TL;DR: Send invoices on Tuesday morning between 10 and 11 AM. Data from multiple invoicing studies shows Tuesday has the highest open rate and fastest payment time. Friday invoices sit over the weekend, Monday invoices get buried in post-weekend email volume, and Tuesday hits the sweet spot where clients are caught up and paying attention.

Freelancers lose an average of 22 to 28 days waiting for invoices to get paid after the due date, according to 2026 data from Can You Pay That. But a growing body of invoicing research suggests that when you send an invoice matters almost as much as what terms you set. The right day can cut days-sales-outstanding by several days without changing a single payment term.

What Day Should Freelancers Send Invoices?

Tuesday. The data points are consistent across multiple sources.

InvoiceCave's 2025 analysis of invoice open rates found that Tuesday mornings around 10 AM have the highest open and payment rates. Monday invoices tend to get lost in the pile of emails clients accumulated over the weekend. By Tuesday, most people have cleared their inbox and are ready to handle admin tasks like paying invoices.

Friday is the worst day to send an invoice. A client who receives an invoice at 4:30 PM on Friday is not looking at it until Monday at the earliest. That invoice ages two extra days before anyone even opens it. Worse, it slides down the inbox over the weekend and may get buried under Monday morning traffic, pushing actual payment to Tuesday or Wednesday of the following week.

Wednesday and Thursday are decent second choices. They get reasonable open rates and tend to get processed before the weekend. But Tuesday consistently outperforms both in studies that track payment speed by send day.

How Invoice Timing Affects Payment Speed

Xero's Small Business Insights report found that invoices sent within 24 hours of project completion were paid 1.5 times faster than invoices sent a week later. That means a freelancer who finishes work on a Thursday and invoices Friday morning gets paid noticeably faster than one who waits until the following Wednesday to bill.

The timing effect compounds. Send the invoice Tuesday morning right after finishing the work, and the client sees it while they are already in admin-and-payments mode. Send it Friday afternoon and it sits until Monday, gets opened Tuesday, and sits in the payment queue for another few days because the client already has a pile of other invoices to process first.

The principle is simple. The sooner an invoice arrives, the sooner the payment clock starts. The earlier in the week it lands, the less weekend lag it accumulates.

What About Payment Terms?

Day of the week matters for when the invoice arrives. Payment terms matter for when it is due. Both affect how fast a freelancer gets paid.

Standard freelance payment terms are Net 30, meaning payment is due 30 days from the invoice date. That is the default most clients expect. But research from FreshBooks found that invoices with shorter terms, Net 7 or Net 14, get paid faster on average than Net 30. Clients prioritize invoices with closer deadlines.

A freelancer who sends a Net 14 invoice on a Tuesday is likely to see payment within 16 to 18 days total, including processing time. The same invoice sent on a Friday with Net 30 terms stretches the total wait to 35-plus days because the invoice ages over the weekend before the client even looks at it.

For more on structuring terms to prevent late payments, see the guide on freelance contract payment terms.

The Math: How Much Does Timing Cost?

A freelancer billing $5,000 per month across five clients at $1,000 each should see most of that money within 14 days if invoices go out Tuesday with Net 14 terms. The same freelancer sending invoices Friday afternoon with Net 30 terms waits 35 days or more for each invoice.

Over a year, that gap adds up. Getting paid two weeks faster across all invoices means roughly $2,500 less in outstanding receivables at any given time. For a freelancer operating on thin margins, that difference covers rent, software subscriptions, or groceries.

At 2.9% per transaction, processing a $1,000 invoice through PayFly costs $29. The freelancer receives $971. That is the cost of getting paid by card, which most clients prefer because it takes 30 seconds and requires no bank login or check-writing. The alternative is waiting 30 to 45 days for a bank transfer that costs nothing but ties up cash for weeks.

Invoice Timing Checklist

A few habits that cut days off the average payment wait:

Send invoices the same day you finish the work. Not the next day. Not at the end of the month. Same day. Xero's data shows 24-hour invoicing gets paid 1.5x faster than weekly invoicing.

Aim for Tuesday morning. If the work finishes on a Thursday, send the invoice Thursday afternoon. If it finishes on a Friday, hold the invoice until Tuesday morning rather than sending it Friday at 4 PM where it will sit for three days.

Include a card payment link. A client who can pay in two clicks will pay faster than one who has to log into a bank portal, find your routing number, and set up a transfer. Payment links in the invoice email cut payment time significantly.

Set Net 14 instead of Net 30. Shorter terms get paid faster. FreshBooks found Net 7 and Net 14 invoices are processed ahead of Net 30 invoices. Clients triage by deadline.

Send reminders before the due date, not after. A reminder three days before payment is due is a nudge. A reminder three days after is a collection effort. The first gets paid faster. The second gets ignored or pushed back.

For more on structuring the invoice itself, see the invoice format that gets freelancers paid faster. And for dealing with invoices that are already past due, the late fee policy that actually works breaks down what to charge and when.

FAQ

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What is the best day of the week to send an invoice?

Tuesday morning between 10 and 11 AM is the best time to send an invoice. Multiple invoicing studies show Tuesday has the highest open rate and fastest payment time. Monday invoices get buried in post-weekend email volume, and Friday invoices sit unread over the weekend.

How much faster do freelancers get paid when they send invoices immediately?

Xero's Small Business Insights report found that invoices sent within 24 hours of project completion were paid 1.5 times faster than invoices sent a week later. Sending the invoice the same day work is completed significantly reduces days-sales-outstanding.

Should freelancers use Net 30 or shorter payment terms?

Shorter terms get paid faster. FreshBooks found that Net 7 and Net 14 invoices are processed ahead of Net 30 invoices because clients prioritize invoices with closer deadlines. Net 14 is a practical compromise that clients accept and freelancers get paid within 16 to 18 days on average.

Why is Friday the worst day to send an invoice?

A Friday afternoon invoice sits unread over the weekend. By Monday it has slid down the client's inbox and gets buried under Monday morning email volume. The invoice ages two extra days before anyone opens it, pushing actual payment to the following week.

Does including a card payment link help freelancers get paid faster?

Yes. A client who can pay in two clicks via a card payment link will pay faster than one who has to log into a bank portal and set up a transfer. Payment links in the invoice email reduce friction and significantly cut payment time. PayFly charges 2.9% per transaction, so a $1,000 invoice costs $29 in fees with $971 going to the freelancer.

How much does invoice timing cost a freelancer over a year?

A freelancer billing $5,000 per month across five clients could hold roughly $2,500 less in outstanding receivables at any given time by switching from Friday Net 30 invoicing to Tuesday Net 14 invoicing. That difference in cash availability covers real expenses like rent and software subscriptions.

Send invoices with PayFly and get a card payment link in every email. 2.9% flat fee. No subscription. Start at payfly.co.