Trusted by UK Project Managers

Online Invoicing Software
for Project Managers

Project Managers invoicing made simple with Simply Invoicing

Online invoicing for UK project managers. Bill day rates, retainers and expenses, add VAT, record payments, attach documents, and export reports to keep bookkeeping accurate and organised.

Start with free plan
No credit card required
Cancel anytime
VAT Ready
Simply Invoicing
Invoice #INV-2024-0847
Project Management (5 days)£1,750.00
Stakeholder Workshops£420.00
Travel & Expenses£85.00

VAT (20%)£451.00
Total Due £2,706.00
🇬🇧 UK Compliant

Simply Invoicing for Project Managers

Simply Invoicing helps UK project managers invoice day rates, retainers, and consulting services. Create invoices quickly, add VAT, track payments, record expenses, attach documents, and keep client records organised for smoother admin and reporting.

No spreadsheets. No complicated accounting systems. Just straightforward invoicing built for Project Managers.

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 Project Managers

Invoice Creation is quick; save Customer details, take Payments, track Expenses, run Reports, attach Documents, and manage Multiple Businesses from one dashboard built for busy UK businesses.

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

Add the client, list day rates or retainer periods, and create an invoice in seconds. Email it, record payments, and export VAT reports. Attach timesheets or documents to keep approvals simple.

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 Project Managers Choose Simply Invoicing

Built for Project Managers, Simply Invoicing keeps billing clear for day rates and retainers. Project Managers can track payments and expenses in one place, helping you stay organised across multiple clients and months.

🧾

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?

Project Managers: join Simply Invoicing to invoice day rates and retainers quickly, add VAT, track payments and expenses, and keep UK client records and reports organised in one dashboard.

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

Frequently Asked Questions

Invoice by day rate with clear dates covered and a short description of services. Add any agreed expenses as separate lines. This keeps approvals fast and avoids disputes over time worked.

Yes, invoice retainers as a single line with the covered period and what is included, such as hours or deliverables. Add out-of-scope work as separate lines. This keeps billing transparent and predictable.

If you are VAT registered, add VAT at your rate and show the VAT amount clearly, including your VAT number. Keep consistent invoice details for reporting. If not registered, do not charge VAT.

Add expenses as separate line items and attach receipts as documents where useful. Include the date and reason for the cost. Clear expense invoicing reduces back-and-forth with clients.

Common terms are 14 or 30 days for business clients, with weekly or monthly invoicing cycles. Always show a due date on the invoice. Track overdue invoices and follow up promptly.

Still have questions?

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

Contact Support

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