Trusted by UK Marketing Agencies

Online Invoicing Software
for Marketing Agencies

Run your agency billing with Simply Invoicing

Simply Invoicing helps UK marketing agencies invoice retainers and campaigns, track payments, manage customers, log expenses, store documents, and export VAT-ready reports for easier bookkeeping.

Start with free plan
No credit card required
Cancel anytime
VAT Ready
Simply Invoicing
Invoice #INV-2024-0847
Monthly Retainer – Marketing Support£1,200.00
Campaign Setup & Management£650.00
Content Production£450.00

VAT (20%)£460.00
Total Due £2,760.00
🇬🇧 UK Compliant

Simply Invoicing for Marketing Agencies

Simply Invoicing keeps agency billing simple and clear. Invoice retainers, projects and campaigns, track paid and overdue invoices, store client details, record expenses, keep documents together, and export reports—so you always know what’s billed and due.

No spreadsheets. No complicated accounting systems. Just straightforward invoicing built for Marketing Agencies.

VAT-ready invoices
Service-based invoicing
Products & Services
Store customer details
Share with accountant
Track income & expenses
10K+
Invoices Created
98%
Customer Satisfaction
2min
Average Invoice Time
£2M+
Invoiced Monthly

Features That Matter for Marketing Agencies

Invoice creation in seconds, customer management, payment tracking, expense capture, reporting, and document storage. Send quotes and credit notes, run multiple businesses, and export records for your accountant.

Detailed Service Invoices

Create clear invoices with breakdowns for labour, mileage, materials and additional services.

Flexible Invoice Creation

Create and edit invoices anytime. Save drafts, duplicate previous invoices and customise line items easily.

VAT Calculation

Automatic VAT calculation using UK-compliant rates. Generate VAT-ready invoices instantly.

Expense Tracking

Log business expenses, receipts and operational costs. Keep everything organised for tax time.

Customer Database

Store customer names, addresses and contact details for faster invoice creation.

PDF & Link Sharing

Send invoices as professional PDFs or secure shareable links. Customers can view and pay online.

How It Works

Set up your business details, add clients, then invoice retainers or campaigns with clear line items. Send by email, track payments, record expenses, and download reports for tax and VAT.

01

Sign Up

Create your account and get started in minutes.

02

Add Customers

Save customer details for quick and easy billing.

03

Create Invoice

Add services or products and generate a professional invoice.

04

Send & Track

Send invoices and keep track of paid, pending, and overdue statuses in one place.

Why Marketing Agencies Choose Simply Invoicing

Marketing Agencies need invoices that match scopes, retainers and payment terms. Simply Invoicing keeps clients, invoices and payments together, helping you reduce admin and improve cashflow.

🧾

Branded Professional Invoices

Create clean, professional invoices with your logo and business details in seconds.

💼

Simple Payment Management

Record payments, track invoice status and keep full visibility of what’s paid and what’s outstanding.

📈

Clear Financial Overview

Monitor income, expenses and business performance from one organised dashboard.

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Customer Database

Store customer details securely and generate invoices faster with saved information.

Smart Invoice Tracking

See which invoices are pending or overdue and stay in control of your cash flow.

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Expense & Cost Tracking

Log business expenses and keep everything ready for your accountant at tax time.

Ready to simplify your invoicing?

Marketing Agencies—join Simply Invoicing to invoice retainers fast, track payments, and keep UK VAT and reporting organised as you scale.

No credit card required  •  Upgrade anytime  •  Start with free plan

Frequently Asked Questions

Both are common. Retainers work for ongoing support, while campaigns suit fixed deliverables. Simply Invoicing lets you itemise work clearly so clients understand what they’re paying for.

List third-party costs as separate lines so clients can see pass-through costs clearly. Keep receipts in your records to support your bookkeeping and reconciliation.

If you’re VAT-registered and VAT applies, your invoices should show VAT rate, VAT amount, and your VAT number. Simply Invoicing totals VAT and supports VAT-ready reports.

Use clear payment terms, set due dates, and track overdue invoices in one dashboard. Sending reminders early and keeping notes improves follow-ups and cashflow.

Typical costs include software subscriptions, contractors, ad tools, travel, and equipment. Tracking expenses regularly helps you understand margins and prepare clean reports.

Still have questions?

Our support team is here to help. Get in touch with us anytime.

Contact Support

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