You don’t need a lawyer to collect an unpaid invoice. Lawyers are expensive, slow, and they’re overkill for most debts under $10,000. There are three viable paths: handle it yourself, use collection software, or hire a collection agency. The right choice depends on your invoice size, how far past due the account is, and how much time you can afford to spend on it.
This comparison cuts through the noise. It covers what each option costs, how long it takes, your odds of success, and the specific scenarios where each one makes sense.
The three options at a glance
| Aspect | DIY (yourself) | Collection software | Collection agency |
|---|---|---|---|
| Setup cost | $0 | $49 to $299/month | $0 to $500 per account |
| Time commitment | 3 to 5 hours per invoice | 30 to 45 minutes per invoice | 15 minutes per invoice |
| Recovery rate | 30 to 50% on 30-90 day accounts | 40 to 60% on 30-90 day accounts | 35 to 55% on 30-90 day accounts |
| Timeline | 60 to 120 days | 30 to 45 days | 45 to 90 days |
| When you get paid | Upon recovery | Upon recovery | Upon recovery |
| Best for | 1 to 3 recent invoices, trustworthy clients | 5 to 20 invoices across a month | 5+ invoices, all 90+ days old, portfolio approach |
| Legal knowledge needed | Minimal | None | Agency handles it |
| Your involvement | Constant | Reviewed and escalated | Initial hand-off only |
The key insight: for small businesses, 80% of collection cases never need a lawyer. They need persistence, sequence, and the right timing to offer a settlement.
Option 1: DIY collections (doing it yourself)
Setup: You, email, phone, and a spreadsheet. Or invoice software with built-in follow-up reminders.
Cost: $0 to $100/month if you’re using a tool like FreshBooks or Wave that includes reminders.
How it works: Send a reminder email, wait. Follow up after a week. Offer a settlement or payment plan. Escalate to a final demand letter by day 60. Most small businesses stop here and either write off the invoice or hand it to an agency.
Timeline: 60 to 120 days for a full DIY sequence.
Success rate: 30 to 50% on invoices 30 to 90 days past due, depending on the industry and the debtor’s payment history.
Realistic time commitment:
- Single invoice, $2,000 to $5,000: 1.5 to 2 hours total (one reminder email, one phone call, one final email).
- Portfolio of 5 invoices: 8 to 12 hours over 60 days (roughly 2 hours per invoice, spread across the sequence).
Pros:
- Zero upfront cost.
- You control the tone and timing.
- If the debtor is a valued client, you can keep the relationship intact.
- You learn why the invoice didn’t get paid, which helps you set better payment terms next time.
Cons:
- Takes up to 120 days. If you’re waiting for cash, that’s a long time.
- Requires consistency. If you miss a follow-up week, the momentum dies.
- You’re learning on the job. Your first few collection attempts will be slower and less effective than your tenth.
- Emotionally draining. Chasing money feels bad, and most business owners deprioritize it until the situation is acute.
- Recovery rate is lower than agencies or software, especially on older invoices.
When to choose DIY:
- You have 1 to 3 invoices under $5,000.
- They’re 30 to 60 days past due.
- The debtor is a customer you want to keep.
- You have a free 5 hours to spend over the next two months.
When NOT to choose DIY:
- You have 6+ invoices overdue.
- Invoices are older than 120 days.
- You’re already short on cash and can’t afford to wait another 60 days.
- You’ve already tried reaching out three times with no response.
DIY red line
If the debtor has explicitly refused to pay ("We're not paying that" / "We dispute that invoice" / "Call my lawyer"), DIY stops working. You need escalation at that point, either through a formal demand letter, attorney involvement, or an agency. DIY assumes there's still a possibility of a voluntary settlement.
Option 2: Collection software (do-it-for-you automation)
Collection software sits between DIY and hiring an agency. You set up the invoices, the software handles the sequence: reminder emails, letters, and escalations on a schedule. You review outcomes and decide next steps.
Examples: ti3 (Managed plan), Upflow, Chaser, InvoiceSherpa, Paidnice.
Cost: $49 to $299/month for self-serve software. Add $200 to $500/month for managed service (the software company runs the sequence for you).
How it works:
- Upload your invoices.
- The software sends a sequence of emails and letters on a schedule.
- You get reports on opens, responses, and payment status.
- The software escalates to final demand if needed.
- You decide whether to settle, forgive, or hand to an agency by day 45 to 60.
Timeline: 30 to 45 days for a complete cycle (email, letter, final demand).
Success rate: 40 to 60% on invoices 30 to 90 days past due. Better than DIY because the sequence is consistent and carries more authority (letters feel different than emails).
