Net 45 Payment Terms: A Complete Guide for Small Businesses

Among the various payment terms you'll encounter as a business owner, Net 45 sits in the middle ground — longer than the standard Net 30, but not as extended as Net 60. It's a term that works well in certain industries and client relationships, but requires careful cash flow planning.

This guide covers everything you need to know about Net 45: what it means, how it compares, who uses it, the pros and cons, and how to set it up properly so you get paid on time.

What Does Net 45 Mean?

Net 45 means the client has 45 calendar days from the date the invoice is issued to make full payment.

The "Net" refers to the total amount owed after all adjustments. The "45" is the number of days in the payment window.

Example: You issue a Net 45 invoice on April 1, 2026. Counting forward 45 days:

• April has 30 days → 29 days remaining in April after April 1
• 45 - 29 = 16 days into May
• Due date: May 16, 2026

On May 17, the invoice is officially overdue.

Statista reports that the average DSO (Days Sales Outstanding) for US small businesses is around 45 days — meaning Net 45 aligns closely with actual average payment behavior in many industries.

Net 45 vs. Net 30 vs. Net 60: Comparison Table

The key takeaway: Net 30 is the baseline. Net 45 and Net 60 are progressively longer terms that accommodate clients with more complex payment workflows — but they also require more active follow-up from you.

Industries That Commonly Use Net 45

Net 45 is particularly prevalent in industries where:

Construction and Trade Services

General contractors frequently pay subcontractors on Net 45 terms. The workflow typically involves: the contractor invoices the property owner → payment is received → the contractor pays the subcontractor. This multi-step process naturally extends payment timelines.

Manufacturing and Wholesale

Manufacturers often sell to distributors and retailers on Net 45 or Net 60, especially for large orders. The longer terms accommodate inventory turnover cycles and established payment schedules.

Professional Services

Consulting firms, marketing agencies, and IT service providers often encounter Net 45 terms when dealing with mid-size corporate clients who have sophisticated AP departments with monthly or bi-monthly payment runs.

Government Subcontracting

Subcontractors working under federal or state government prime contracts frequently face Net 45 or Net 60 terms, mirroring the government's own payment schedules.

Pros and Cons of Net 45 Payment Terms

Pros

• Aligns with average payment behavior — Studies show many businesses actually pay in 40-50 days on average, so Net 45 is realistic
• Reduces client friction — Giving clients slightly more time than Net 30 can strengthen relationships
• Competitive positioning — Offering Net 45 can make you more attractive than a competitor insisting on Net 15
• Practical for certain industries — Construction and manufacturing payment cycles genuinely require longer terms

Cons

• Cash flow strain — Waiting 45 days means careful planning to cover your own expenses during that period
• Increased follow-up burden — Longer terms mean more invoices "in flight" at any given time
• Higher non-payment risk — The longer the window, the more time something can go wrong (client bankruptcy, dispute, etc.)
• Requires active tracking — You need a system to know exactly where each Net 45 invoice stands at all times

How to Set Up Net 45 Payment Terms in Eonebill

Setting Net 45 in Eonebill takes seconds — and it ensures every invoice automatically shows the correct due date with clear terms.

Step 1: Log in to your Eonebill dashboard and click "New Invoice"

Step 2: Select your client from your contacts

Step 3: Add your line items — services, products, hourly rates

Step 4: In the Payment Terms field, select "Net 45" from the dropdown

Step 5: Eonebill automatically calculates and displays the due date (invoice date + 45 days)

Step 6: Add any additional notes — we recommend: "Payment due within 45 days of invoice date. Please reference invoice number with payment."

You can also add a late payment fee clause directly in the invoice notes. A common formulation: "A late fee of 1.5% per month applies to invoices unpaid 15 days after the due date."

Create your first Net 45 invoice free →

Compare Net 45 with Net 30 and Net 60 in our payment terms glossary. See Eonebill pricing to get started with automated invoicing.

Key Takeaways

• Net 45 means payment is due within 45 calendar days of the invoice date — clearly communicated on every invoice to set client expectations
• Net 45 falls between Net 30 and Net 60 — more generous than standard B2B terms but less extended than enterprise/government terms
• Common in construction, manufacturing, wholesale, and professional services — industries with multi-step payment approval processes
• Pros: Aligns with actual payment behavior, reduces client friction, practical for certain industries
• Cons: Strains cash flow if not planned, requires active invoice tracking, higher non-payment risk than Net 30
• Always add a late payment fee clause to protect yourself — even 1.5%/month discourages chronic late payers
• Use Eonebill to automatically calculate Net 45 due dates and send payment reminders before invoices become overdue — start free

Frequently Asked Questions

What does Net 45 mean on an invoice?

Net 45 means the client has 45 calendar days from the invoice date to make full payment. If the invoice is dated April 1, payment is due by May 16. The invoice becomes overdue on day 46.

What industries commonly use Net 45 payment terms?

Net 45 is most common in construction and trade services (subcontractors), manufacturing and wholesale distribution, professional services firms dealing with mid-size corporate clients, and government subcontracting relationships. It accommodates industries with multi-step payment approval processes.

Is Net 45 better than Net 30 or Net 60?

It depends on your specific situation. Net 30 is the standard B2B baseline and works well for most freelancers and small agencies. Net 45 gives clients slightly more time, which can help with client retention and aligns better with actual average payment behavior. Net 60 is for large enterprise and government clients with very long internal approval chains. Choose based on your client's payment culture and your own cash flow needs.

What are the pros and cons of Net 45 for a small business?

Pros: Realistic alignment with average payment behavior, reduces friction in client relationships, and competitive for industries where Net 45 is the norm. Cons: 45-day wait strains cash flow, requires active invoice tracking, and longer terms increase non-payment risk.

How do I add a late payment fee to a Net 45 invoice?

Include a late payment clause in the notes section of your invoice: "A late fee of 1.5% per month will be applied to invoices unpaid 15 days after the due date." Ensure this term is also in your service agreement before starting work, and verify your state's usury laws for any rate caps.