QuickBooks & Xero certifiedUS-governed · McLean, VA
Outsourced bookkeeping & accounting · US businesses

Bookkeeping that
pays for itself.

Books closed by Day 5 and CPA-ready every month, for a fraction of an in-house hire. Add medical billing, automation, HR and growth when you’re ready — one accountable partner for all of it.

Day 5Monthly close, by the 5th business day
48hFrom call to a scoped proposal
10–15Hours handed back every week
0Coverage gaps when you switch
QuickBooks Online Advanced Certified ProAdvisor Xero Certified Advisor
US-governed engagements · McLean, VA
HIPAA-compliant BAA available
Built for
Medical practicesDentalPharmaciesE-commerceNonprofitsRestaurantsRetailTrades & constructionProfessional services
The hidden cost

It never shows up on an invoice.
It leaks out of your books.

Every business has the same quiet problem: the books are behind, so you're deciding on last quarter's numbers. Expenses go uncategorized, invoices age past collectible, deductions get missed — and none of it ever sends you a bill.

See what yours is costing
Missed deductionsInvoices aging past 90 days Uncategorized expensesA close that lands weeks late Duplicate subscriptionsLate-filing penalties Cash-flow surprisesHours lost to admin
Start with the books

Clean books first.
Everything else when you’re ready.

Bookkeeping is where most clients start, and it’s the foundation everything else runs on. Add billing, automation, HR and growth as you grow — no new onboarding, no new vendor to manage.

01Most clients start here

Bookkeeping & Accounting

Clean books, closed by Day 5

A complete accounting function without a full-time hire — reconciled, CPA-review-ready, with plain-English commentary on what changed and why.

  • Monthly close by Day 5
  • Bank, card & merchant reconciliations
  • AP / AR management
  • Variance commentary you can act on
  • Payroll coordination
  • Catch-up & clean-up
From$350/moEssentials · up to 100 transactions a month · fixed, agreed in writingFounding-client rate $299/mo · first 20 clients
In-house bookkeeper$55k–$75k/yr
Sterlingfrom $4,200/yr
QuickBooks Online Advanced Certified ProAdvisorXero Certified Advisor
Add when you’re ready
02
from5% of collections

Medical Billing & RCM

Coded clean, paid faster

Full revenue cycle for physician practices: eligibility, coding, scrubbing, denial management, posting and credentialing.

EligibilityCodingDenialsCredentialing
Explore medical billing
03
builds from$3,500

Automation & AI

Build once, run forever

We map where the hours go, then build the workflows that remove them for good — with a human approval gate on everything.

AI agentsWorkflowsIntegrations
See what we automate
04
from$150/mo

Outsourced HR

A people function, no HR salary

Payroll admin, on- and offboarding, benefits, PTO and time, handbooks and compliance kept current as the rules change.

PayrollOnboardingBenefitsCompliance
What HR covers
05
from$750/mo

Digital Marketing

A pipeline, not just posts

SEO, paid media, content and landing pages tied to your real unit economics — CAC, LTV and the channels that pay back.

SEOPaid mediaContentAttribution
How we report on revenue
How we're different

A qualified expert on your side —
at a fraction of the cost.

We're not a bot you're left to babysit, and we're not juniors learning on your books. Precision tools clear the repetitive first pass; an experienced professional reviews, decides and owns the result.

01

Data flows in

Read-only feeds from your banks, cards, payroll and payment platforms.

02

AI clears the first pass

The repetitive volume — categorized, matched and flagged in hours, not days.

03

A professional decides

A qualified reviewer works every exception and corrects what the machine got wrong.

04

One team owns it

End to end, with a named person accountable for the number landing on time.

Our standards

What good looks like.

Day 5Monthly close, every month
48hFrom first call to a fixed-price proposal
98%+First-pass clean claims (medical billing)
2–6wksCutover with no cash-flow gap
Our commitments

What you can hold us to

  • Books closed by the 5th business day, every month
  • A scoped, fixed-price proposal within 48 hours
  • Fixed pricing in writing — no surprise invoices
  • No multi-year lock-in — we earn the relationship every month
  • A named, accountable owner for your work
Who we serve
NonprofitsMedical & dentalPharmaciesE-commerce RestaurantsRetailTrades & constructionProfessional services

Service-level figures reflect 2026 industry benchmarks for well-managed engagements, not guarantees; results vary by volume, payer mix and documentation quality.

Switching is easier than staying stuck

From first call to running smoothly,
in weeks.

Day 0 · Free

Free consult

We map where the money leaks — a review of your last 90 days. A straight answer, even if it's to keep what you have.

Within 48 hours

Scoped in 48h

A written plan with exact deliverables, timeline and fixed pricing.

2–6 weeks

Parallel run

We run alongside your current setup — no coverage gap, no cash-flow dip.

Ongoing

Live

Reconciled, reported back and closed on a fixed calendar every month.

The people behind your work

Not a faceless vendor.
A team you can name.

120 years of combined experience across Big 4 audit, US HR, healthcare billing and enterprise IT. Every service line is led by a director who owns the result.

Founded by Mariyam Khan and Mohsin Mustafa · governed by Global Excellence Consulting Group Inc., McLean, VA.

Meet the team

See what your books are quietly costing you.

A free review of your last 90 days: where your books stand, where the gaps are, and a scoped proposal within 48 hours — whether or not you hire us.

No obligationNo lock-inFixed pricing in writing
Websterlingbackoffice.com
Office1660 International Dr, Suite 600
McLean, VA 22102