Realistic time commitment:
- Setup: 30 minutes (entering the invoices).
- Per invoice: 5 to 10 minutes per week to review responses and decide on next steps.
- Portfolio of 10 invoices: 45 minutes per week to oversee the sequence.
Pros:
- Fast. Most accounts settle or are clearly resolved by day 45.
- Consistent. The software won’t forget to send the week-2 email.
- Letters carry psychological weight. A physical letter is different from email 5 about the same invoice.
- Managed versions handle the whole sequence for you (you don’t even look at it).
- Better recovery rate than DIY, especially on older or difficult accounts.
- No agency fee. You keep 100% of what you recover.
Cons:
- Monthly cost ($49 to $500/month, depending on the plan).
- Setup and learning curve. You need to get the invoices into the system correctly.
- Less flexibility than DIY. You can’t have a personal conversation to solve the problem mid-sequence.
- Not suitable for complex disputes. If the debtor says “the invoice is wrong,” software doesn’t handle negotiation.
- If it doesn’t work by day 45, you’re still responsible for deciding what to do next (settle, write off, escalate).
When to choose collection software:
- You have 5 to 20 invoices in various stages of lateness.
- Most are 30 to 90 days past due.
- You don’t want to manually manage emails and follow-ups.
- You’re willing to keep 100% of recovery (no agency cut).
When NOT to choose:
- You have just 1 to 2 invoices. The fixed monthly cost doesn’t justify it.
- Your invoices are all past 120 days. Software works best on fresher debt.
- The debtor has already disputed the invoice or clearly refused. Software can’t negotiate.
Software + agency combo
Many businesses use both. Software for the recent stuff (30 to 90 days), agency for the old stuff (120+ days). The software recovers quickly on new debt; the agency specializes in the difficult cases that software alone won't budge.
Option 3: Collection agencies (hire a professional)
Cost: $300 to $500 per account (flat fee) or 20 to 50% of recovery (contingency). Most charge flat fees for smaller portfolios.
How it works:
- You send the agency your invoice list and contact info.
- The agency sends letters, makes calls, and negotiates with debtors.
- If they recover the money, it goes straight into your account (they take their fee from what’s recovered or have already collected the flat fee upfront).
- You get a monthly report on status.
Timeline: 45 to 90 days for initial recovery. Difficult cases can drag longer.
Success rate: 35 to 55% on 30 to 90 day accounts, 25 to 40% on 120+ day accounts. Higher on older debt if the debtor is avoiding you (the agency’s authority carries weight).
Realistic time commitment:
- Initial intake: 15 minutes (gathering invoice details, signing the agreement).
- Per week: 5 minutes to monitor progress.
- No follow-up work. The agency handles it all.
Pros:
- You do almost nothing after you hand over the list.
- Fast results (45 to 60 days vs 120 days DIY).
- High recovery rate on difficult or old accounts.
- Professional pressure. Debtors respond differently to an agency than to the creditor.
- If you choose contingency pricing, you pay only if they recover (zero cost to try).
Cons:
- Cost. $400 to $600 per invoice (flat fee) or 25 to 50% of recovery (contingency).
- You lose 30 to 50% margin on recovery (contingency) or prepay a fee that you don’t recover if the account is already written off (flat fee).
- Less control over tone. The agency sets the approach.
- Can damage relationships. Debtors take agency contact as a sign of escalation.
- Harder to negotiate settlements. Agencies want recovery, not payment plans.
- Not suitable for small invoices under $500. The agency fees exceed the invoice value.
When to choose an agency:
- You have 5+ invoices overdue, all 60+ days.
- Total portfolio value is $5,000+.
- You’ve tried DIY or software and it didn’t work.
- You don’t care about preserving the relationship with the debtor.
- You want someone else to handle it entirely.
When NOT to choose:
- You have 1 to 3 invoices. The fees aren’t justified.
- Invoices are under $500 each. Fee exceeds the value.
- The debtor is a repeat client you want to keep.
- You prefer to keep 100% of recovery and don’t mind the time cost.
Agency fee trap
Flat-fee agencies often discount for larger portfolios ("5 accounts for $350 each instead of $400 each"). Do the math before committing. If your portfolio is mostly accounts 120+ days old (lower recovery), the flat fee might exceed what you actually recover. Contingency is safer for old debt; flat fee is better for newer accounts with higher recovery probability.
Comparison: when each option wins
Under $2,000 per invoice, 30 to 45 days old, customer you want to keep: DIY wins. Send two emails and a call. If it works, you’re done in 3 hours for free.
