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Practical guides for people who work with their hands or their laptops: what to charge, how to invoice, and how to start a service business. No fluff — every post ends with a tool that does the work.

What to charge

Pricing guides for trades and freelancers: how to set rates that cover costs and win work.

How Much to Charge for House Cleaning — Standard vs deep clean pricing, flat vs hourly rates, and how to quote extras without awkward conversations.
How Much to Charge for Lawn Mowing — Per-visit mowing rates, yard-size tiers, frequency discounts, and add-ons that grow the ticket.
How Much to Charge for Pressure Washing — Per-square-foot vs flat-rate pricing, common job ranges, and why your equipment sets your price floor.
How Much to Charge for Plumbing Repairs — Service-call fees, hourly vs flat-rate labor, parts markup, and illustrative prices for common plumbing jobs.
How Much to Charge for Electrical Work — Diagnostic fees, hourly vs flat-rate labor, illustrative job prices, and how to handle permits and panel upgrades.
How Much to Charge for Painting a Room — Per-room vs per-square-foot pricing, what prep really costs, and how paint quality tiers change the quote.
How Much to Charge for Roofing Repair — Per-square pricing explained, repair vs replacement decisions, and the pitch and access factors that move the price.
How Much to Charge for Pest Control — One-time vs quarterly plan pricing, treatment-type ranges, and why recurring plans are the business model.
How Much to Charge for Car Detailing — Detailing package tiers, mobile vs shop pricing, vehicle-size adjustments, and the add-ons that grow tickets.
How Much to Charge for HVAC Service — Diagnostic fees, flat-rate repairs, maintenance plan pricing, and honest parts markup for HVAC businesses.
How Much to Charge for Handyman Work — Hourly rates, minimums and trip charges, half-day pricing, and when a handyman should quote flat instead.
How Much to Charge for Freelance Writing — Per-word, per-project, and hourly writing rates, niche premiums, and revision policies that protect your time.
How Much to Charge for Graphic Design — Hourly vs flat per-deliverable rates, revision policies that prevent endless tweaks, and rush fees.
How Much to Charge for Dog Walking — Per-walk rates by duration, pack walks, add-ons, and weekly packages that build recurring income.
How Much to Charge for Carpet Cleaning — Per-room, per-square-foot, and whole-house pricing plus the add-ons that grow the ticket.

Invoicing explained

The documents of getting paid, explained: invoices, estimates, quotes, receipts, and everything between.

Invoice vs. Receipt: What's the Difference? — An invoice asks for money; a receipt proves it arrived — when to send each and what each must include.
Invoice vs. Quote: What's the Difference? — A quote sets the price before work starts; an invoice collects it after — how the two documents work together.
Estimate vs. Quote: What's the Difference? — An estimate is an educated guess that can move; a quote is a fixed commitment — which to send and when.
Proforma Invoice vs. Commercial Invoice — A proforma invoice previews a deal; a commercial invoice bills it and clears customs — when each applies.
What Is a Purchase Order? — A purchase order is the buyer's official approval to buy — what POs are and how to use their numbers on invoices.
How to Invoice as a Freelancer — The freelancer's complete invoicing system: what to include, W-9/1099 basics, terms that protect you, and getting paid.
How to Invoice for the First Time: A Beginner's Walkthrough — Never billed anyone before? A complete step-by-step walkthrough of your very first invoice.
When to Send an Invoice (and Why Timing Matters) — Invoice the day the work is done — why timing drives payment speed, plus milestone vs. completion billing.
How to Follow Up on an Unpaid Invoice — A polite escalation sequence for overdue invoices: friendly reminder, firm reminder, final notice — with exact wording.
How to Write Invoice Payment Terms — Net 30, deposits, late fees, and early-pay discounts — how to write payment terms that actually get you paid.
What Is Invoice Factoring? — Selling unpaid invoices for immediate cash at a discount — how factoring works, what it costs, and when it makes sense.
Cash vs. Accrual Accounting for Invoicing — Cash accounting records income when paid; accrual when invoiced — how each method changes your books and taxes.
Invoice Numbering Best Practices — Unique, sequential, never reused — numbering schemes with year and client prefixes, and the mistakes to avoid.
Paper vs. Digital Invoices — Digital invoices win on cost, speed, and record-keeping — the honest comparison, plus when paper still makes sense.

Start a trade business

Practical startup guides for service businesses: licensing basics, pricing, first clients, and invoicing.

How to Start a Cleaning Business — Start a cleaning business with low startup costs: licenses, supplies, pricing, and winning recurring clients.
How to Start a Lawn Care Business — Launch a lawn care business: equipment picks, per-visit pricing, and building dense, profitable routes.
How to Start a Plumbing Business — Start a plumbing business the right way: the apprentice-to-master license path, startup costs, and flat-rate pricing.
How to Start an Electrical Contracting Business — Start an electrical contracting business: the journeyman-to-master path, insurance musts, and pricing service calls.
How to Start a Painting Business — Start a painting business on a lean budget: gear, licensing basics, per-room pricing, and photo-driven marketing.
How to Start a Handyman Business — Start a handyman business: license caps to respect, tooling up cheap, hourly pricing, and winning repeat clients.
How to Start a Pressure Washing Business — Start a pressure washing business: the right washer setup, per-square-foot pricing, and upsells that double tickets.
How to Start a Pest Control Business — Start a pest control business: pesticide licensing, training path, and selling recurring quarterly plans.
How to Start a Car Detailing Business — Start a car detailing business: mobile vs. shop, package pricing, and landing fleet clients.
How to Start a Roofing Business — Start a roofing business: height-risk insurance, crew vs. subcontractor math, and estimates that win five-figure jobs.
How to Start a Freelance Writing Business — Start a freelance writing business: pick a niche, build a portfolio, pitch systematically, and price per project.
How to Start a Graphic Design Freelance Business — Start a freelance graphic design business: portfolio, contracts, revision policy, and project pricing.

Reading is good. Getting paid is better.

Every guide on this page ends the same way: a clean invoice, sent fast. Billia's free generator handles the formatting, numbering, and PDF for you.

Create my invoice — free

Start with the cluster that matches where you are: pricing if you're setting rates, invoicing explainers if the paperwork confuses you, startup guides if you're launching. Each post links to the free Billia tool that does the work it describes.

Frequently asked questions

Is the Billia Academy free?

Yes. Every article, calculator, and invoice generator linked from the Academy is free to use with no account required. Generating a document asks for an email so we can send you the PDF — that's it.

Which trades do the pricing guides cover?

The 'What to charge' cluster covers the most common service trades: cleaning, lawn care, pressure washing, plumbing, electrical, painting, roofing, pest control, car detailing, HVAC, handyman work, freelance writing, graphic design, and dog walking.

Are the price ranges in the guides accurate for my area?

Pricing posts give broad illustrative ranges plus the factors that move your price — region, job size, experience, and materials. They're starting points for your own math, not quotes, and each one links to a free calculator so you can run your numbers.

Will new guides be added?

Yes — new guides are added regularly, and every post links to related calculators, glossary definitions, and the free tools so you can go from learning to doing in one click.