How much does it cost for an OPC (one-person company) to use AI tools, and can they replace three full-time staff members?
The honest answer: AI tools can replace part of the work of three positions at a much lower cost than salaries, but they cannot replace three people in every aspect; the difference is made up by your own time spent on supervision, checking, and handling exceptions. Around 2 million đồng per month can cover a basic set of tools (roughly one AI assistant, one automation tool, and one design tool), but this does not include servers, domain names, taxes, and most importantly, your time. This post provides a cost breakdown table based on prices listed on 24/10/2026, a comparison with full-time staff costs, which tasks can be transferred to AI and which cannot, and how to calculate it for your own business.
Tools are cheaper than staff, but the real cost includes your supervision time. Diagram: OPCAIOS.
How much does a basic tool set cost?
Prices are listed from official websites as of 24/10/2026, not including taxes. I'm using these exchange rates for rough conversion: 26,000 ₫ per USD and 30,000 ₫ per EUR; please recalculate based on today's exchange rate.
| Item | Listed Price | Approximate Monthly Conversion |
|---|---|---|
| AI Assistant (Claude Pro) | 17 USD per month if paid yearly, 20 USD if paid monthly | around 440,000 to 520,000 ₫ |
| Automation Tool (n8n Starter) | 20 EUR per month (paid yearly, 2,500 runs) | around 600,000 ₫ |
| Presentation Tool (Gamma Plus) | 203,200 ₫ per month (price shown in Vietnam) | around 203,000 ₫ |
| Total for three items | around 1.25 to 1.3 million ₫ | |
| Reserve: domain, small server, email, design tool | depends on provider | remaining within 2 million ₫ |
For detailed prices, see AI Tool Set for OPC Model, What is n8n? and What is Gamma?. There are cheaper options: n8n Community Edition self-hosted for free (requires a server, see What is VPS?), Dify Community self-hosted for free (see What is Dify?); in exchange you maintain it yourself. There are more expensive options when needed: Claude Max from 100 USD per month.
Compared to the cost of three full-time staff members
The cost of three full-time staff is the salary plus associated expenses, and the floor of this amount is already much larger than an AI tool set. The regional minimum wage for Zone I from 1/1/2026 is 5,310,000 ₫ per month according to Decree 293/2025/NĐ-CP (cross-reference the original text before use). Example for illustration: three staff at exactly the minimum wage costs 15,930,000 ₫ per month, while a basic tool set is around 1.3 to 2 million ₫, or about 8% to 13% of that amount.
| Calculation | Amount Per Month |
|---|---|
| Three staff at regional minimum wage Zone I | 15,930,000 ₫ |
| Plus insurance, taxes, allowances, equipment, management | higher; we have not looked up specific rates so we cannot estimate |
| Basic tool set from above | around 1.3 to 2 million ₫ |
The actual salary of skilled staff (content, customer care, operations) is usually higher than the minimum wage, but we don't have general figures so we won't state one. The point to remember is that this comparison is not yet fair: tools are not people.
What can tools replace and what can't?
AI tools can replace repetitive work with a pattern, while perspective, relationships, and responsibility still belong to the business owner.
| Task | What Tools Can Do | What Remains |
|---|---|---|
| Content Writing | Drafts, variations, format conversion | Perspective, review, positioning |
| Customer Care | Answer common questions, categorize | Complaints, exceptions, relationships |
| Repetitive Operations | Reminders, reports, data entry | Handling when process breaks |
| Sales | Draft emails, follow-up, reminders | Deal conversations, relationships |
| Creative Delivery | Drafts, images, slides | Quality control, aesthetics |
The remainder is your work. So the real cost of the model is not just tool fees but the hours of your time each week.
How do I calculate costs for my business?
Self-calculating costs is a comparison between the hours saved and the total cost of tools plus your own time. Do these five steps in order:
- List the repeating tasks each week and the hours you or your staff spend on them.
- For each task, estimate the remaining hours after using the tool (including review and editing).
- Convert saved hours into money using your self-assessed hourly rate.
- Subtract tool costs, initial setup time, and maintenance.
- Check results after 90 days; if the tool is unused, cut it.
Example: an OPC owner saves 5 hours a week using Claude Pro and n8n Starter. If they value their hour at 100,000 ₫, then 20 hours a month adds up to 2,000,000 ₫, and this number only matters when it exceeds total tool costs plus setup time. Cut tools you don't use regularly: small subscription fees add up fast.
Costs often overlooked
- Tokens and usage-based fees: many services charge extra when you exceed limits.
- Setup and learning time: the first few weeks are usually slower.
- Maintaining automation: tools change, workflows break.
- Tax, accounting, legal: need specialists.
- Security and backup.
OPCAIOS experience
We use a few paid tools, build many components ourselves or self-host on private servers, and track monthly token limits to avoid exceeding AI costs. We don't share our total monthly costs, have no direct comparison data against staff costs, and don't claim any fixed toolset replaces any fixed number of people; every business differs. The lesson: tool costs are small, the biggest cost is the owner's time.
Read more: Running multiple AI models through one gateway; The "Pull the plug" scenario.
Frequently asked questions
Is 2 million a month enough for an OPC's AI toolset?
Enough for a basic set (AI assistant, automation, presentation tool) at list prices as of 10/24/2026, not including server, domain, tax, and your time.
Can AI tools replace three staff members?
AI tools replace part of their tasks, not their whole role. The replaceable part includes drafting content with Claude, reminders and recurring reports with n8n, building slides with Gamma. The remaining part is complaints, exceptions, sales conversations, quality control, and this still belongs to the business owner. The cost gap is therefore covered by your time supervising and handling exceptions.
What is the current minimum wage?
The minimum wage for Region I from 1/1/2026 is 5,310,000 ₫ a month under Decree 293/2025/NĐ-CP. This is a floor, so check the original text before using it for real calculations. First, at this rate, three staff members at exactly the floor wage cost 15,930,000 ₫ a month, not including insurance, tax, allowances, equipment, and management. A basic AI toolset costs around 1.3 to 2 million ₫ a month at list prices as of 10/24/2026, or roughly 8% to 13% of the wage floor. Second, the comparison is illustrative only, because tools are not people. For example, skilled staff usually earn more than the minimum wage.
Should I pay monthly or yearly?
Yearly is usually cheaper but locks your money for 12 months. According to list prices as of 10/24/2026, Claude Pro is $17 a month paid yearly and $20 paid monthly, a difference of about $3 a month, or $36 a year. Example: with Claude Pro, paying yearly saves $36 but locks capital for 12 months, so it's only worth it if you're sure you'll use it consistently. The safety rule has two steps. First, use a few months with monthly payment to make sure the tool helps. Then only switch to yearly payment for tools you use regularly. To get guidance on picking tools by need, see OPCAIOS's AI application training course.
Source: Claude, n8n, Gamma pricing pages (read 10/24/2026, tax not included, subject to change); region minimum wage from search results about Decree 293/2025/NĐ-CP (original text not verified); exchange rate is OPCAIOS assumption. Calculations are illustrative, not a savings guarantee. Experience is OPCAIOS's.
Translated from Vietnamese with AI. Read the original.
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