$2,000 to $5,000, mix of 30 to 120 day accounts, 5+ invoices: Collection software wins. Cost is $100 to $300/month, recovery rate is 40 to 60%, and you get results in 30 to 45 days without the agency fees eating the margin.
$5,000+, 90+ days old, hostile debtor, 5+ accounts, you’ve already tried once: Agency wins. The fee ($1,500 to $2,500 for a 5-invoice portfolio) is worth it for the speed and the labor saved.
Complex dispute (“they say the invoice is wrong”): DIY or attorney, depending on the amount. Collection software and agencies assume the debt is valid and just need leverage. Disputes need negotiation.
Mixture of recent and very old accounts: Use software for recent (30 to 90 days), agency for old (120+ days). Software is cost-effective on newer debt; agencies specialize in the difficult ones.
The lawyer question
You don’t need a lawyer to collect on an unpaid invoice in most cases. Small-claims court (for invoices under $5,000 to $10,000 depending on state) is a public-filing option if you want to force a legal acknowledgment, but most businesses don’t go that far.
When you DO need a lawyer:
- The debtor is claiming you did faulty work (dispute).
- The debtor is threatening to countersue.
- The invoice exceeds $20,000 and the debtor has assets (litigation is worth it).
- Collection has failed and you want to attempt judgment.
When you DON’T need one:
- The invoice is under $10,000.
- The debtor is just slow-paying, not disputing.
- You’re trying the first time.
Even then, you can try DIY, software, or an agency first. If those fail and the amount is large enough, then talk to an attorney about small-claims court filing or a demand letter from a law firm (which costs $500 to $1,000 and sometimes works via the letterhead effect).
The decision tree
-
How many invoices are past due?
- 1 to 3: Go to DIY
- 5 to 20: Go to Software
- 5+: Go to Agency
-
How old are they?
- 30 to 60 days: DIY or Software (high recovery)
- 60 to 120 days: Software or Agency (time matters)
- 120+ days: Agency (DIY is slow, software plateaus)
-
How much is owed?
- Under $500 each: DIY only (agency fees exceed value)
- $500 to $2,000 each: DIY or Software
- $2,000 to $10,000 each: Software or Agency
- Over $10,000: Consider attorney
-
Do you want to preserve the relationship?
- Yes: DIY or Software (personal touch)
- No: Agency (speed, authority, hands-off)
-
Is there a dispute about the invoice?
- Yes: DIY or Attorney (need negotiation or legal weight)
- No: Software or Agency (collection sequence works)
FAQ
What’s the difference between contingency and flat-fee agencies?
Flat-fee agencies charge upfront ($300 to $500 per account) whether they recover or not. Contingency agencies take 20 to 50% of what they recover. Flat fee is better if your accounts have a high recovery probability (recent, reliable debtors). Contingency is better for old debt where you’re unsure if anything will be recovered.
Can I do DIY and then hand to an agency later?
Yes. Most agencies prefer it, actually. Your DIY attempt creates a documented email history showing you tried to resolve cooperatively, which actually strengthens the agency’s position with the debtor.
Will using a collection agency hurt my reputation?
Only with the debtor, and only if they didn’t pay. If a customer pays your invoice on time, they never know you considered sending them to an agency. If they ignore your invoice for 90 days, the relationship was already damaged. Using an agency is an acknowledgment of that reality.
Can I negotiate a settlement if I use an agency?
It’s harder. Agencies are built for collection, not negotiation. If you think a settlement is likely (e.g., the debtor says “I can pay half now and half in 30 days”), handle it yourself or use software. If you’ve given up on settlement and just want the money collected, use an agency.
What if I can’t afford to wait 60 days?
Collection agencies are faster (45 to 60 days) but cost more. If cash flow is critical, the agency fee might be worth it just for the speed. Alternatively, take out a small business line of credit or invoice financing to bridge the gap while you collect.
Is ti3 a collection agency?
No. ti3 is first-party collection software. You run the recovery on your own behalf, in your own name. You keep 100% of what you recover. ti3 handles the sequence and the documentation. It’s comparable to DIY but faster and more consistent. The Managed plan means ti3 operates the software for you, but it’s still your account, your money, your branding.
For most small business owners: the choice comes down to how many invoices you have and how much time you want to spend. One or two invoices? DIY works. Five or more? Use software to stay organized. More than that or very old debt? An agency pays for itself in time saved.
The one thing you should never do is nothing. An unpaid invoice that sits for 180 days becomes a write-off. An unpaid invoice that’s actively worked on often resolves. Pick a path, start now, and adjust if needed.