The first 90 days after buying a business

Published October 25, 2026 · Facts checked as of October 2026

Short answer

In the first 90 days after buying a business, protect the cash and keep things running the way they ran before. Week one: bank accounts, payroll, payment processing and controls. Weeks two to six: meet every employee and the top customers and suppliers, with the seller beside you. By day 90: you understand the numbers monthly, you've written down how the business works, and you have a short list of changes you've earned the right to make.

The most common mistake is changing too much, too fast, before you know why things were done the way they were.

The first three months are when a business is most fragile. Staff wonder whether their jobs are safe. Customers wonder whether service will change. Suppliers wonder whether you'll pay. And you're learning everything at once while carrying a new loan. The goal isn't to improve the business yet. It's to not break it, while you learn how it really works.

Money first, people second, changes last.

Week one: money and control

Customer payments land in your account: card processor, payment apps, ACH details on invoices, online store payouts.
Payroll runs on time under your entity, with correct tax registrations.
Supplier bills come to you and are paid from your account; autopays moved.
Every password and admin login is in your name; the seller's access is reduced to what the transition needs.
Basic cash controls: who can take cash, who counts it, who deposits it, and how often. Businesses often run on the seller's personal trust in long-time staff; you don't have that trust yet.
Insurance in force and certificates sent to the landlord and lender.

Weeks two to six: people and relationships

Staff. Meet everyone, with the seller present at first. Then one-to-ones: what do you do, what gets in your way, what should I not change? Identify the two or three people the business can't lose. See keeping key employees.
Customers. Personal introductions to the top customers by revenue, ideally in person. Ask what they value and what annoys them.
Suppliers. Introduce yourself, confirm terms, ask about any informal arrangements the seller had.
Routines. Shadow every role for at least a shift. Write down how things are done as you learn them.

Weeks seven to thirteen: numbers and earned changes

Close your first months properly: monthly P&L, cash, receivables, payables. Compare with the seller's history for the same months.
Watch the cash proof yourself: deposits against sales, every week. You now know exactly what normal looks like.
Start a list of improvements, and pick a few that staff and customers have asked for. Early wins that make people's lives easier buy goodwill for harder changes later.
Plan the end of the seller's transition, and make sure every relationship that depended on them has moved to you.

Questions to ask yourself at day 30, 60 and 90

Day 30: Is all customer money landing in my accounts? Has anyone important left? What surprised me?
Day 60: Are monthly results tracking the seller's history? Which processes depend on one person?
Day 90: Do actual earnings match what I underwrote? Which three improvements will I make next, and how will I measure them?

Changes to hold off on

Usually wait

Raising prices, cutting staff, switching main suppliers, rebranding, changing the core product or service, new software everyone must learn.

Usually fine early

Fixing broken equipment, paying bills on time, cleaning up the books, small things staff have asked for, better cash controls.

Worked example: a weekly dashboard for the first quarter

Illustrative example for a service business

Track six numbers every Monday, compared with the same weeks last year from the seller's records: revenue booked, cash deposited, jobs completed, new customers, customers lost, and payroll hours. In week 5, revenue is 4% behind last year but deposits are 9% behind. The gap is receivables: two commercial customers stopped paying while they waited to hear from the new owner. A phone call fixes it. In week 9, customers lost jump from a usual 3 a week to 8. The cause is a technician who left, and his regular customers weren't reassigned. Neither problem would show up in a monthly P&L until weeks later. A simple weekly sheet catches them while they're small.

Weekly numbers catch problems a month earlier than monthly ones.

Day-one checklist

Bank accounts open in the buying entity's name; card processor, payment apps and ACH payments pointing to them.
Payroll set up under your EIN, with state withholding and unemployment registrations done.
Insurance bound in your name: general liability, property, workers' compensation, auto, and any professional or product coverage.
Utilities, phones, internet, software and the domain transferred or in progress.
All passwords changed; the seller's access limited to what the transition needs.
Licences and permits in your name, or interim approvals in hand.
A short meeting with staff on day one: who you are, what's not changing, who to ask.

What staff want to hear in week one

Employees usually worry about three things after a sale: their jobs, their pay, and who they report to. Answer those directly in the first meeting, in plain language: what isn't changing, when you'll talk to each person individually, and who to go to with questions. If any changes are planned (benefits, payroll provider, schedules), say when and why. Then keep every promise you made. Trust built in the first month is what lets you make changes later.

The financial check-in

Around day 90, compare actual results with the earnings you underwrote. If revenue is tracking below the seller's history, find out why quickly: seasonality, a customer who left, a staff member who took clients, or numbers that were never as good as presented. The earlier you understand the gap, the more options you have. If you used a seller note, check whether the purchase agreement gives you remedies for misrepresented financials. See reps and warranties.

A letter to customers

A short joint letter from you and the seller, sent in the first week, tells customers what is changing and, more importantly, what isn't.

Dear [customer], after [years] years, [seller] has passed the business to [your name]. The team you work with is staying, prices and terms are unchanged, and [seller] will be working with us through [month]. If you have questions, call me directly at [number].

Follow it with a call or visit to the largest customers. Ask what they value and what they would change, and write it down.

Mistakes new owners make in the first 90 days

Changing prices, staff or suppliers before you understand why things are the way they are.
Letting the seller's access to bank accounts and systems continue longer than agreed.
Not paying yourself, so you can't tell whether the business really covers your living costs.
Skipping the weekly numbers because you are busy with operations.
Waiting for problems to be raised instead of asking staff what isn't working.

Write a short note to yourself at day 90 on what you have learned. Then plan the next quarter.

Frequently asked questions

Should I make changes right after buying a business?

Small fixes, yes. Big changes to pricing, staff, suppliers or the product, generally not until you've seen a full cycle of the business and understand why things are the way they are. Customers and staff are watching for signs the place is about to change.

What should I do on day one?

Make sure money moves correctly: your bank account receives payments, payroll will run on time, bills are paid from the right account, and you control the passwords. Then meet the team with the seller.

How do I keep customers after buying a business?

Personal introductions from the seller, no sudden price or service changes, and quick responses. Call the top customers yourself in the first weeks.

When should the seller leave?

When the relationships and routines that depend on them have been handed over. Set this in the transition agreement; in SBA initial acquisitions, the seller's consulting can't exceed 24 months in total.

When should I raise prices after buying a business?

Usually after you understand which customers are price-sensitive and how the business delivers value, often several months in. Start with customers or services that are clearly underpriced, explain the change, and watch cancellations closely. An early across-the-board increase is one of the most common causes of customer loss after a sale.

What are the most common mistakes in the first 90 days?

Changing prices, staff or suppliers too quickly; losing track of cash while learning the business; letting the seller's access and relationships linger without a plan; and not measuring weekly results against what you underwrote. Most early problems come from moving fast before understanding why things are done the way they are.

Sources

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General information, not legal, tax, financial or investment advice. Rules and lender practices change; check the linked sources and talk to your attorney, CPA and lender about your deal. Examples with named numbers are illustrations, not real businesses. OKtoBuy's Deal Check does not value businesses or give price opinions.