What Information Should an Invoice Include?

Pricing services is difficult because you are not simply adding a markup to a physical product. Your price may need to cover your time, employees, software, travel, administration, revisions, risk, taxes, and profit. If you forget part of that cost, a project that looks profitable can become disappointing very quickly.

A professional quotation should show the customer a clear price, but the calculation behind that price begins before you create the document.

Start with the real scope of work

Do not price a vague project. First define what the customer expects you to deliver. Ask questions about deliverables, volume, deadline, revisions, meetings, support, travel, materials, third-party costs, and handover requirements.

The clearer the scope, the easier it is to create a price that protects both sides.

Calculate the direct time required

Estimate how many hours the work will take. Include not only the visible production time but also planning, communication, project management, revisions, testing, and administration.

If you charge £60 per hour and expect 20 hours of work, the obvious starting point is £1,200. But that may not yet be the final price.

Include business overhead

Your hourly rate needs to support expenses that cannot always be charged directly to one client. Examples include software subscriptions, insurance, accounting, office costs, marketing, equipment, training, and non-billable administration.

If you price only your visible working hours without considering overhead, your business may be busy without being profitable.

Include project-specific expenses

Some costs belong directly to the project: stock photography, printing, subcontractors, travel, paid data, domain fees, shipping, or specialist equipment rental.

Decide whether these costs are included in your service price or shown separately in the quotation.

Add a reasonable profit margin

Profit is not the same as paying yourself for your time. Profit gives the business room to invest, survive slow periods, replace equipment, and grow.

There is no universal margin that fits every service business. Your market, risk, specialization, demand, and cost structure all matter.

Hourly pricing vs fixed pricing

Hourly pricing

Hourly pricing is straightforward when the amount of work is uncertain. The customer pays for the actual time used, usually within an agreed estimate or limit.

Fixed project pricing

Fixed pricing gives the customer certainty. You calculate the expected work internally and quote one project price. It works best when the scope is clearly defined.

Value-based pricing

Some services can be priced partly according to the value they create rather than only the hours required. A specialist may solve a high-value problem quickly because of years of experience.

Value-based pricing requires a strong understanding of the customer’s situation and is more complex than simply multiplying hours by a rate.

Build a contingency for uncertainty

If the project contains genuine uncertainty, include an appropriate allowance or define what is outside the quoted scope. Do not simply add a hidden amount without understanding why.

A better approach may be to break uncertain work into a discovery phase followed by a more accurate quotation.

Example service price calculation

Component	Example
Estimated work	20 hours × £60 = £1,200
Project expenses	£150
Risk/contingency	£150
Base commercial price	£1,500

This is only an illustration. Your actual pricing method should reflect your costs and business model.

How much detail should the quote show?

You do not need to reveal your entire internal cost calculation. The customer needs enough detail to understand what they are buying. For example, show discovery and planning, design and production, and final revisions as separate commercial lines.

This is clearer than a single unexplained line saying “Project — £1,500.”

State what is included

Pricing problems often come from scope problems. Your quote should explain important inclusions such as the number of concepts, meetings, revisions, pages, sessions, or support hours.

If something significant is excluded, say so. Clear exclusions are often more useful than pages of legal wording.

Use a validity period

If supplier costs or availability can change, do not leave a quotation open forever. Add a valid-until date so the customer knows how long the price is available.

The Quotation Generator includes a validity date, and our professional quotation guide covers the other important details.

Do not discount automatically

Some businesses reduce the price as soon as a customer hesitates. Before discounting, ask why. The issue may be scope, timing, trust, or budget structure rather than the headline price.

If you give a discount, make sure the project still makes commercial sense. You can also reduce scope instead of reducing the value of the same work.

Ask for a deposit when appropriate

A deposit can improve cash flow and confirm commitment, especially for custom projects. State the amount and timing clearly in the quotation or agreement.

Turn the accepted quote into an invoice

After acceptance and completion of the agreed billing stage, the quotation can guide the invoice. Descriptions and prices should stay consistent unless changes were approved.

If you need help understanding the documents, read invoice vs quotation.

Create your service quotation

Add services, quantities, rates, taxes, discounts, validity date, and terms in a clear professional format.

Create a Quotation

Common pricing mistakes

• Forgetting non-billable project time.
• Ignoring overhead.
• Quoting before the scope is clear.
• Offering unlimited revisions accidentally.
• Absorbing third-party costs.
• Reducing price without reducing scope.
• Not updating old rates.

Frequently asked questions

Should I show my hourly rate in a quotation?

You can if you bill hourly. For fixed-price projects, deliverable-based prices may be clearer.

How do I avoid undercharging?

Define the scope, estimate all work, include overhead and direct costs, allow for reasonable risk, and make sure the final price includes profit.

Should tax be included?

Follow the rules and commercial conventions that apply to your business. If tax is added separately, show it clearly.

Final thoughts

A good service price starts with scope, not with a guess. Understand the work, calculate the real time and costs, add a sustainable margin, explain the offer clearly, and protect yourself from uncontrolled scope changes. The goal is not to be the cheapest quote; it is to offer a price you can confidently deliver at.