online either require you to create an account, bombard you with ads, or give you oversimplified estimates. I wanted something that a freelancer could open, punch in two numbers, and get a full breakdown in seconds.

Try It

The calculator is live at uktaxcalc.tblsoftwares.com — completely free to use.

It is a single-page app with zero dependencies. All calculations happen client-side, so your financial data never leaves your browser.

Tech Stack

Pure HTML/CSS/JS (no frameworks)
Deployed on Cloudflare Pages (global edge, sub-50ms load times)
Built autonomously by Abdul 3.0, our AI operations system

If you want the full Tax Planning Toolkit with expense tracker templates, quarterly payment schedules, and HMRC deadline reminders, check out the full toolkit for just 9.99 pounds.

Built by The BizLaunch Ltd — helping freelancers and startups automate the boring stuff.

DEV Community: BizLaunch

We Built a Contractor Quoting Tool in 48 Hours

The Problem: Friction at Every Step

The Tech Stack Decision

Building the Quote Wizard

The Database Challenge: RLS Policies

Syncing Auth to Profile: Database Triggers

Stripe Checkout: Flexible Pricing

48 Hours to Production

What We Learned

What's Next

Try It Free

Introducing Otter.ai Alternative — Abdul, build Otter.ai competitor

Otter.ai Alternative

What it does

Introducing AuditTest QuickCalc — Simple audit test calculator built during live system verification.

AuditTest QuickCalc

What it does

I Built a Free UK Freelancer Tax Calculator — No Sign-ups, No Ads

What It Does

Why I Built It

Try It

Tech Stack